JP2011081232A - Eyeglass lens - Google Patents

Abstract

An eyeglass lens capable of improving fashionability and providing a more efficient glare cut function is provided.
A highly transmissive region 12 including an eye point (eye position when wearing glasses, pupil center position, fitting point) 11 and at least three sides of the highly transmissive region 12 are surrounded. The eyeglass lens 10 has a low light-transmitting region 14 and a low light-transmitting region 14 having a higher light blocking rate than the high light-transmitting region 12, and is fashionable and capable of glare cutting. .
[Selection] Figure 1

Description

  The present invention relates to a spectacle lens.

  Patent Document 1 describes providing a staining method capable of longitudinally symmetric dyeing even when the lens layout differs between right and left. Therefore, in Patent Document 1, for a spectacle lens, a step of calculating a vertical center line in a processed lens shape assumed on the lens, and a staining density change end position are determined based on the vertical center line. Immersing the lens for spectacles in the dye solution with the dyeing start position at the bottom and the dyeing density change end position at the top, and the dyeing density continuously increases from the dyeing start position to the dyeing density change end position. A dyeing method comprising a step of dyeing so as to decrease is described.

  In Patent Document 1, for example, the processing lens for the left eye has a non-stained portion (bright portion) that is not stained and a portion that is stained, and the portion that is stained is, From the inside to the outside (as moving away from the center of the spectacle frame in the horizontal direction), the dyeing density is continuously increased. That is, the staining density gradient of the portion of the left eye processed lens that is stained is dyed so as to gradually increase from the center side of the spectacle frame toward the outside. As a result, a lightly stained portion having a relatively low staining density (high transmittance) is formed inside the dyed portion, and a dark portion having a relatively high staining concentration (low transmittance) is formed outside. .

JP 2008-9327 A (summary and paragraph number 0043)

  The technology disclosed in Patent Document 1 provides a spectacle lens that can be dyed symmetrically and has high fashionability and is highly longitudinally dyed. Moreover, in a spectacle lens, giving a continuous density change by dyeing has the main purpose of improving fashionability.

  The main purpose of eyeglass lenses is to correct vision, and to improve fashionability is also important. Furthermore, it is possible to reduce glare by introducing light shielding properties into the spectacle lens. The visual efficiency can be improved by reducing the glare. One of the objects of the present invention is to provide a lens that not only improves fashionability or increases the selection range, but also provides a more efficient glare mitigation or glare cut function.

  One embodiment of the present invention is a lens that covers the front of the eye, and includes a highly light-transmitting region that includes eye points (eye position when wearing glasses, pupil center position, fitting point), and high light-transmitting properties. This is a lens having a low light-transmitting area provided so as to surround at least three sides of the upper, lower, left, and right areas, and a low light-transmitting area having a higher light blocking ratio than the high light-transmitting area.

  This lens has glare light that is incident from at least three directions around the high light-transmitting region including the eye point by a low light-transmitting region provided so as to surround at least three sides of the high light-transmitting region. Can be reduced or light-shielded (cut), and the anti-glare effect is high. On the other hand, a good visual field can be ensured by the highly light-transmitting region including the eye point. Furthermore, the low light-transmitting area provided so as to surround at least three sides of the top, bottom, left and right of the high light-transmitting area is a change in lens color density (shading), a change in reflectance (transmittance), and a fine pattern. The change can be applied to the lens as a change visible from the outside, such as a change in aperture ratio realized by the above. Therefore, according to the present invention, a lens having a unique pattern (design) such as a C-shape (including an inverted C-shape or a shape in which the C-shape is vertically oriented), a U-shape, an O-shape, or a donut shape. Can provide.

  Therefore, it is possible to provide a lens having a high decorative effect that has a high antiglare effect, can secure a good visual field, and can supply a new design. A lens that can reduce or cut glare from multiple directions is effective for protecting the eyes and ensuring a comfortable field of view for general users, and is more effective for users with eye disorders such as cataracts. Since this lens can be worn by ordinary users as highly decorative glasses, it can be easily worn by users with disabilities and can be provided as a universally designed lens.

  It is desirable that the low light-transmitting area of the lens includes an area where the light shielding rate changes toward the periphery. A change in the light blocking ratio can also be applied to the lens as a change visible to the outside, such as a change in the color density (shading) of the lens, a change in the reflectance (transmittance), a change in the aperture ratio realized by a fine pattern, etc. . Therefore, it is possible to provide a lens with a new fashion and high fashion. Furthermore, in this lens, the wearer can see the outside through a region (gradient region) in which the light shielding rate changes not only in the high light-transmitting region but also in the periphery of the low light-transmitting region. It is possible to suppress the viewing angle from becoming extremely narrow with respect to the area. Further, by controlling the width of the region where the light shielding rate changes toward the periphery and the change rate of the light shielding rate, the viewing angle that can be secured with respect to the area of the lens can be controlled.

  It is desirable that the low light-transmissive region includes a region where the light shielding rate increases toward the periphery. It can suppress that a clear boundary arises between a high translucency area | region and a low translucency area | region. Therefore, it is possible to provide a lens that is more fashionable. In addition, since there is a clear boundary between the high light-transmitting region and the low light-transmitting region, it is possible to prevent an uncomfortable feeling in the visual field. Therefore, it is possible to provide a lens that can be used more easily by general users and users with disabilities.

  In this lens, it is desirable to provide the low light-transmissive region so as to include at least the upper and lower sides and the ear side of the high light-transmissive region. It is possible to suppress or block (cut) the glare light on the upper, lower, and ear sides of the highly translucent region where the glare light is likely to enter the nose side of the lens, and to secure a good field of view with a high anti-glare effect. You may provide a low translucency area | region including the nose side of a lens.

  One form of the low light-transmitting region is a C shape (including an inverted C shape). The C-shape includes a figure in which circles or ellipses having different large and small radii overlap each other with their centers shifted, and a part of the circumference of the large diameter (circumference) is missing due to the circumference of the small diameter (circumference). The C-shape with the nose side cut can easily secure a wide field of view on the nose side and suppress glare light in the vertical direction on the nose side. The C-shape with the lower side cut can easily secure a bright field in the near-use area, particularly in a progressive refractive lens having a distance-use area and a near-use area, and can suppress glare light in the nose-side and ear-side directions.

  In this lens, it is desirable that the high light-transmissive region includes a region having a viewing angle of at least 10 degrees and a total light blocking ratio of 0 to 95%. The area where the head does not move during discrimination (the movement area of the eyeball during discrimination) is an area with a viewing angle of about 10 degrees, and this area is brighter than the low-transmission area. By securing it as a light-sensitive region, it is possible to provide a lens that is more suitable for universal design, with less discomfort when used by the user, and less difference in usage.

  In this lens, it is desirable that the high light-transmissive region further includes a region where the viewing angle is narrower than 20 degrees and the total light blocking ratio is 0 to 95%. Glare with a viewing angle wider than 20 degrees is soft glare light (failure glare light, reduced glare light), and unlike glare light (discomfort glare light) in areas with a small viewing angle, glare light intrusion Even if it is not avoided, a decrease in work efficiency can be suppressed by suppressing the glare light. Therefore, the range of the high light-transmitting region is limited to a viewing angle of 20 degrees, and the region having a viewing angle larger than 20 degrees is a low light-transmitting region, thereby suppressing glare light that tends to hinder work from entering the eye. desirable.

  Furthermore, in this lens, the low-light-transmitting region includes a first low-light-transmitting region and a second low-light-transmitting region provided so as to surround the entire circumference of the first low-light transmitting region. And it is desirable to include the 2nd low translucency area | region where the light-shielding rate is higher than a 1st low translucency area | region. A low light-transmitting region that suppresses the entry of obstacle glare light includes a first region that gives priority to so-called free vision that roughly recognizes an index (object), and a second region that gives priority to blocking glare light. By including multiple stages, it is possible to suppress the influence of glare light and further improve the contrast sensitivity (the quality of appearance and the quality of vision). The first low light-transmissive region desirably includes a region having a viewing angle narrower than 30 degrees and a total light blocking ratio of 0 to 95%. In addition, by providing multi-stage areas with different light shielding rates, it is possible to change the color of the lens and change the reflectance in the low light transmissive area, further improving fashionability, Can provide high-value lenses.

  In this lens, it is desirable that the low light-transmitting region includes a region with a high light shielding rate of near-infrared light, that is, light having a wavelength of 760 to 1300 nm. For users who have symptoms of retinal diseases and choroidal diseases, it is possible to improve the discrimination ability by suppressing glare light in this frequency band, and to suppress the reduction of work efficiency.

  In this lens, it is also effective that the low light-transmitting region includes a region with a high light blocking rate of near-ultraviolet light, that is, light having a wavelength of 310 to 400 nm. For users with symptoms such as keratitis, cataracts and glaucoma, the ability to discriminate can be improved by suppressing glare light in this frequency band, and the reduction in work efficiency can be suppressed. Suppressing near-infrared light and / or near-ultraviolet light while securing a visual field is also effective for preventing the occurrence of these eye disorders, and the present invention is applicable to users who do not have symptoms of these disorders. The lens is useful.

  The lens of the present invention has a distance region for viewing relatively far, a near region for viewing relatively close, and an intermediate region in which the refractive power continuously changes between the distance region and the near region. It may be a progressive power lens further having a region. In the progressive-power lens, it is desirable that the eye point that is the center of the high light-transmitting region is the center of the distance region. Reducing the effect of obstruction glare light in the far-field area tends to improve discrimination ability. Further, it is possible to provide a fashionable lens having an eye point at the distance center of a progressive-power lens whose refractive power continuously changes. Furthermore, even when the near-field region formed below the far-field region extends to the periphery of the lens, the upper side of the highly translucent region with the center of the far-field region as an eye point, Glare light entering from the nose side and ear side can be shielded (cut) to enhance the antiglare effect and ensure a good visual field.

  In this lens, the low light-transmitting region may include a region where at least a part of the lens is stained. Dyeing is one of the methods for increasing the light shielding rate of low-light-transmitting areas. By changing the color of each lens or introducing multiple colors into one lens depending on the light shielding rate, it can be further fashioned. Lenses with high performance and decorativeness can be provided.

  The lens of the present invention may be one in which a light control layer is formed on one surface of the lens and a light shielding layer is formed on the other surface. The light control layer is a layer that changes (adjusts) the light shielding rate of both the high light transmissive region and the low light transmissive region, and the light shielding layer increases the light shielding rate of the low light transmissive region relative to the high light transmissive region. It is a layer to do. By changing the light transmission performance including ultraviolet cut or infrared cut of the whole lens as a light control layer on a different surface from the light blocking layer that controls the light blocking rate of the high light transmitting region and the low light transmitting region, discoloration and polarization Such a function can be imparted to a lens in which a low light-transmitting region is formed around a high light-transmitting region, and a multifunctional lens can be provided.

  One of the different aspects of the present invention is spectacles having the spectacle lens and the spectacle frame to which the spectacle lens is attached. Obstruction glare light can be efficiently cut, and fashion and decoration are high, and it is possible to provide eyeglasses that users can use on a daily basis. Because it is highly fashionable, it can be used not only by general users but also to follow specific functional disorders, and can be used by a wide variety of users. However, it can be supplied at low cost.

The perspective view which looked at the spectacles which have spectacle lenses from the object side. The front view which looked at the spectacles which have spectacle lenses from the object side. The front view which looked at the spectacle lens from the object side. FIG. 4 is an IV-IV end view of the eyeglass lens shown in FIG. 3. (A) is the figure which showed distribution of the light shielding rate of the perpendicular direction of the light shielding layer shown in FIG. 4, (b) is the figure which showed distribution of the light shielding rate of the horizontal direction of the light shielding layer shown in FIG. The figure which showed the glare corresponding to a viewing angle. The figure which showed the relationship between a viewing angle and visual efficiency. The figure which showed how to obtain | require a viewing angle. The figure which showed the head position (eye position) movement at the time of target search. The figure which showed the area | region of the spectacle lens. (A) is the figure which showed typically the sensitivity of the image obtained from an eyeball in the state of a naked eye, (b) is typically the sensitivity of the image obtained from an eyeball in the state where the spectacle lens corresponding to a glare cut was mounted | worn. The figure shown. The front view of the spectacle lens sample used for the experiment of a glare cut effect. The figure which showed the contrast sensitivity in the bright room of the spectacle lens shown in FIG. The figure which showed the different contrast sensitivity in the bright room of the spectacle lens shown in FIG. The figure which showed the contrast sensitivity in the semi-dark room of the spectacle lens shown in FIG. The figure which showed the different contrast sensitivity in the semi-dark room of the spectacle lens shown in FIG. The figure which showed an example of dyeing | staining. (A) is the front view which looked at the spectacle lens which concerns on 2nd Embodiment from the object side, (b) shows distribution of the light shielding rate of the perpendicular direction of the light shielding layer of the spectacle lens which concerns on 2nd Embodiment. Figure. The front view which looked at the spectacle lens which concerns on 3rd Embodiment from the object side. (A) is the figure which showed distribution of the light shielding rate of the perpendicular direction of the light shielding layer of the spectacle lens which concerns on 4th Embodiment, (b) is the horizontal of the light shielding layer of the spectacle lens which concerns on 4th Embodiment. The figure which showed distribution of the light-shielding rate of a direction. (A) is the figure which showed distribution of the light shielding rate of the perpendicular direction of the light shielding layer of the spectacle lens which concerns on 5th Embodiment, (b) is the horizontal of the light shielding layer of the spectacle lens which concerns on 5th Embodiment. The figure which showed distribution of the light-shielding rate of a direction. (A) is the figure which showed distribution of the light shielding rate of the perpendicular direction of the light shielding layer of the spectacle lens which concerns on 6th Embodiment, (b) is the horizontal of the light shielding layer of the spectacle lens which concerns on 6th Embodiment. The figure which showed distribution of the light-shielding rate of a direction. (A) is the figure which showed distribution of the light shielding rate of the perpendicular direction of the light shielding layer of the spectacle lens which concerns on 7th Embodiment, (b) is the horizontal of the light shielding layer of the spectacle lens which concerns on 7th Embodiment. The figure which showed distribution of the light-shielding rate of a direction. (A) is the figure which showed distribution of the light shielding rate of the perpendicular direction of the light shielding layer of the spectacle lens which concerns on 8th Embodiment, (b) is the horizontal of the light shielding layer of the spectacle lens which concerns on 8th Embodiment. The figure which showed distribution of the light-shielding rate of a direction.

1. First Embodiment 1.1 Outline of Eyeglass Lens FIG. 1 is a perspective view of an eyeglass 1 having an eyeglass lens 10 according to the present invention as viewed from the object side. FIG. 2 is a front view of the eyeglasses 1 having the eyeglass lens 10 according to the present invention as viewed from the object side. The spectacles 1 includes a pair of left and right oval spectacle lenses 10 and a spectacle frame 9 to which the spectacle lenses 10 are attached. The spectacle lens 10 includes a highly transmissive region 12 including an eye point (eye position when wearing spectacles, pupil center position, fitting point) 11, and three directions on the upper and lower sides and the ear side of the highly transmissive region 12. And a low light-transmitting region 14 provided so as to surround. The low light transmissive region 14 includes a region (gradient region, gradation region) 16 having a higher light shielding rate than the high light transmissive region 12 and increases toward the periphery 15. This spectacle lens 10 forms a gradient region 16 from the high light-transmitting region 12 to the low light-transmitting region 14 by gradually increasing the color density (shading) of the back surface (eyeball side surface) 10b. Yes.

  FIG. 3 shows a front view of the eyeglass lens 10 for the user's left eye (hereinafter, left and right indicate directions as viewed from the user wearing glasses unless otherwise specified). . FIG. 4 shows a schematic configuration of the left eyeglass lens 10 in an end view in the vertical direction (IV-IV end face in FIG. 3). In FIG. 3, for the sake of explanation, the spectacle lens 10 is surrounded by a highly translucent region 12 including the eye point 11, and an upper side 18 c, a lower side 18 d, and an ear side 18 b of the highly translucent region 12. The boundary 13 with the low translucency area | region 14 provided in is shown with the broken line. In this example, the gradient region 16 whose light shielding rate increases toward the periphery 15 is provided adjacent to the boundary 13. Therefore, the light blocking ratio smoothly changes at the boundary 13 between the high light-transmissive region 12 and the low light-transmissive region 14, and the boundary 13 indicated by a broken line indicates that the eyeglasses 1 from the outside when the glasses 1 are worn. The person who has seen the image and the user wearing the glasses 1 are hardly conscious or noticeable.

  Further, the spectacle lens 10 has an inverted C-shaped gradient region as viewed from the object side, in which the density (shading) of the color of the lens is gradually increased from the high light-transmissive region 12 to the low light-transmissive region 14. 16 is a spectacle lens with a novel design. That is, in the spectacle lens 10, the eye point 11 that is the center of the high light-transmissive region 12 is shifted to the nose side 18 a with respect to the geometric center 19 of the spectacle lens 10. The low light-transmitting region 14 is recognized as an ellipse or circle having a large diameter around the geometric center (intersection of the major axis and the minor axis) 19 of the lens, and the high light-transmitting region 12 has the eye point 11 as the center. The lens periphery 10e, which is recognized as an ellipse or circle having a small diameter at the center, is around or touches the boundary 13 between the high light-transmissive region 12 and the low light-transmissive region 14. A part of the nose side 18a of the low light-transmitting region 14 is cut off, and the low light-transmitting region 14 has a C shape (reverse C shape) in which the nose side 18a is cut as a whole. Design. In the present specification, unless otherwise specified, the C shape is an inverted C shape with the nose side 18a cut, a C shape with the ear side 18b cut, a C shape with the upper side 18c cut, Including the C-shape with the lower side 18d cut.

  Further, in the spectacle lens 10, there is no clear boundary between the high light-transmissive region 12 and the low light-transmissive region 14. Therefore, by wearing the spectacle lens 10, the glare cut effect described below can be obtained, and it is possible to suppress a sense of incongruity in the field of view. Therefore, the eyeglass lens 10 is rich in fashion and can be used more casually by ordinary users or users with disabilities without feeling resistance in daily life. The eyeglass lens 10 is also viewed from the rear surface (eyeball side surface) 10b side, as seen from the front surface (object side surface) 10a (although it may be symmetric). It is recognized as the design shown in FIG.

  The spectacle lens 10 includes a light shielding layer 20 whose light shielding rate changes on the back surface 41b of the lens base material 41, that is, the eyeball 101 side, and a light control layer 30 on the front surface 41a of the lens base material 41, that is, the object side. Have. The light control layer 30 formed on the object-side surface (front surface) 10a of the spectacle lens 10 is a layer having a light control function (photochromic function) that changes color when irradiated with light including ultraviolet rays, and is a liquid having a light control function. It is manufactured by applying (coating liquid). Such a coding solution includes a photochromic compound, a radical polymerizable monomer, and an amine compound, and the radical polymerizable monomer has a silanol group or a group that generates a silanol group by hydrolysis. Can be included. The light control layer 30 is a layer that changes (adjusts) both the light shielding rates of the high light-transmissive region 12 and the low light-transmissive region 14 of the spectacle lens 10. An example of the light control layer 30 is that the light blocking ratio varies depending on the intensity of ultraviolet rays, and visible light (460 to 600 nm, preferably 400 to 760 nm) is cut within a range of 0% to 50%, and near ultraviolet light (310 to 400 nm). In the range of 0% to 90%, more preferably 0% to 100%.

  The light shielding layer 20 in which the light shielding rate of the back surface 10b of the spectacle lens 10 (the surface on the eyeball 101 side) changes is formed by changing the dyeing density of the hard coat layer 43 that can be dyed. The light-shielding layer 20 forms a high light-transmissive region 12 and a low light-transmissive region 14 including a gradient region 16 having a high light-shielding rate with respect to the high light-transmissive region 12.

  FIG. 5A shows a dyed state with respect to a vertical viewing angle (vertical viewing angle) θy including the eye point 11 by extracting the hard coat layer 43 (light shielding layer 20) of the eyeglass lens 10 for the left eye. . FIG. 5B shows the dyeing state for the horizontal viewing angle (horizontal viewing angle) θx including the eye point 11 by extracting the hard coat layer 43 (light shielding layer 20) of the eyeglass lens 10 for the left eye. .

  Specifically, as shown in FIG. 5 (a), the vertical viewing angle θy (described below) of the hard coat layer 43 is not stained in the range of 0 to 15 degrees with respect to the eye point 11, No increase in the light shielding rate by the hard coat layer 43 is attempted, and the light shielding rate is basically 0%. When the vertical viewing angle θy of the hard coat layer 43 is in the range of 15 degrees to 30 degrees, the light shielding rate is dyed so as to gradually change from 0% to 30% almost in proportion to the vertical viewing angle θy. Note that the viewing angle θ, the vertical viewing angle θy, and the horizontal viewing angle θx include viewing angles in the plus direction and the minus direction centered on the eye point 11 unless otherwise specified. Further, the description of the viewing angle θ indicates a feature common to the vertical viewing angle θy and the horizontal viewing angle θx unless otherwise specified. Further, in this specification, the light shielding rate of 0% indicates that the light shielding rate is not increased by staining or the like, and light absorption by the lens base 41 and the other layers 42 to 45 is taken into consideration. Not done. Therefore, light absorption (attenuation) may be recognized by the spectacle lens 10 even if the light shielding rate is described as 0% in this specification due to light absorption by the lens base 41 and the other layers 42 to 45. is there.

  On the other hand, as shown in FIG. 5 (b), the horizontal viewing angle θx (described below) of the hard coat layer 43 is in the range of 0 to 20 degrees on the nose side 18a and the ear side 18b with the eye point 11 as the center. It is not dye | stained and the light-shielding rate by the hard-coat layer 43 is 0%. When the horizontal viewing angle θx of the hard coat layer 43 is in the range of 20 degrees to 40 degrees in the direction of the ear side 18b, the light shielding rate is gradually changed from 0% to 40% almost in proportion to the horizontal viewing angle θx. Has been. When the horizontal viewing angle θx of the hard coat layer 43 is in the range of 40 degrees or more in the direction of the ear side 18b, the hard coat layer 43 is dyed so that the light shielding rate is 40%. The nose side 18a of the spectacle lens 10 has only a horizontal viewing angle θx in the range of 0 degrees to 20 degrees, and the nose side 18a of the spectacle lens 10 is the high light-transmitting region 12 as a whole.

  Therefore, in the spectacle lens 10, the vertical viewing angle θy is 15 degrees or less and the horizontal viewing angle θx is 20 degrees or less in the highly transmissive region 12, and the vertical viewing angle θy exceeds 15 degrees and the horizontal viewing angle. The range where θx exceeds 20 degrees in the direction of the ear side 18b is a low light-transmissive region 14, and the vertical viewing angle θy exceeds 15 degrees and the horizontal viewing angle θx ranges from 20 degrees to 40 degrees in the direction of the ear side 18b. Region 16 may be used.

  As shown in FIG. 4, in the spectacle lens 10, a primer layer 42, a hard coat layer 43, an antireflection layer 44, and an antifouling layer 45 are laminated on the back surface 41 b of the lens base material 41 from the lens base material 41. The hard coat layer 43 becomes the dyed layer (light shielding layer) 20 and controls the light shielding rate depending on the location (viewing angle) of the spectacle lens 10. A primer layer 42, a hard coat layer 43, an antireflection layer 44, a light control layer 30, and an antifouling layer 45 are laminated on the front surface 41 a of the lens base material 41 from the lens base material 41. The shading rate is controlled according to the time of use or location. It is also possible to provide the dyeing layer 20 on the front surface 10a side and the light control layer 30 on the back surface 10b side. However, in order for the light control layer 30 to be discolored with high sensitivity by the ultraviolet light, the light control layer is on the side of the front surface 10a that is more easily exposed to the ultraviolet light than the side of the back surface 10b that is easily absorbed by the lens substrate 41 or other layers. 30 is desirable. In addition, the manufacturing method of this spectacle lens 10 is further demonstrated below.

1.2 Glare Cut Effect of Eyeglass Lens Having High Translucent Area and Low Translucent Area FIG. 6 shows glare (glare) corresponding to the viewing angle. FIG. 7 shows the relationship between the viewing angle and the visual efficiency (easy to see). FIG. 8 shows how to obtain the viewing angle. As shown in FIG. 8, the viewing angle θ (vertical viewing angle θy, horizontal viewing angle θx) with respect to the visual axis (line passing through the eye point 11) 105 of the eyeball 101 depends on the spectacle wearing distance L and the viewing width Fw as follows. It is calculated | required by Formula (1).
θ = tan ⁻¹ (Fw / L) (1)

  The visual field width Fw indicates the distance from the eye point 11 of the spectacle lens 10. The design of the spectacle lens 10 as shown in FIGS. 1 to 3 mainly has a pattern that changes with the eye point 11 as one center. Therefore, the design is determined mainly by the distance from the eye point 11. The spectacle wearing distance L is approximately constant at approximately 25 mm. Therefore, the design of the spectacle lens 10 can be defined by the viewing angle θ (vertical viewing angle θy, horizontal viewing angle θx). For example, a viewing width Fw of 4 mm corresponds to a viewing angle θ of about 9 degrees. Therefore, in the following, the relationship between the design attached to the spectacle lens 10 and the glare cut will be described using the viewing angle θ. In the following, the viewing angle θ (vertical viewing angle θy, horizontal viewing angle θx) means an absolute value or a half apex angle of a cone unless otherwise specified, and corresponds to a solid angle. Therefore, the viewing angle θ represents ± θ in the horizontal or vertical (vertical) direction with respect to the visual axis 105.

  FIG. 6 shows that the appearance of the object 102 decreases when there is strong light (light source) 103 at a certain angle (glare angle) φ with respect to the gaze line (0-degree line in the drawing, visual axis) 105. Is expressed as a value converted to a decrease in illuminance. FIG. 7 shows a decrease in visibility (decrease in illuminance) as a decrease in visual efficiency with respect to the glare angle φ. As shown in FIG. 6, the visual efficiency (easy to see) changes depending on the glare angle φ with respect to the target (object) 102, but it can be seen that if the light source 103 is in the field of view, glare occurs and the visual efficiency decreases. As light (glare light) incident on the eyeball 101 as a whole moves away from the visual target (object) 102, glare (glare) is gradually relaxed and visual efficiency (easy to see) improves.

  Such glare (dazzle, dazzle) leads to discomfort or impaired visual function due to excessive brightness or excessive brightness contrast, and is classified as discomfort glare and impaired glare (degraded glare). The reduction in visual efficiency due to the glare having a glare angle φ of 20 degrees or less is substantially over 50%, and the object 102 is difficult to discriminate. Therefore, the user feels uncomfortable, and the human being moves the eyeball 101 almost unconsciously, moves the head, changes the posture, etc., and glare light enters at least the range (glare angle φ is 20 degrees). Do not. Such glare light is referred to as unpleasant glare light 51. “Unpleasant glare” refers to a state in which the user feels uncomfortable when there is a significant difference in luminance between adjacent parts in the field of view, or when the amount of light incident on the eye suddenly increases.

  On the other hand, the decrease in visual efficiency due to the glare light in the case where the glare angle φ is in the range of 20 degrees to 40 degrees is approximately within 50%. Therefore, the glare light in this angular range is gentle or soft glare light that does not cause extreme discomfort. However, the visual efficiency decreases. For this reason, the glare light in this angular range is called fault glare light (degraded glare light) 52. With regard to the reduced glare light 52, it is considered that a decrease in contrast of the retinal image due to scattered light generated in the eye tissue, underexposure, inability to adapt to the retina, etc., lead to a decrease in visual acuity. Further, the reduced glare light 52 includes reflection glare that makes it difficult to read characters due to the reflected light on the printing surface.

  Therefore, in order to suppress a decrease in visual efficiency, the discomfort glare light 51 is quickly moved to at least the range of the reduced glare light 52 regardless of the direction of the light. It is desirable to secure a field of view. Further, it is desirable to ensure that a good field of view can be secured by cutting the influence of the degrading glare light 52 constantly and effectively. Cutting the reduced glare light 52 that continues to enter unintentionally if left untreated is effective not only for ensuring a visual field but also for preventing the eyeball, cornea and the like from being damaged. In addition, for cataract patients, light is scattered in a cloudy lens, so the contrast sensitivity is greatly reduced by glare light. For users with such eye diseases, the reduced glare light 52 is cut off. This is also effective for correcting vision.

  FIG. 9 shows an example of observing the head position (eye position) movement during target search. Some graphs shown in FIG. 9 indicate how much the head rotates in order to recognize a target (object) moved by an angle in the horizontal direction from the point of gaze. In a gaze state where attention is paid to the target (object), the head rotates with the object as shown in the graph 181. On the other hand, in a discriminating state where the target (object) is simply recognized, the movement of the head is about 10 degrees smaller than the angle (movement) of the object as shown in the graph 182. (Less). Based on this observation result, the limit of the range in which the object can be recognized by the movement of the eyeball can be set to about 10 degrees. Accordingly, a viewing angle θ within about 10 degrees can be set as a discrimination visual acuity region (an eyeball movement region during discrimination). Furthermore, in a free-view state in which the index (object) is roughly recognized, as shown in a graph 183, the angle (movement) of the object is about 15 degrees smaller (less). Therefore, a viewing angle θ within about 15 degrees can be set as a free visual acuity region (an eyeball movement region during free viewing).

  FIG. 10 shows several regions set in the spectacle lens 10 by the inventor of the present application based on the above consideration. A range in which the viewing angle θ of the spectacle lens 10 with respect to the visual axis 105 is within 10 degrees can be defined as a discrimination visual acuity region 91. As described above, when the viewing angle θ is within 10 degrees, the eyeball mainly moves for discrimination. Therefore, it is desirable that a clear field of view be obtained as much as possible in this range, and it is considered that it is desirable to obtain a clear field of view rather than cutting glare light except when ultraviolet rays are extremely strong.

  A range in which the viewing angle θ with respect to the visual axis 105 is within 20 degrees can be defined as an eye movement region 92. The eye movement region 92 includes a discrimination visual acuity region 91 and a free visual acuity region 95. Glare light with a glare angle φ of 20 degrees or less is unpleasant glare light 51, and if glare light is in a range where the viewing angle θ is 20 degrees or less, glare light in this range is expected to be avoided by eyeball or head movement. The Therefore, in a region where the viewing angle θ is 20 degrees or less, it is basically desirable to obtain a clear field of view, except when ultraviolet rays are extremely strong, rather than cutting or suppressing glare light. .

  On the other hand, the range in which the viewing angle θ is 10 degrees to 20 degrees exceeds the discrimination visual acuity area 91 and does not affect the visual perception as much as the discrimination visual acuity area 91. Further, the free visual acuity region 95 has a viewing angle θ of about 15 degrees or less, and when the viewing angle θ exceeds 15 degrees, the rate (ability) that contributes to a clear grasp of the object even if the object is captured in the field of view. Is a small area. Therefore, the range where the viewing angle θ is 10 degrees to 20 degrees is the intermediate region 96, and it is possible to achieve a clear view and cut or suppress glare light at a certain level or both. May be given priority. That is, the intermediate region 96 having a viewing angle θ of about 10 degrees to 20 degrees can flexibly set the function of the spectacle lens 10 depending on the user or application, and the intermediate region 96 has high design flexibility of the spectacle lens 10. It becomes an area.

  The range where the viewing angle θ with respect to the visual axis 105 is 20 degrees to 40 degrees is the glare cut region 93. As shown in FIGS. 6 and 7, the glare light in the region where the glare angle φ is 20 degrees or more is the obstacle glare light 52, and the glare light in this range may be unavoidable due to the movement of the eyeball or the head. is there. Further, glare light in this range leads to a decrease in visual efficiency. Therefore, in the glare cut region 93, it is desirable to give priority to cutting glare light rather than obtaining a clear view. On the other hand, considering the sensitivity distribution of the visual field and the distribution of photoreceptor cells on the retina, it is recognized that there is sufficient sensitivity even when the viewing angle θ is around 40 degrees, and the viewing angle θ is around 30 degrees. Sensitivity and photoreceptor distribution increase relatively rapidly. Therefore, when the light that completely enters the eyeball 101 is blocked when the viewing angle θ is in the range of 20 degrees to 40 degrees, the viewing sensitivity in that range is lost, and the function of the photoreceptor cell is not utilized. For this reason, in order to make use of the discrimination ability of the eyeball 101, it is desirable that a certain degree of field of view can be ensured while giving priority to cutting glare light up to a viewing angle θ of about 40 degrees.

  Further, when the viewing angle θ is in the range of 20 degrees to 30 degrees, the viewing sensitivity is relatively high and the photoreceptor distribution is also high. Therefore, the region 97 with the viewing angle θ of 20 degrees to 30 degrees is the glare cut region 93, but it is clear by reducing the shading rate and slightly lowering the glare cut with respect to the region where the viewing angle θ exceeds 30 degrees. It is also an effective area to obtain a visual field. Therefore, similarly to the intermediate region 96, the function of the spectacle lens 10 can be set flexibly according to the user or application, and the region 97 is a region with high design flexibility.

  The range of the viewing angle θ with respect to the visual axis 105 from 40 degrees to 45 degrees is an area that is processed to be put into a frame in most spectacle lenses 10, and is a frame area 94 of the spectacles 1. Therefore, the glare light in the frame region 94 is cut. As in the case of the spectacle lens 10 shown in FIG. 3, when the eye point 11 is close to the nose side (the spectacle frame center side) 18 a (shifted or shifted), the ear side 18 b of the spectacle lens 10. May cover a range of 40 degrees or more, for example, about 50 degrees or 55 degrees. In such a case, it is desirable to process the region where the horizontal viewing angle θx exceeds 40 degrees as the glare cut region 93 in order to secure the field of view. An area where the horizontal viewing angle θx exceeds 40 degrees may be an area having a higher light shielding rate than the glare cut area 93.

  Thus, in consideration of the realization of the function of glare cut, several functional areas can be set with a viewing angle θ centered on the visual axis 105 passing through the eye point 11. As described with reference to FIG. 8, the viewing area including the front surface 10a and the back surface 10b of the spectacle lens 10 can be defined by the viewing angle θ (vertical viewing angle θy, horizontal viewing angle θx). The region in which the function can be defined by θ is defined by a shape such as a C shape, a concentric circle, a concentric ellipse, or a donut shape around the eye point 11 in the visual field region of the spectacle lens 10. In the following, the visual field region may be described only by the front surface 10a or the back surface 10b. Accordingly, it is possible to associate the C-shaped and donut-shaped design seen on the surface 10a of the spectacle lens 10 shown in FIGS. 1 to 3 with the function of glare cut, and the glare cut function and a novel design. It is possible to provide the spectacle lens 10 combined with the above.

  FIG. 11 is a diagram schematically showing the effect of cutting the reduced glare light 52. FIG. 11A schematically shows the sensitivity of an image obtained from the eyeball 101 in a naked eye state (a state in which no glare cut is performed). Glare light (degraded glare light) 107b is incident on the eyeball 101 together with a light beam 107a from the object being watched. The glare light 107 b is imaged by the retina 106 or irregularly reflected by the crystalline lens 109.

  FIG. 11B schematically shows the sensitivity of an image obtained from the eyeball 101 in a state where the spectacle lens 10 corresponding to glare cut is attached in front of the eyeball 101. The spectacle lens 10 includes a high light-transmitting region 12 centered on the eye point 11 and a low light-transmitting region 14 having a high light-shielding property formed around it. Accordingly, the light beam 107a from the object being watched enters the eyeball 101 in the same manner as the naked eye, but the intensity of the glare light (degraded glare light) 107b is significantly reduced by the low light-transmitting region 14. For this reason, the glare light 107b hardly forms an image on the retina 106, and the possibility of irregular reflection on the crystalline lens 109 is small. For this reason, it is considered that the contrast sensitivity of the image recognized through the retina 106 is improved. By suppressing the brightness (stimulus) of the surrounding image, the weak sensitive part adjacent to the high sensitive part is weaker, and the high sensitive part adjacent to the weak sensitive part is more strongly stimulated so that the object looks sharp. It may be called a side (direction) suppression effect.

1.3 Experiment of Glare Cut Effect FIG. 12 shows a spectacle lens sample 110 used for an experiment of glare cut effect. The spectacle lens sample 110 includes a transparent region 112 corresponding to the high light-transmitting region 12 at the center of the lens, and an opaque region 114 corresponding to the low light-transmitting region 14 at the periphery surrounding the upper, lower, left, and right sides thereof. . Specifically, the spectacle lens sample 110 is an opaque member as a whole, and a transparent region 112 having an opening of ± 5 mm above and below about the eye point (pupil center position) 111 and ± 4 mm left and right at the center of the lens. Have. The size of the transparent region 112 corresponds to a vertical viewing angle θy of ± about 11 degrees and a horizontal viewing angle θx of ± about 9 degrees.

  FIGS. 13 to 16 show the results of comparative experiments for contrast sensitivity performed on two subjects with the spectacle lens sample 110 and the spectacle lens sample (comparative lens sample) that are completely colorless and exchanged and mounted. ing. The result of wearing the spectacle lens sample 110 is shown by a solid line as a glare cut, and the result of wearing the comparative lens sample is shown by a broken line as a comparison. The horizontal axis of each figure shows the spatial frequency (cpd, Cycle Per Degree). The spatial frequency is a value indicating how many sets of bright and dark (black and white) stripe patterns per unit viewing angle, and cpd indicates how many black and white pairs exist within a range of 1 degree angle. The vertical axis of each figure shows the contrast sensitivity, and shows how much contrast the subject felt with each stripe (monochrome pair).

  The subjects were two men, a 55-year-old male A and a 50-year-old male B. For measurement, a contrast sensitivity measuring device CSV-1000 with a glare manufactured by Vector Vision was used, and the measurement distance was set to 2 m.

  13 and 14 show measurement results in a bright room without glare light. Even in the absence of glare light, it was found that the contrast sensitivity was improved by using the spectacle lens sample (glare cut sample) 110 at a low frequency (spatial frequency band from 3 cpd to 6 cpd).

  15 and 16 show measurement results in a semi-dark room with glare light. Although there is a difference in tendency between male A and male B, the result that the contrast sensitivity is improved by using the glare cut sample 110 in a wide spatial frequency band of approximately 3 cpd to 18 cpd was obtained. Therefore, wearing the glare cut sample 110 may improve the contrast sensitivity even in the absence of glare light. If there is glare light, installing the glare cut sample 110 improves contrast sensitivity in a wide frequency band. I found out that

  The spectacle lens 10 shown in FIGS. 1 to 4 is a spectacle lens having a design in which the light shielding rate changes around the eye point 11, and includes a highly translucent region 12 centered on the eye point 11 and an upper side 18 c thereof. And a low light-transmitting region 14 surrounding three sides of the lower side 18d and the ear side 18b. In the spectacle lens 10, the low light-transmitting region 14 on the nose side 18 a is cut or the area of the glare cut sample 110 is small, so that the glare cut function on the nose side 18 a may be partially reduced. There is. However, it is considered that an improvement in contrast sensitivity that is substantially the same as or close to that described above can be obtained by cutting at least three glare lights. Further, the nose side 18a often has a low sensitivity to glare because the nose itself becomes a barrier, and the spectacle lens 10 has a sufficient glare cut function, which is considered to be effective in improving contrast sensitivity.

  Further, the spectacle lens 10 shown in FIGS. 1 to 4 has a design including a gradient region 16 in which the density (shading) of the lens color is gradually increased from the high light-transmitting region 12 to the low light-transmitting region 14. It is adopted, and a clear boundary does not occur between the high light-transmissive region 12 and the low light-transmissive region 14. Therefore, since the density (shading) of the color of the lens gradually changes throughout the spectacle lens 10, it is possible to prevent a sense of incongruity from occurring in the field of view. At the same time, the eyeglass lens 10 is fashionable and can be used easily. For this reason, the spectacles 1 including the spectacle lens 10 can be worn by general users as an item having a function in fashion, and a user with a disability can wear it without feeling resistance in daily life.

  In the spectacle lens 10, the light shielding rate of the low light-transmitting region 14 is stopped at about 40% in the peripheral portion of the spectacle lens 10 (about 90% by the function of the light control layer 30 when ultraviolet rays are strong). A certain degree of translucency is secured at night and indoors. Therefore, glare light is cut to some extent in the low light-transmitting region 14, but the visual field sensitivity of the eyeball 101 and photoreceptor cells are utilized as much as possible without completely hiding the field of view of the low light-transmitting region 14, and a wide field of view is obtained. It is like that.

  Further, the gradient area 16 not only improves the design, but also gradually increases the shading rate from the eye point 11 toward the periphery (outside), thereby reducing the reduction glare light 52 and providing a clear view. We are trying to achieve both. Therefore, in this respect as well, it is possible to provide the spectacle lens 10 having a wide field of view and capable of suppressing the influence of glare light. Further, when the clear field of view and the glare cut are in a trade-off relationship, the gradient region 16 and the low light-transmitting region 14 are located on the upper side 18c of the high light-transmitting region (bright region) 12 with respect to the eye point 11. The lower side 18d and the ear side 18b are provided so as to surround the three sides, so that the user can easily realize the conditions most easily seen by the minimum eyeball and head movements.

  Since the gradient region 16 and the low light-transmitting region 14 can basically cut glare light, the gradient region 16 and the low light-transmissive region 14 are effective not only for the reduction glare light 52 but also for the unpleasant glare light 51. Further, since the gradient region 16 and the low light-transmitting region 14 are provided in three directions of the upper side 18c, the lower side 18d, and the ear side 18b of the eye point 11, the visual axis 105 in any direction except the nose side 18a. The glare light can be cut by moving. Therefore, even with respect to the discomfort glare light 51, the discomfort glare light 51 can be moved to the range of the reduced glare light 52 by moving the eyeball or the head in the direction in which the movement of the visual axis 105 is minimized. The influence can be suppressed.

  Thus, the spectacle lens 10 is excellent in both function and design, and can be used by a wide variety of users. Therefore, the marketability of the spectacle lens 10 is high, and there is a possibility that it can be manufactured at a low cost. For this reason, it can be supplied to users with functional impairments at low cost, can be used easily by anyone, is easy to use, has a high degree of freedom in use, and can be used easily. The glasses 1 can be provided.

  Further, the spectacle lens 10 includes a light control layer 30. For this reason, since the light control layer 30 senses light (ultraviolet rays) and changes its color to a dark color such as black outdoors in the daytime, the light shielding rate of the high light-transmissive region 12 is not limited to the low light-transmissive region 14. Can be high. Therefore, an ultraviolet cut function and a glare cut function can be imparted including the highly translucent region 12. Further, in the spectacle lens 10 in which the color change by the light control layer 30 is mainly for the dyeing of the hard coat layer 43, the spectacle lens 10 as a whole looks dark and is almost a single color lens outdoors in the daytime. Indoors, it is also possible to provide a spectacle lens 10 whose design changes depending on the time and place where a C-shaped pattern applied by dyeing the hard coat layer 43 can be seen. Therefore, the spectacle lens 10 has functions such as overall color change and polarization, and a glare cut function depending on the viewing angle, and is used at various times and places as a spectacle 1 having a highly decorative design. It is possible to provide the spectacle lens 10 and the spectacles 1 that can be used.

  In this spectacle lens 10, in order to cover the discrimination visual acuity region 91, when the viewing angle θ is in the range of at least 10 degrees (for example, when the spectacle wearing distance L is 25 mm (and so on)), It is preferable that the radius is in the range of 4 to 5 mm). In consideration of the free vision region 95, the high light-transmissive region 12 may have a viewing angle θ in a range of at least 15 degrees (a radius from the eye point 11 of 6.5 to 7.5 mm). Including the intermediate region 96, the viewing angle θ may be in the range of at least 20 degrees (the radius from the eye point 11 is in the range of 8.5 to 9.5 mm). In the highly light-transmissive region 12, the total light blocking ratio including the visible light region and the near ultraviolet light region or the near infrared light region is preferably 95% or less. The total light blocking ratio may be realized by dyeing the hard coat layer 43 or may be realized in combination with the light control layer 30. In terms of ensuring a clear field of view, the total light blocking ratio is desirably 90% or less, more preferably 80% or less, and even more preferably 70% or less. . Further, the total light shielding ratio of the high light-transmissive region 12 is preferably 0% or more. For a user who desires to cut the design and the constant light, the total light shielding ratio is 5% or more. Alternatively, the total light blocking ratio may be 10% or more.

  In consideration of the glare cut region 93, the low light-transmitting region 14 is preferably in a range in which the viewing angle θ exceeds 20 degrees (a range in which the radius from the eye point 11 exceeds 8.5 to 9.5 mm). In consideration of the visual acuity region 95, the visual field angle θ may be in a range exceeding 15 degrees (a range in which the radius from the eye point 11 exceeds 6.5 to 7.5 mm), and the visual field does not include the discriminating visual acuity region 91. The range where the angle θ exceeds 10 degrees (the range where the radius from the eye point 11 exceeds 4 to 5 mm) may be used. In the low light-transmissive region 14, the outside of the gradient region 16, for example, a range in which the viewing angle θ exceeds 40 degrees (a range in which the radius from the eye point 11 exceeds 20.5 to 21.5 mm) or a range exceeding 30 degrees ( When glare cut is prioritized in a range in which the radius from the eye point 11 exceeds 14 to 15 mm, the total light blocking ratio including the visible light region and the near ultraviolet light region or the near infrared light region may be 100%. In consideration of ensuring, it is preferable that the total light blocking ratio is 95% or less. The total light blocking ratio of the low light transmissive region 14 may be realized by dyeing the hard coat layer 43 similarly to the high light transmissive region 12, or may be realized by a combination with the light control layer 30. In terms of ensuring a clear field of view, the total light blocking ratio is desirably 90% or less, more preferably 80% or less, and even more preferably 70% or less. . Further, the total light blocking ratio of the low light-transmitting region 14 is preferably 10% or more, more preferably 20% or more, and more preferably 30% or more in order to glare cut at least outside the gradient region 16. It is even more preferable.

1.4 Manufacturing Method 1.4.1 Manufacturing of Lens Body An example of a manufacturing method of the spectacle lens 10 described above will be described. In this example, an example will be described in which the spectacle lens 10 capable of dyeing the hard coat layer 43 after being laminated up to the antireflection layer 44 and the antifouling layer (water repellent layer) 45 is manufactured and then donut-like dyeing is performed. The spectacle lens 10 capable of dyeing the hard coat layer 43 after being laminated up to the antireflection layer 44 and the antifouling layer (water repellent layer) 45 is described in detail in Japanese Patent Application Laid-Open No. 2006-139247, filed by the present applicant. ing.

  The spectacle lens 10 according to the present invention has a configuration as shown in FIG. First, a lens substrate 41 having desired optical performance is formed using, for example, a Seiko super sovereign lens fabric (SSV) manufactured by Seiko Epson Corporation.

  Next, primer layers (underlying layers) 42 that improve the adhesion between the lens base material 41 and the hard coat layer 43 are formed on both surfaces of the plastic lens base material 41 by a dipping method. The coating liquid P1 for forming the primer layer 42 is, for example, 100 parts of a commercially available polyester resin “Pesresin A-160P” (manufactured by Takamatsu Resin Co., Ltd., water-dispersed emulsion, solid content concentration: 27%) with rutile oxidation. 84 parts of titanium composite sol (trade name Optray 1120Z, manufactured by Catalytic Chemical Industry Co., Ltd.), 640 parts of methyl alcohol as a diluting solvent, silicone surfactant as a leveling agent (trade name “manufactured by Nippon Unicar Co., Ltd. SILWET L-77 ") 1 part is mixed and prepared by stirring until uniform. The coating liquid P1 is applied to both surfaces of the lens base material 41 by a dipping method (pulling speed of 15 cm per minute), and the lens base material 41 after application is air-dried at 80 ° C. for 20 minutes to form a primer layer 42. To do. The solid content after firing of the primer layer 42 formed by the coating liquid P1 includes 62% by weight of a polyester resin and 38% by weight of a rutile-type titanium oxide composite sol.

  On the surface of the lens base material 41 on which the primer layer 42 is laminated, a hard coat layer 43 that is a hard coat layer that improves the surface hardness of the plastic lens base material 41 that is more easily damaged than glass and has a dyeability. Form. The coating liquid H1 for forming the hard coat layer 43 is, for example, after mixing 138 parts of propylene glycol methyl ether and 688 parts of a rutile-type titanium oxide composite sol (product name: OPTRAIK 1120Z, manufactured by Catalyst Chemical Industry Co., Ltd.). , Γ-glycidoxypropyltrimethoxysilane (106 parts) and glycerol polyglycidyl ether (manufactured by Nagase Kasei Kogyo Co., Ltd., trade name Denacol EX313) were mixed with 30 parts of 0.1N hydrochloric acid aqueous solution. Is added dropwise with stirring, and the mixture is further stirred for 4 hours and then aged for a whole day and night. Thereafter, 1.8 parts of Fe (III) acetylacetonate and 0.3 parts of a silicone-based surfactant (manufactured by Nippon Unicar Co., Ltd., trade name L-7001) are added to this mixed solution. This coating liquid H1 is applied to the surface of the primer layer 42 by a dipping method (pulling speed of 35 cm / min), and the lens substrate 41 after coating is air-dried at 80 ° C. for 30 minutes, and further baked at 120 ° C. for 120 minutes. To form a hard coat layer 43 having a thickness of 2.3 μm. The formed hard coat layer 43 sufficiently contains glycerol polyglycidyl ether, which is a polyfunctional epoxy compound, and is a hard coat layer that can be dyed. The solid content after firing of the hard coat layer 43 formed by the coating liquid H1 is 55% by weight of metal oxide fine particles (rutile-type titanium oxide composite sol) and 30% by weight of organosilicon (γ-glycidoxypropyl). Trimethoxysilane) and 15% by weight of a polyfunctional epoxy compound (glycerol polyglycidyl ether).

  On the surface of the lens base material 41 on which the hard coat layer 43 is laminated, an antireflection layer 44 for preventing light surface reflection is formed. The coating liquid (low bending liquid) AR1 for forming the antireflection layer 44 is, for example, 13 parts of 0.1N hydrochloric acid aqueous solution mixed with 14 parts of γ-glycidoxypropyltrimethoxysilane and 15 parts of tetramethoxysilane. Was added dropwise with stirring, and further stirred for 4 hours, and then aged for a whole day and night. To a mixed solution, 878 parts of propylene glycol methyl ether, 80 parts of hollow silica sol (manufactured by Catalyst Kasei Kogyo Co., Ltd., trade name Oscar special product), It is prepared by adding 0.04 part of magnesium perchlorate and 0.3 part of a silicone surfactant (manufactured by Nihon Unicar Co., Ltd., trade name L-7001). After the surface of the lens substrate 41 (the surface of the hard coat layer 43) is hydrophilized by plasma treatment, this coating solution AR1 is applied to the surface of the hard coat layer 43 by a wet method (dipping method (pickup speed 15 cm / min)). The lens substrate 41 after coating is air-dried at 80 ° C. for 30 minutes, and further baked at 120 ° C. for 60 minutes to form a porous antireflection layer (low flexure film) 44 having a thickness of about 100 nm. Form. The solid content after baking of the antireflection layer 44 formed by the coating solution AR1 is 25% by weight of γ-glycidoxypropyltrimethoxysilane, 15% by weight of tetramethoxysilane, and 60% by weight of hollow silica sol. Is included. This liquid does not contain a polyfunctional epoxy compound (glycerol polyglycidyl ether).

  The surface of the lens substrate 41 on which the antireflection layer 44 is laminated is subjected to water repellency treatment with a fluorine-based silane compound to form the spectacle lens 10 provided with a water repellent film (antifouling layer) 45. In addition, on the surface 10a side of the spectacle lens 10, the light control layer 30 is formed by applying a liquid (coating liquid) having a light control function before the water repellent treatment. The coding solution having a light control function includes a photochromic compound, a radical polymerizable monomer, and an amine compound, and the radical polymerizable monomer has a silanol group or a group that generates a silanol group by hydrolysis. The thing containing a monomer can be mentioned.

1.4.2 Dyeing In this example, the spectacle lens 10 with a water repellent film produced in this way was immersed in a 94 ° C. disperse dye bath to produce a spectacle lens 10 having a desired pattern. As the disperse dye, for example, Seiko Plax Diamond Coat Dye Amber D can be used. The color and pattern can be changed by changing the dyeing agent.

  As shown in FIG. 17, a stain-repellent film 160a is formed on the entire surface (object side surface) 10a of the spectacle lens 10, and the vertical viewing angle θy is 25 degrees on the back surface (surface on the eyeball 101 side) 10b. The dye-repellent film 160b1 that covers the range of 30 degrees and has a distance or angle dependency on the permeability of the staining agent, and the vertical viewing angle θy covers the range of 0 to 25 degrees, and has no dependency on permeability. A combination with the dye-repellent film 160b2 is formed. As the dye-repellent film, a material having an anti-dyeing effect, for example, a mask or a masking sheet made of various pastes or water-impermeable materials can be used. By immersing in a disperse dye bath at 94 ° C. for 10 minutes, dyeing having an angle dependency is performed in a region where the vertical viewing angle θy of the hard coat layer 43 is 25 degrees to 30 degrees.

  After performing the first dyeing, next, the stain-repellent film 160b1 covering the back surface 10b of the spectacle lens 10 is covered with a distance or an angle to the permeability of the dyeing agent, which covers the range of the vertical viewing angle θy of 20 degrees to 25 degrees. 94 ° C. disperse dye bath by changing to a combination of the dye-repellent dye-repellent film 160b2 and the dye-repellent dye-repellent film 160b3 having a vertical viewing angle θ in the range of 0 to 20 degrees and having no dependency on permeability. Soak in for 10 minutes. As a result, the region where the vertical viewing angle θ of the hard coat layer 43 is 25 degrees or more is further stained, and the region where the vertical viewing angle θ is 20 degrees to 25 degrees is angle-dependently stained.

  Similarly, the dye-repellent films 160b2 and 160b3 that cover the back surface 10b of the spectacle lens 10 cover the range of the vertical viewing angle θ of 15 degrees to 20 degrees, and have a distance or angle dependency in dye permeability. The film 160b3 is changed to a combination of the dye-repellent dyeing film 160b4 that does not depend on permeability and covers the range of the vertical viewing angle θ of 0 to 15 degrees, and is immersed in a disperse dye bath at 94 ° C. for 10 minutes. . As a result, the region where the vertical viewing angle θ of the hard coat layer 43 is 20 degrees or more is further dyed, and the region having the vertical viewing angle θ of 15 degrees to 20 degrees is dyed with angle dependency. In the horizontal direction as well as in the vertical direction, dyeing is performed by combining a dye-repellent film having a distance or angle dependency on the permeability of the stain and a dye-repellent film having no dependency on the permeability according to the horizontal viewing angle θx. Do. In this manner, the spectacle lens 10 having the gradient region 16 in which the density (shading) of the lens color gradually increases from the high light-transmissive region 12 to the low light-transmissive region 14 can be manufactured and provided.

  Note that the gradient region 16 can be realized in a region where the color changes in multiple stages by dyeing the hard coat layer 43 in finer steps. Further, the dyeing or coloring of the spectacle lens is not limited to the above method, and the lens substrate 41 may be dyed, and a donut-like pattern is formed by applying a treatment liquid by an ink jet method or a spray method. Also good. A method for applying a treatment liquid to the surface of a lens using an inkjet method is described in, for example, Japanese Patent Application Laid-Open No. 2001-327908, which is an application of the present applicant.

1.5 Fashionability of a spectacle lens having a gradient region As described above, the spectacle lens 10 surrounds the upper side 18c, the lower side 18d, and the ear side 18b of the highly light-transmissive region 12. An area (gradient area) 16 in which the light shielding rate changes toward the periphery is provided, and a high-fashion spectacle lens 10 and glasses 1 with a new design in which the light shielding ratio changes in a C shape can be provided. That is, the change in the light blocking ratio can be applied to the lens as the change in the color density (shading) of the lens, and the eyeglass lens 10 having the change in the C-shaped color or the like has a new decoration and is rich in fashion. It is recognized as a spectacle lens 10. The control (adjustment) of the light shielding rate by the dyeing described above is an example, and the performance of the antireflection layer 44 is adjusted to control the light shielding rate by changing the reflectance (transmittance) or realized by a fine pattern or the like. The light shielding rate may be controlled by changing the aperture ratio, and in any case, the change in the light shielding rate is reflected in the eyeglass lens 10 as a visible change from the outside.

  Furthermore, the spectacle lens 10 includes a highly transmissive region 12 and a gradient region 16 provided so as to surround the upper side 18c, the lower side 18d, and the ear side 18b of the highly transmissive region 12. It has a low translucency region 14. For this reason, as described above, it is possible to secure a visual field (field of view) in the high light-transmissive region 12 and cut (shield) glare light in the low light-transmissive region 14. Accordingly, not only a user who has a disorder such as a cataract and it is desirable to assist the function with the glasses having the low light-transmitting region 14, a general user can obtain an image with high contrast by suppressing the influence of glare light. The eyeglasses 1 equipped with the eyeglass lens 10 can be worn as an item for suppressing eye fatigue or eye damage caused by strong visible light, near ultraviolet light, or near infrared light.

  In addition, the spectacle lens 10 is a region in which the light shielding ratio changes toward the periphery 15 so as to surround the upper side 18c, the lower side 18d, and the ear side 18b of the highly light-transmissive region 12 including the eye point 11 ( A gradient region 16 is provided. Although the position of the eye point 11 varies from user to user, there are generally users who are closer to the nose side (glasses frame center side) 18a than to the ear side (glasses frame outer side) 18b. For this reason, even for a user whose eye point 11 is close to the nose side (center side of the eyeglass frame) 18a, from the direction of the upper side 18c, the lower side 18d, and the ear side 18b of the highly translucent region 12 including the eye point 11. The incident glare light is shielded (cut) to enhance the antiglare effect and ensure a good field of view. Furthermore, the spectacle lens 10 includes a highly transmissive region 12 and a gradient region 16 provided so as to surround the upper side 18c, the lower side 18d, and the ear side 18b of the highly transmissive region 12. It has a low translucency region 14. For this reason, glare (glare) on the center side (nose side 18a) of the spectacle frame can be suppressed more than the lens in which the light shielding rate changes only in the direction away from the center of the spectacle frame in the horizontal direction (one direction). The spectacle lens 10 can provide a highly fashionable spectacle lens 10 having a novel design in which the light-shielding rate varies with a symmetric shape.

  Further, in the case of many users whose eye point 11 is close to the nose side 18a, the obstacle glare light 52 incident from a range in which the horizontal viewing angle θx exceeds 20 degrees in the direction of the nose side 18a (center side of the spectacle frame 9) There is a high possibility that the user's own nose and other obstacles can block (cut) the light. Moreover, although the low translucency area | region 14 is C-shaped and a part of nose side 18a has interrupted, since it is C-shaped, it is a low translucency area | region in the upper side 18c and the lower side 18d of the nose side 18a. 14 and the glare light from diagonally above and diagonally below the nose side 18a is designed to be cut efficiently.

  The fault glare light 52 incident from the range where the horizontal viewing angle θx exceeds 20 degrees in the direction of the ear side 18b (outside of the spectacle frame 9) may be incident unconsciously if left unattended, and the working efficiency may be significantly reduced. is there. For this reason, shielding the obstruction glare light 52 incident from the ear side 18b rather than the nose side 18a is important in suppressing the reduction in work efficiency. The spectacle lens 10 includes a high light-transmitting region 12 and a low-light region including a gradient region 16 provided so as to surround the upper light-transmitting region 12, the upper side 18 c, the lower side 18 d, and the ear side 18 b. Since it has the translucent area | region 14, the obstacle glare light 52 which continues incident from the ear | edge side 18b can be light-shielded (cut) effectively.

  Therefore, the spectacle lens 10 has an aesthetic effect (fashionability) and an antiglare effect on a single lens, and is a spectacle lens 10 that can be used more easily by general users and users with disabilities.

2. Second Embodiment FIG. 18A shows a spectacle lens 100a according to a second embodiment in a front view as viewed from the object side. FIG. 18B shows the distribution of the light shielding rate in the vertical direction including the eye point 11 realized by the light shielding layer 20 (hard coat layer 43). This spectacle lens 100a is composed of a highly translucent region 12 including an eye point 11, and four sides (all sides) including a nose side 18a in addition to an upper side 18c, a lower side 18d and an ear side 18b of the high translucency region 12. A low light-transmitting region 14 provided so as to surround the periphery), and the light-transmitting region 14 has a higher light blocking rate than the high light-transmitting region 12, and the light blocking rate increases toward the periphery 15. A region (gradient region) 16 is included. The broken line indicating the boundary 13 between the high light-transmissive region 12 and the low light-transmissive region 14 is a virtual line and does not actually appear. For example, when the range of the viewing angle θ of 10 degrees is set as the high light-transmissive region 12 in order to cover at least the discrimination visual acuity region 91, the area of the high light-transmissive region 12 is relative to the lens area. Narrows. For this reason, there is a possibility that the region of the nose side 18a of the high light-transmissive region 12 can be surrounded by the low light-transmissive region 14, and the upper side 18c, the lower side 18d, and the ear side 18b of the high light-transmissive region 12 The low light-transmissive region 14 can be provided so as to surround the four directions (the entire circumference) including the nose side 18a in the three directions.

  Therefore, in the spectacle lens 100a, the light shielding rate changes toward the periphery 15 so as to surround the four sides (the entire circumference) of the upper side 18c, the lower side 18d, the ear side 18b, and the nose side 18a of the highly light-transmissive region 12. A region (gradient region) 16 is provided. Therefore, even for a user whose eye point 11 has moved slightly from the nose side (glass frame center side) 18a to the ear side (glass frame outer side) 18b, the upper side 18c of the highly translucent region 12 including the eye point 11; The glare light that enters from the direction of the lower side 18d, the ear side 18b, and the nose side 18a can be blocked (cut) to enhance the antiglare effect and ensure a good visual field. Further, the spectacle lens 100a includes a high light-transmitting region 12 and a low light-transmitting region 14 including a gradient region 16 provided so as to surround the four directions (all circumferences) of the high light-transmitting region 12. Therefore, it is possible to provide a high-fashion spectacle lens 100a having a new design in which the light blocking ratio changes in a donut shape or a ring shape. The spectacle lens 100a can also be attached to the spectacle frame 9 as shown in FIGS. 1 and 2, and the spectacles 1 having both fashionability and a glare cut function can be provided. In the present embodiment and the following embodiments, portions common to the first embodiment are denoted by common reference numerals and description thereof is omitted.

  In the spectacle lens 100a, the high light-transmitting region 12 having almost no light blocking rate (for example, the light blocking rate is 0%) and having a high light transmitting property extends to a range where the viewing angle θ is 10 degrees. When the viewing angle θ is in the range of 10 degrees to 20 degrees, the shading rate gradually changes from 0% to 10% almost in proportion to the viewing angle θ, and the viewing angle θ of the hard coat layer 43 is 20 degrees to 30 degrees. The range is dyed so that the shading rate gradually changes from 10% to 40% in almost proportion to the viewing angle θ. In the range where the viewing angle θ is 30 degrees or more, it is dyed so that the light shielding rate is 40%. Therefore, the range in which the viewing angle θ is 10 degrees or less is the high light-transmissive region 12, the range in which the viewing angle θ exceeds 10 degrees is the low-light-transmissive region 14, and the range in which the viewing angle θ is 10 degrees to 30 degrees is the gradient region. 16 can be used.

  Also in the spectacle lens 100a, the light control layer 30 can be provided on the object side surface as in the first embodiment, and the entire spectacle lens 100a (by the color change of the light control layer 30 ( It is possible to control the shading rate of the entire area. Further, the light control layer 30 can be provided on a part of the spectacle lens 100 a or a region having a different color change rate can be provided. A combination of the light control layer 30 and the light shielding layer 20 dyed with the hard coat layer 43. Thus, it is possible to provide spectacle lenses 100a of various designs. Also in other spectacle lens embodiments described below, the light control layer 30 can be combined in the same manner as described above.

3. Third Embodiment FIG. 19 is a front view of a spectacle lens 100b according to a third embodiment viewed from the object side. The spectacle lens 100b is a progressive power lens, and includes a distance area 192f for viewing a relatively far distance, a near area 192n for viewing a relatively near area, a distance area 192f, and a near area 192n. And a region 192m where the refractive power continuously changes. The spectacle lens 100b is provided with a highly translucent area 12 with the center of the distance area 192f as the eye point 11, and the lower side 18d of the highly translucent area 12 passes through the area 192m and the near area 192n. Extends to a range including the center 11a. For this reason, the near-field region 192n formed on the lower side 18d of the distance region 192f extends to the periphery of the lens edge, but the spectacle lens 100b is formed of the highly translucent region 12 including the eye point 11. A low light-transmissive region 14 including a region (gradient region) 16 in which the light shielding rate changes toward the periphery 15 is provided so as to surround the upper side 18c, the nose side 18a, and the ear side 18b.

  Therefore, the spectacle lens 100b has the C-shaped low light-transmissive region 14 in which the lower side 18d is interrupted. For this reason, the low light transmissive region 14 blocks glare light incident from the direction of the upper side 18c, the nose side 18a, and the ear side 18b of the high light transmissive region 12 with the center of the distance region 192f as the eye point 11. Cut) and an anti-glare effect is obtained. Further, the near-use area 192n on the lower side 18d of the spectacle lens 100b has a wide high light-transmitting area 12, and a wide field of view can be secured. Moreover, although the low translucency area | region 14 is C-shaped and a part of lower side 18d is interrupted, since it is C-shaped, it has low translucency in the nose side 18a and the ear | edge side 18b of the lower side 18d. The area 14 is present, and the glare light from the oblique nose side 18a and the oblique ear side 18b on the lower side 18d is designed to be cut efficiently. Thus, the spectacle lens 100b has a high glare cut function and can secure a good field of view.

  The shape of the high light-transmitting region 12 is not limited to this example, and may be concentric around the eye point 11 that is the center of the distance region 192f, for example, concentric or elliptical, and progressive refraction. It is also possible to provide a spectacle lens with a design including a donut-like pattern that is not easily noticeable as a power lens.

  Thus, the present invention can also be applied to a progressive power lens. In particular, when the distance area 192f is used, sunlight or night illumination is likely to become the obstruction glare light 52. Therefore, in the spectacle lens 100b, the influence of the obstruction glare light 52 can be suppressed, and day / night discrimination ability can be reduced. Can be improved. Further, the spectacle lens in which the color and reflectance of the lens changes toward the periphery around the distance center (eye point) 11 of the progressive power lens is a new design, and can provide a spectacle lens 100b rich in fashion. .

4). Fourth Embodiment FIG. 20A shows a light shielding rate with respect to the viewing angle (vertical viewing angle) θy in the vertical direction including the eye point 11 of the light shielding layer 20 of the eyeglass lens 100c for the left eye according to the fourth embodiment. The distribution (change) is shown. FIG. 20B shows the distribution (change) of the light shielding rate with respect to the horizontal viewing angle (horizontal viewing angle) θx including the eye point 11 of the light shielding layer of the eyeglass lens 100c for the left eye according to the fourth embodiment. Show. The spectacle lens 100c also has a low translucency provided so as to surround a high translucency region 12 including the eye point 11, and an upper side 18c, a lower side 18d, and an ear side 18b of the high translucency region 12. The low light-transmitting region 14 includes a region (gradient region) 16 having a higher light blocking rate than the high light transmitting region 12 and the light blocking rate changing toward the periphery 15.

  However, in the spectacle lens 100c, the gradient region 16 of the low light-transmitting region 14 is gradually and relatively abruptly colored toward the periphery 15 in the vicinity 17 of the boundary 13 with the high light-transmitting region 12. A region 16a in which the color becomes dark and a region 16b in which the color gradually decreases toward the periphery 15 outside the region 16a. For this reason, the low light-transmissive region 14 of the spectacle lens 100c includes a gradient region 16a in which the light shielding rate increases toward the periphery 15 and a gradient region 16b in which the light shielding rate decreases toward the periphery 15 on the outer side. Including.

  For example, as shown in FIG. 20 (a), when the vertical viewing angle θy is in the range of 0 to 15 degrees, it is not stained, and the light shielding rate is 0%. When the vertical viewing angle θy is in the range of 15 degrees to 20 degrees, the light shielding rate increases from 0% to about 30%, forming the gradient region 16a. When the vertical viewing angle θy is in the range of 20 degrees to 30 degrees, the light shielding rate is reduced from 30% to 10% to form the gradient region 16b. On the other hand, as shown in FIG. 20B, the range where the horizontal viewing angle θx is 0 to 20 degrees is not stained, and the light shielding rate is 0%. When the horizontal viewing angle θx is in the range of 20 degrees to 30 degrees in the direction of the ear side 18b, the light shielding ratio increases from about 0% to about 30% to form the gradient region 16a. When the horizontal viewing angle θx is in the range of 30 ° to 50 ° in the direction of the ear side 18b, the light shielding rate is reduced from 30% to 10% to form the gradient region 16b.

  In the spectacle lens 100c, the boundary 13 between the high light-transmitting region 12 and the low light-transmitting region 14 is blurred by a gradient region 16a provided on the inner side, where the light shielding rate once increases toward the periphery. Further, it is possible to prevent a clear boundary from occurring between the high light-transmissive region 12 and the low light-transmissive region 14. In addition, since the gradient region 16a can design a portion where the density (shading) of the color of the lens is darker in a portion close to the highly light-transmissive region 12, the spectacle lens 100c having a design full of originality with an impact on the eyes can be formed. Can be provided.

  Further, in the gradient region 16b, the light shielding rate gradually decreases toward the periphery 15 as opposed to the above embodiment. As shown in FIG. 7, even in the case of the reduced glare light (failure glare light) 52, the smaller the glare angle φ, the lower the visual efficiency (easy to see), and the larger the glare angle φ, the more the glare light. The impact is reduced. Therefore, in terms of cutting the reduced glare light 52, the smaller the viewing angle θ (vertical viewing angle θy, horizontal viewing angle θx), the larger the light shielding ratio, and the viewing angle θ (vertical viewing angle θy, horizontal viewing angle θx). As the value increases, the light blocking ratio may decrease.

  As shown in FIG. 7, in the range of the degrading glare light 52, the visual efficiency improves in proportion to the glare angle φ. Therefore, in the gradient region 16b, the light blocking ratio for glare cutting may be reduced in proportion to the viewing angle θ (vertical viewing angle θy, horizontal viewing angle θx). For this reason, like the spectacle lens 100c shown in FIGS. 20A and 20B, the low light-transmissive region 14 includes a region 16b in which the density (shading) of the lens color decreases toward the periphery 15. The contrast sensitivity of the wearer can be ensured. In addition, a color change in a direction different from that of the above embodiment is preferable because even a change in the same C-shaped color can be recognized as a new design.

5). Fifth Embodiment FIG. 21A shows a light shielding ratio with respect to a vertical viewing angle (vertical viewing angle) θy including the eye point 11 of the light shielding layer 20 of the eyeglass lens 100d for the left eye according to the fifth embodiment. The distribution (change) is shown. FIG. 21B shows the distribution (change) of the light shielding rate with respect to the horizontal viewing angle (horizontal viewing angle) θx including the eye point 11 of the light shielding layer of the eyeglass lens 100d for the left eye according to the fifth embodiment. Show. The spectacle lens 100d also has a low translucency provided so as to surround a high translucency region 12 including the eye point 11 and an upper side 18c, a lower side 18d, and an ear side 18b of the high translucency region 12. The low light-transmitting region 14 includes a region (gradient region) 16 having a higher light blocking rate than the high light transmitting region 12 and the light blocking rate changing toward the periphery 15. The gradient region 16 of this example includes a region where the color density (shading) of the light shielding layer 20 changes in multiple stages.

  Specifically, as shown in FIG. 21A, the vertical gradient region 16 including the eye point 11 changes in two stages, and the vertical viewing angle θy is shielded in the range of 15 degrees to 25 degrees. A region 16c having a rate of 10% and a region 16d having a vertical viewing angle θy in the range of 25 degrees to 30 degrees and a light shielding rate of 20% are included. On the other hand, as shown in FIG. 21B, the horizontal gradient region 16 including the eye point 11 changes in three stages, and the horizontal viewing angle θx is 20 degrees to 30 degrees in the direction of the ear side 18b. A region 16c having a light shielding rate of 10% in the range, a region 16d having a horizontal viewing angle θx of 30 ° to 40 ° in the direction of the ear side 18b, and a region 16d having a light shielding rate of 20%, and the horizontal viewing angle θx of the ear side 18b. And a region 16e having a light shielding rate of 30% in a range of 40 degrees to 50 degrees in the direction.

  The boundary portion of each of the regions 16c to 16e of the gradient region 16 where the light shielding rate changes in multiple stages may be such that the light shielding rate changes in a step shape and the change in density appears as an edge in the design of the spectacle lens 100d. Further, the light shielding rate at the boundary portions of the regions 16c to 16e of the gradient region 16 may gradually change so that the edge of the spectacle lens 100d cannot be seen. The spectacle lens 100d of this example is designed so that the light shielding rate gradually increases at the boundary portions of the regions 16c to 16e where the light shielding rate changes in multiple stages.

  In this spectacle lens 100 d, the region 16 c with a low inner light shielding rate in the vertical direction substantially corresponds to the intermediate region 96 that gives priority to free vision, and the outer region 16 d gives priority to the prevention of the obstruction glare light 52 while the eyeball 101. This substantially corresponds to the region 97 in which the visual field sensitivity is to be effectively utilized. On the other hand, the region 16c having a low inner light shielding rate in the horizontal direction corresponds to the region 97 in which the visual field sensitivity of the eyeball 101 is to be effectively utilized while giving priority to the prevention of the obstacle glare light 52, the outer region 16d and further The outer region 16e corresponds to a glare cut region 93 that prioritizes the cut of the obstacle glare light 52.

  The gradient region 16 in which the light blocking ratio changes in multiple stages can be manufactured not only by changing the shade of the color of the lens by staining, but also by changing the color itself or changing the reflectance. Therefore, it is possible to provide a change in hue for each of the multi-stage areas, and further, the range of design selection can be expanded, so that fashionability can be further improved, and a spectacle lens 100d having high value as a decoration can be provided.

6). Sixth Embodiment FIG. 22A shows a light shielding rate with respect to a viewing angle (vertical viewing angle) θy in the vertical direction including the eye point 11 of the light shielding layer 20 of the eyeglass lens 100e for the left eye according to the sixth embodiment. The distribution (change) is shown. FIG. 22B shows the distribution (change) of the light shielding ratio with respect to the horizontal viewing angle (horizontal viewing angle) θx including the eye point 11 of the light shielding layer of the eyeglass lens 100e for the left eye according to the sixth embodiment. Show. The spectacle lens 100e also has a low translucency provided so as to surround a high translucency region 12 including the eye point 11, and an upper side 18c, a lower side 18d, and an ear side 18b of the high translucency region 12. The low light-transmitting region 14 includes a region (gradient region) 16 having a higher light blocking rate than the high light transmitting region 12 and the light blocking rate changing toward the periphery 15. The gradient area 16 of this example also includes areas 16f to 16h in which the light shielding rate changes in multiple stages. However, the regions 16 f to 16 h in which the light shielding ratio changes in multiple stages in this example are thinned in multiple stages toward the periphery 15.

  That is, as shown in FIG. 22A, the inner region 16f in the vertical direction has a light shielding rate of 30% when the vertical viewing angle θy is in the range of 15 degrees to 25 degrees, and the outer region 16g has a vertical field of view. The light shielding rate is 20% when the angle θy is in the range of 25 degrees to 30 degrees. On the other hand, as shown in FIG. 22B, the inner region 16f in the horizontal direction has a light shielding rate of 30% when the horizontal viewing angle θx is in the range of 20 degrees to 30 degrees in the direction of the ear side 18b. The area 16g has a light shielding rate of 20% when the horizontal viewing angle θx is in the range of 30 ° to 40 °, and the outer area 16h has a light shielding rate of 10 when the horizontal viewing angle θx is in the range of 40 ° to 50 °. %. The boundaries between these regions 16f to 16h may change suddenly or gradually. The boundary between the innermost region 16f and the highly light-transmissive region 12 has a large difference in light shielding rate, so that the light shielding rate can be designed to gradually increase toward the periphery 15 even if it is sudden. preferable.

  The spectacle lens 100e can give an impact to the eyes, like the spectacle lens 100c of the fourth embodiment. At the same time, glare light in a region with a small viewing angle θ (vertical viewing angle θy, horizontal viewing angle θx) in which the visual efficiency due to the reduced glare light 52 is most likely to decrease can be effectively cut, and the contrast sensitivity can be increased. . Furthermore, it is possible to provide a colorful spectacle lens 100e that can also enjoy a change in hue.

7). Seventh Embodiment FIG. 23A shows a light shielding rate with respect to the viewing angle (vertical viewing angle) θy in the vertical direction including the eye point 11 of the light shielding layer 20 of the eyeglass lens 100f for the left eye according to the seventh embodiment. The distribution (change) is shown. FIG. 23B shows the distribution (change) of the light shielding ratio with respect to the horizontal viewing angle (horizontal viewing angle) θx including the eye point 11 of the light shielding layer of the eyeglass lens 100f for the left eye according to the seventh embodiment. Show.

  FIGS. 23A and 23B show the distribution of the dyeing concentration of the hard coat layer 43 on the back surface 10b and the wavelength selectivity of near-infrared light (wavelength 760 to 1300 nm) of the antireflection layer 44 on the front surface 10a. ing. The light-shielding layer 20 of the spectacle lens 100f is provided so as to surround the three regions of the highly transmissive region 12 including the eye point 11, the upper side 18c, the lower side 18d, and the ear side 18b of the highly transmissive region 12. And the low light-transmitting region 14 further includes a gradient region 16 in which the staining density (shading) is gradually increased toward the periphery 15. Further, the portion corresponding to the low light-transmitting region 14 of the antireflection layer 44 is designed not to selectively transmit near-infrared light, and the near-infrared light shielding rate of the low-light-transmitting region 14 is It is almost 100%.

  Wearers with retinal diseases, choroidal diseases, etc. are sensitive to light stimulation, feel pain, and often have inflammatory diseases. Therefore, it is desirable to avoid stimulation that leads to vasodilation, and it is desirable to suppress near-infrared light from entering the eyeball 101. On the other hand, shielding near-infrared light on the entire surface of the spectacle lens may reduce the sensitivity on the long-wavelength side of visible light depending on the design of the antireflection layer 44, and may hinder daily life. . In the spectacle lens 100f, the near-infrared light is selectively shielded in the low light-transmitting region 14 to thereby prevent the light from the light source 103 that may constantly enter the eyeball 101 like the reduced glare light 52. While near-infrared light can be shielded, the color sensitivity of the visual axis 105 can be prevented from decreasing. Furthermore, the ability to discriminate can be improved by cutting the reduced glare light 52, and the reduction in work efficiency can be suppressed.

  If the antireflection layer 44 is an inorganic multilayer film, the wavelength selectivity of the antireflection layer 44 can be realized by setting the thickness of each layer so that the transmittance of near infrared light is lower than that of other visible light. . Further, when the wavelength selectivity on the long wavelength side can be set with almost no influence on the visible light by the antireflection layer 44, it is effective to increase the near-infrared light shielding rate over the entire surface of the spectacle lens 100f. Furthermore, instead of the antireflection layer 44, a layer for reflecting near infrared light may be newly formed.

  Further, in a wearer who has retinal disease, choroidal disease, etc., visible light may also be a light stimulus. Therefore, it is desirable that the intensity of visible light (for example, 460 to 600 nm) can be halved. Therefore, it is effective to make the dyeing density of the hard coat layer 43 relatively high so that the light shielding rate reaches about 50% in the glare cut region 93.

  For example, as shown in FIG. 23A, the gradient region 16 of the low light-transmissive region 14 in the vertical direction is directed toward the periphery 15 in the intermediate region 96 having a vertical viewing angle θy of about 15 degrees to 20 degrees. Gradually, however, in the region 16i where the color is darkened relatively rapidly and in the glare cut region 93 outside the region 16i, ie, the vertical viewing angle θy is 20 degrees to 30 degrees, the color gradually increases toward the periphery 15. And a darkened region 16j. In this example, in the gradient area 16i, the light blocking ratio increases from about 0% to about 50% in the range of the vertical viewing angle θy from 15 degrees to 20 degrees, and in the gradient area 16j, the vertical viewing angle θy increases from 20 degrees to 30 degrees. In the range of degrees, the light shielding rate is increased from 50% to about 60%.

  On the other hand, as shown in FIG. 23B, the gradient region 16 of the low light-transmissive region 14 in the horizontal direction is a glare cut region 93 having a horizontal viewing angle θx of about 20 degrees to 30 degrees in the direction of the ear side 18b. Is a region 16i in which the color darkens gradually toward the periphery 15, but relatively abruptly, and a glare cut region where the horizontal viewing angle θx is 30 degrees to 50 degrees in the direction of the ear side 18b, that is, outside the area 16i. 93 includes a region 16j where the color gradually increases toward the periphery 15. In this example, in the gradient area 16i, the horizontal viewing angle θx is in the range of 20 degrees to 30 degrees in the direction of the ear side 18b, and the shading rate increases from about 0% to about 50%. In the gradient area 16j, the horizontal viewing angle The light shielding rate increases from about 50% to about 60% when θx is in the range of 30 to 50 degrees in the direction of the ear side 18b.

  Further, by combining with the light control layer 30, it is desirable that the highly light-transmitting region 12 around the eye point 11 is designed to have a light shielding rate of 50% or more in an environment with strong light stimulation such as outdoors. .

  Suppressing near-infrared light entering the eyeball 101 is effective for avoiding the occurrence of damage to the eyeball 101 even in a healthy person. Therefore, it is effective to wear this spectacle lens 100f not only for users having the above-mentioned obstacles but also for general users. Further, the spectacle lens 100f includes the gradient region 16, and can be provided as a spectacle lens rich in fashion. That is, this spectacle lens 100f is a spectacle lens with a universal design and can be worn not only for treatment but also as one item of fashion. For this reason, wearers with the above-mentioned disabilities can be used casually without causing other people to clearly recognize that they are for treatment, and for general users to feel resistance. it can.

8). Eighth Embodiment FIG. 24A shows the light shielding rate with respect to the viewing angle (vertical viewing angle) θy in the vertical direction including the eye point 11 of the light shielding layer 20 of the eyeglass lens 100g for the left eye according to the eighth embodiment. The distribution (change) is shown. FIG. 24B shows the distribution (change) of the light shielding rate with respect to the horizontal viewing angle (horizontal viewing angle) θx including the eye point 11 of the light shielding layer of the eyeglass lens 100g for the left eye according to the eighth embodiment. Show.

  24 (a) and 24 (b) show the distribution of the dyeing concentration of the hard coat layer 43 on the back surface 10b and the wavelength selectivity of near-ultraviolet light (wavelength 310 to 400 nm) of the antireflection layer 44 on the front surface 10a. Yes. The light-shielding layer 20 of the spectacle lens 100g is provided so as to surround a high light-transmitting region 12 including the eye point 11, and an upper side 18c, a lower side 18d, and an ear side 18b of the high light-transmitting region 12. And the low light-transmitting region 14 further includes a gradient region 16 in which the staining density (shading) is gradually increased toward the periphery 15. Further, the portion corresponding to the low light-transmitting region 14 of the antireflection layer 44 is designed not to selectively transmit near-ultraviolet light, and the light blocking rate of the near-ultraviolet light in the low light-transmitting region 14 is approximately 100. %It has become.

  A wearer with a disease such as a corneal disorder, a cataract, a glaucoma, or the like has a remarkable decrease in contrast of a retinal image due to scattered light generated in an eye tissue such as an eyeball (lens). Therefore, it is desirable to suppress the near-ultraviolet light on the short wavelength side that easily becomes scattered light from entering the eyeball 101. On the other hand, shielding near-ultraviolet light with the entire surface of the spectacle lens may reduce the sensitivity on the short-wavelength side of visible light depending on the design of the antireflection layer 44, which may hinder daily life. In the spectacle lens 100g, the near-ultraviolet light is selectively shielded in the low light-transmitting region 14, so that the near-light from the light source 103 that may enter the eyeball 101 steadily like the reduced glare light 52 is obtained. The ultraviolet light can be shielded and the color sensitivity of the visual axis 105 can be suppressed from decreasing. Furthermore, the ability to discriminate can be improved by cutting the reduced glare light 52, and the reduction in work efficiency can be suppressed.

  The wavelength selectivity of the antireflection layer 44 is set so that the transmittance of near-ultraviolet light is lower than other visible light if the antireflection layer 44 is an inorganic multilayer film as in the above example. This can be achieved. Further, when the wavelength selectivity on the short wavelength side can be set with almost no influence on the visible light by the antireflection layer 44, it is effective to increase the near-ultraviolet light shielding rate over the entire surface of the spectacle lens 100g. Furthermore, instead of the antireflection layer 44, a layer for reflecting near ultraviolet light may be newly formed.

  Furthermore, in a wearer with a disease such as corneal disorder, cataract, glaucoma, visible light becomes scattered light, leading to a decrease in contrast. Therefore, it is desirable that the intensity of visible light (for example, 460 to 600 nm) can be halved similarly to the above example. Suppressing near-ultraviolet light from entering the eyeball 101 is effective for avoiding the occurrence of damage to the eyeball 101 even in healthy individuals as in the case of near-infrared light. Therefore, it is effective to wear this spectacle lens 100g not only for users having the above-mentioned obstacles but also for general users. Furthermore, the spectacle lens 100g that can block near-ultraviolet light and can reduce visible light in a situation where the light intensity is strong is effective for a wide variety of users. Such a spectacle lens can be provided as a spectacle lens 100g having a gradient region 16 and rich in fashion in the present invention. Therefore, not only for treatment but also as a fashion item, various users can easily use it without feeling resistance. A spectacle lens having the above-described fashionability and capable of blocking both near-ultraviolet light and near-infrared light is also effective.

  In the above description, the present invention is described based on spectacles having a pair of spectacle lenses. However, the present invention is not limited to a pair of right and left binocular spectacle lenses. Also, it can be applied to various types of lenses, such as highly sealed goggles. Moreover, it is applicable also to the sunglasses and goggles which do not have vision correction ability, and these are contained in the claim of this application. Further, the spectacle frame 9 to which the spectacle lens 10 is attached may be a frame with a border as well as a frame without a border.

DESCRIPTION OF SYMBOLS 1 Glasses, 9 Glasses frame, 10 Eyeglass lens, 11 Eye point 12 High translucency area | region, 14 Low translucency area | region, 16 Gradient area | region 20 Light-shielding layer, 30 Light control layer 192f Distance area | region, 192n Near area | region, 192m Intermediate area

Claims (15)

A lens covering the front of the eye,
A highly translucent region including an eye point;
A lens having a low light-transmitting area provided so as to surround at least three sides of the upper, lower, left, and right sides of the high light-transmitting area, and having a light blocking ratio higher than that of the high light-transmitting area. .   The lens according to claim 1, wherein the low light-transmissive region includes a region where a light shielding rate changes toward the periphery.   The lens according to claim 2, wherein the low light-transmissive region includes a region in which a light shielding rate increases toward the periphery.   4. The lens according to claim 1, wherein the at least three sides include upper and lower sides and an ear side of the highly light-transmissive region.   5. The lens according to claim 1, wherein the low light-transmissive region includes a substantially C-shaped region.   6. The lens according to claim 1, wherein the high light-transmissive region includes a region having a viewing angle of at least 10 degrees and a total light blocking ratio of 0 to 95%.   6. The lens according to claim 1, wherein the high light-transmissive region includes a region having a viewing angle narrower than 20 degrees and a total light blocking ratio of 0 to 95%.   In any 1 item | term of the Claims 1 thru | or 7, The said low translucency area | region is provided with the 1st low translucency area | region and the 2nd provided so that the perimeter of the said 1st low translucency area | region might be enclosed. A lens including a second light-transmitting region having a light-shielding rate higher than that of the first light-transmitting region.   9. The lens according to claim 8, wherein the first low light-transmissive region includes a region having a horizontal viewing angle smaller than 30 degrees and a total light blocking ratio of 0 to 95%.   10. The lens according to claim 1, wherein the low light-transmitting region includes a region having a high light blocking rate for light having a wavelength of 760 to 1300 nm.   10. The lens according to claim 1, wherein the low light-transmitting region includes a region having a high light blocking rate for light having a wavelength of 310 to 400 nm.   The refractive power in any one of Claims 1 thru | or 11 between the distance area | region for seeing comparatively far, the near area | region for seeing comparatively near, and the distance area | region and the near area | region. And a continuously changing area, wherein the eye point is the center of the distance area.   The lens according to any one of claims 1 to 12, wherein the low light-transmissive region includes a region where at least a part of the lens is stained. The light control layer according to any one of claims 1 to 13, wherein the light control layer is formed on one surface of the lens, and the light control layer changes a light blocking rate of the high light-transmitting region and the low light-transmitting region. ,
A lens having a light shielding layer formed on the other surface of the lens, the light shielding layer increasing a light shielding rate of the low light transmissive region with respect to the high light transmissive region. The lens according to any one of claims 1 to 14 is a spectacle lens,
Glasses having the spectacle lens and a spectacle frame to which the spectacle lens is attached.