KR101504243B1 - Soft contact lens having effect of pinhole - Google Patents

Abstract

The present invention relates to a soft contact lens having a pinhole effect of a new structure having a function of correcting a visual acuity by a pinhole effect.
According to the present invention, there is provided a soft contact lens to be worn on a cornea of a wearer, comprising: a base part (10) molded from a soft transparent material; A shielding portion 20 formed in a size corresponding to the pupil of the wearer at the center of the upper surface of the base portion 10 or printed in a reticular pattern so as to cover the entire upper surface of the base portion 10; And a cover part (30) laminated on the upper surface of the base part (10) and covering the light shield part (20)
The light-shielding portion 20 is printed in a network pattern, and the netting of the network pattern forms a light-transmitting portion 26 through which light is transmitted. The pinhole effect can be obtained by the light-transmitting portion 26. There is provided a soft contact lens having an effect.

Description

[0001] The present invention relates to a soft contact lens having a pinhole effect,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft contact lens, and more particularly, to a soft contact lens having a pinhole effect of a new structure having a function of correcting a visual acuity by a pinhole effect.

Pinhole glasses are glasses equipped with a pinhole lens in which a number of fine holes are drilled in a non-transparent plate. When the pinhole glasses are worn, the object is seen through the minute holes drilled in the pinhole lens The depth of focus becomes deeper and the sharpness of the image is improved. In addition, it is widely known that the movement of the eye muscles is facilitated to help restore vision.

The technical background of such pinhole glasses will be described as follows. Figs. 1 and 2 are diagrams for explaining the technical background of the pinhole glasses. Fig. FIG. 1 shows that light enters the eye in a normal state, and FIG. 2 shows that light is incident through a pinhole in a state where light is partially blocked by a blocking film.

In the case of myopia, as shown in Fig. 1, an image is generated ahead of the normal person. Therefore, the image formed on the retina overlaps with several images, and the size of the image formed on the retina is large, resulting in a blurred image. 2, incident beams 1 and 3 are blocked by the blocking film, and the size of the image passing through the pinhole only by the incident beam 2 to the retina is And a clear image is formed.

The pinhole effect is called the pinhole effect, because the width of the light amount incident by the pinhole is artificially limited to allow viewing of distant objects (nearsightedness) or near objects (presbyopia). Therefore, people with refractive errors such as nearsightedness, pranism, astigmatism, and presbyopia through pinholes can see far or near objects using the pinhole effect.

However, since the pinhole glasses are opaque except for the pinhole portion, the light is not transmitted, so that the visibility is lowered, which may cause a safety risk, especially at night. The pinhole glasses are not suitable for continuous wearing in everyday life.

On the other hand, a soft contact lens having a pinhole for obtaining a pinhole effect through a soft contact lens has been proposed. However, since the soft contact lens is thin and softer, the contact lens formed with the pinhole tears easily, and there is a high possibility of damage. In particular, contact lenses are scrubbed by hand rubbing, and soft contact lenses with pinholes are very likely to tear during this cleaning process.

In addition, when a pinhole is formed in a contact lens, the surface of the contact lens is not smooth.

Korean Patent No. 10-0455302 (October 22, 2004) Korean Patent Publication No. 10-2012-0098641 (2012.09.05)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a vision correcting function by a pinhole effect, a wide view without limit of view, a good visibility, It is possible to provide a soft contact lens of a new constitution in which there is no inconvenience in living in daily life.

According to an aspect of the present invention, there is provided a soft contact lens to be worn on a wearer's cornea, the soft contact lens comprising: a base portion formed of a soft transparent material; A light shielding portion printed on a top surface of the base portion and a cover portion stacked on the top surface of the base portion so as to cover the light shielding portion, and as the light shielding portion is printed in a network pattern, The soft contact lens having a pinhole effect is provided.

According to another aspect of the present invention, the light shielding portion has a netting pattern in which the net eyes have a regular hexagonal shape, and the light transmitting portion has a regular hexagonal shape.

According to another aspect of the present invention, the light transmitting portion has an inner diameter of 0.4 to 1.5 mm, and the head portion of the reticulated pattern forming the light shielding portion is 0.05 to 0.2 mm.

According to another aspect of the present invention, the light-shielding portion is formed at a central portion of the base portion so as to have a size corresponding to the pupil of the wearer, and a decorative pattern is printed on the periphery of the upper surface of the base portion.

According to another aspect of the present invention, the light-shielding portion is formed at a central portion of the base portion to have a size of 4.0 to 9.0 mm.

According to the present invention having the above-described structure, the light-shielding portion of the network pattern is printed inside the soft contact lens, and the light-shielding portion has the pinhole function by forming the light-transmitting portion of the network pattern of the network pattern constituting the light-shielding portion.

Therefore, the soft contact lens according to the present invention has the effect of correcting the visual acuity by the pinhole effect. As described above, since the soft contact lens according to the present invention has the effect of correcting the visual acuity due to the pinhole effect
By this effect of correcting the visual acuity, the number of steps of the contact lens is partially or completely canceled.

That is, even if a wearer wears a contact lens having a lower degree of water than that of a conventional soft contact lens, the effect of correcting the vision by the existing soft contact lens can be obtained.

As described above, according to the present invention, a wearer can wear a soft contact lens having a relatively low water-level, i.e., a relatively thin soft contact lens, It is possible to obtain a desired level of visual correction effect while reducing the burden on the eyes.

In particular, since the soft contact lens is not punctured with a pinhole, and the light shielding portion is printed in a reticular pattern, the light transmitting portion functioning as a pinhole is formed. Therefore, as in the case where a pinhole is punctured in a soft contact lens, There is no worry about quality. Further, since the cover portion covers the light shielding portion, the outer surface of the soft contact lens is smooth, so that there is an advantage that a foreign substance is not felt when the contact lens is worn.

Further, when the network pattern of the light-shielding portion is formed so that the light-transmitting portion serving as a pinhole has a regular hexagonal shape, the interval between the light-transmitting portions is constant and the light-shielding portion is formed to have the same thickness.

The present invention has the effect of correcting the visual acuity due to the pin effect, and the appearance of the wearing state is not different from the normal state of the general soft contact lens, the visual field is not limited, and visibility is good, none.

Further, when a light shielding portion is formed at the central portion of the upper surface of the base portion and further a decorative pattern is further printed on the peripheral portion of the base portion, the decorative effect can be obtained by decorating the eyes. In other words, it is expected that the effect of eye candy can be obtained in addition to the effect of correcting the visual acuity by the pinhole.

FIG. 1 is a diagram showing an image formed by incidence of an external beam (in the case of myopia). FIG.
2 is a view showing an image formed by a pinhole effect;
3 is a photograph showing an embodiment of the present invention.
4 is a sectional view of the above embodiment.
5 is a front view of the above embodiment;
6 is a front view showing another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 3 and 4 are a perspective view and a front view showing the first embodiment of the present invention, and Fig. 5 is a sectional view thereof.

The soft contact lens according to the present invention comprises a base portion 10, a light shielding portion 20 printed on the upper surface of the base portion 10, and a light shielding portion 20 laminated on the upper surface of the base portion 10 so as to cover the light shielding portion 20. [ And a cover part (30).

The base portion 10 may be formed of at least one selected from the group consisting of N-vinylpyrrolidone (N-VP), dimethyl acrylamide (DMAA), glycerol methacrylate (GMA), silicone hydrogel ) And the like, which are used as molding materials for soft contact lenses.

Generally, the contact lens is molded by injecting a molding material between the upper and lower molds or by applying a molding material to the upper surface of the mold. The base portion 10 is also molded by this known method.

The light-shielding portion 20 is printed on the upper surface of the molded base portion 10. The light-shielding portion 20 is for shielding light, and is formed by printing with a non-light-transmitting pigment. The kind of the pigment for forming the light-shielding portion 20 is not particularly limited, but an azo-based coloring agent, a phthalocyanine-based coloring agent and the like which have already been confirmed as safe can be used.

The light-shielding portion 20 is formed in a planar network pattern. As the light shield 20 is formed in a network pattern, the net formed inside the network pattern constituting the light shield 20 forms a transparent portion 26 through which light is transmitted. Accordingly, the transparent portion 26 is formed in a dot shape inside the light-shielding portion 20. In the present invention, the transparent portion 26 thus formed functions as a pinhole.

The light-shielding portion 20 may be formed on the entire upper surface of the base portion 10, but is preferably formed at the center portion of the base portion 10 to have a size corresponding to the pupil of the wearer. Particularly, it is preferably formed to have a size of 4.0 to 9.0 mm in consideration of the size of the pupil at the time of mydriasis.

Preferably, the reticular pattern of the light-shielding portion 20 is designed such that the transparent portion 26 formed inside the light-shielding portion 20 has an inner diameter of about 0.4 to 1.5 mm. When the diameter of the transparent portion 26 is less than 0.4 mm, it is difficult to secure the field of view and it is difficult to wear the soft contact lens according to the present invention in everyday life. When the inner diameter of the transparent portion 26 exceeds 1.5 mm , It is difficult to expect a visual correction effect because the pinhole effect is insignificant.

The spacing between the transparent portions 26 is adjusted according to the thickness of the net pattern forming the shielding portion 20. The greater the thickness of the head of the shielding portion 20, the wider the interval between the transparent portions 26 The amount of incident light is reduced, so that the field of view is dark and particularly visibility at night is poor. Accordingly, the head thickness of the net pattern forming the light-shielding portion 20 is adjusted in consideration of this point. Preferably, the thickness of the light-shielding portion 20 is about 0.05 to 0.2 mm.

Particularly preferably, as shown in the figure, the shielding portion 20 is formed in a hexagonal mesh pattern so that the transparent portion 26 has a regular hexagonal shape. If the transparent portion 26 has a regular hexagonal shape as described above, the interval between the transparent portions 26 is uniform and evenly distributed, and the thickness of the shield portion 20 is kept constant.

If the transparent portion 26 is formed in a circular shape, the spacing between the transparent portions 26 is not constant, and the thickness of the light-shielding portion 20 is formed to be partially thick or thin. I can not. When the transparent portion 26 is formed in a rectangular shape, the inner diameter of the transparent portion 26 is large (since the inner diameter in the diagonal direction of the transparent portion is different from the inner diameter in the other direction) Are different from each other.

The light-shielding portion 20 is printed by various printing methods such as offset printing, gravure printing, and silk screen printing, or a transfer method using a transfer sheet.

On the other hand, the cover portion 30 is formed on the upper surface of the base portion 10 on which the light-shielding portion 20 is formed. The cover portion 30 is formed by coating the same material as the base portion 10. When the light shield 20 is exposed to the outside, the outer surface of the soft contact lens is uneven due to the light shield 20, so that a feeling of foreign matter is felt when the soft contact lens is worn. . ≪ / RTI > However, according to the present invention, since the light shielding portion 20 is covered by the cover portion 30, the outer surface of the soft contact lens is smooth, Even if it does not affect the eyes, the safety is excellent.

Also, since the cover portion 30 is prevented from being damaged by the shielding portion 20, the service life of the soft contact lens is also prolonged.

Preferably, the thickness of the base portion 10 and the cover portion 30 is adjusted so that the soft contact lens according to the present invention has a water flow rate.

The present invention having such a constitution is characterized in that the light- And has a pinhole effect by the transparent portion 26, so that the visual acuity is corrected.

In particular, the present invention forms the transparent portion 26 that functions as a pinhole by printing the light shield 20 of the reticulated pattern without puncturing the pinhole, so that the soft contact lens is not weakened by the pinhole, In particular, since the light-shielding portion 20 is not exposed to the outside by the cover portion 30, there is no possibility that the light-shielding portion 20 is damaged. Further, since the light shield 20 is covered by the cover 30, the outer surface of the soft contact lens is smooth, so that a foreign substance feeling is not felt when worn.

In addition, since the soft contact lens according to the present invention has the effect of correcting the visual acuity due to the pinhole effect, the degree of softening of the soft contact lens is partially or completely canceled by the effect of correcting the visual acuity, Even when a low water pressure is applied, the effect of correcting the visual acuity of the conventional soft contact lens can be obtained.

The lower the water content, the thinner the soft contact lens, and the lower the water content, the smaller the thickness of the soft contact lens. Therefore, according to the present invention, even if a relatively soft contact lens, that is, a relatively thin contact lens, is worn, the effect of correcting the visual acuity of the conventional soft contact lens can be obtained. It is possible to obtain a desired level of vision correction effect while giving less.

In addition, since the present invention is not different from a general SOAP contact lens in that the wearing state is uniform, and a plurality of transparent portions 26 are uniformly distributed, the visual field is not limited and wide, and visibility is good, There is nothing.

Hereinafter, other embodiments of the present invention will be described, and the same structures and effects as those of the above-described embodiments will not be described.

6 is a front view showing the second embodiment of the present invention. In this embodiment, the shielding portion 20 is formed at the center of the upper surface of the base portion 10, A decorative pattern 29 is formed. The decorative pattern 29 is formed by printing on the upper surface of the base 29. The decorative pattern 29 is printed in the process of printing the light shield 20.

Generally, the soft contact lens is formed to be slightly larger than the iris size of the wearer, and the soft contact lens according to the present invention is formed to be slightly larger than the iris size. Therefore, when the soft contact lens is worn, the periphery of the contact lens protrudes to the outside of the iris to cover the white part of the eye slightly.

When the decorative pattern 29 is further formed on the upper surface of the base 10 as in this embodiment, the decorative pattern 29 protrudes outside the iris to cover the whitish, so that the decorative pattern 29 is visually And therefore, the decorative pattern 29 is used to decorate the eyes beautifully.

Therefore, the soft contact lens according to the present embodiment has a cosmetic effect that the eyes are decorated by the decorative pattern 29 while having the effect of correcting the eyesight by the pinhole effect.

- Example -

When uncalibrated 43 eyes (86 eyes) were examined for uncalibra- tion and complete correction, and when a soft contact lens with a light shield 20 was worn in a rectangular net pattern as shown in Fig. 3, visual acuity and stereoacuity were measured Respectively.

 Hereinafter, in the first embodiment, a soft contact lens having an inner diameter of 0.4 mm is used as the transparent portion 26 having a pinhole function. In Embodiment 2, a soft contact lens having an inner diameter of 1.5 mm is used as the transparent portion 26 will be.

Hereinafter, the stereoscopic examination table was used by Randot ^R Spereotest of Stereo Optical Co., Ins, USA. It consists of 10 steps in one set of 3 circles horizontally and can measure up to 20 seconds in 400sec. Polarizing glasses were worn on both eyes and stereopsis was measured at 40cm, and the same test was performed 3 times and average value was used.

In order to obtain a statistically significant difference, a corresponding sample T-test was conducted using SPSS 19, and a statistically significant difference was found when the P-value was less than 0.05 based on the reliability of 95% Respectively.

- Distribution of general characteristics by subjects

The age distribution of the subjects was 10 to 9 (21%), 20 to 32 (74%), 30 to 0 (0%) and 40 to 2 (5%). The uncorrected visual acuity was found to be 54 eyes (63%) less than 0.1, 13 eyes (15%) 0.1 to 0.2, 13 eyes (15%) 0.3 to 0.5 and 6 eyes (7%) . Corrected visual acuity was less than 0.6 in 2 eyes (2%), 0.9 in 4 eyes (5%) and 1.0 in 86 eyes (93%).

Twenty-two eyes (26%) of myopia less than 2D, 48 eyes (56%) of 2D to 4D, and 16 eyes (18%) of near 4D were the most common refractive errors. Table 1)

 Distribution of general characteristics by subjects (unit: eyes) Characteristics Classification Frequency (%)
Age

18-19 9 (21%) 20 ~ 29 32 (74%) 30 ~ 39 0 (0%) 40 to 45 2 (5%)
Naked Visual Acuity (Mono) 0.1 below 54 (63%) 0.1 to 0.2 13 (15%) 0.3 to 0.5 13 (15%) 0.6 over 6 (7%)
Corrected
Visual Acuity
(Mono) 0.6 below 2 (2%) 0.9 4 (5%) 1.0 31 (36%) 1.0 39 (45%) 1.5 10 (12%) Refractive
Error (-D)
(Mono) 2.00 below 22 (26%) 2.00 to 4.00 48 (56%) 4.00 over 16 (18%)

* Refractive Error: SE value

- Visual acuity change

The uncorrected visual acuity before wearing the soft contact lens according to the present invention was 0.4 in myopia less than 2.00 D, 0.11 in myopic in 2.00 D to 4.00 D, and 0.03 in myopic in excess of 4.00 D, Low.

In the case of Example 1, the visual acuity was increased from 0.32 ± 0.21 in myopia less than 2.00 D to 0.32 ± 0.21 in naked eye, 0.23 in 2.00 D to 4.00 D, and 0.13 ± 0.15 in naked eye. Respectively.

In the case of Example 2, the visual acuity was increased from 0.26 ± 0.2 to 0.66 in myopia less than 2.00 D, 0.23 ± 0.2 in the 2.00 D to 4.00 D nearsighted eyes, and 0.13 ± 0.18 in the near-sighted eyes. Respectively.

 In the case of wearing the soft contact lens according to the present invention, the visual acuity was increased, and the visual acuity of the transparent portion functioning as a pinhole was 0.4 mm higher than that of 1.5 mm 2)

  Visual acuity change
Myopic
Error (D)
NVA

CVA Example 1 Example 2 P.V.A change P.V.A change
2.00 below

0.4

1.14

0.72
+ 0.32 + 0.21
p = 0.000

0.66
+ 0.26 + - 0.2
p = 0.000
2.00 to 4.00

0.11

1.14

0.23
+ 0.13 + - 0.15
p = 0.000

0.23
+ 0.13 + - 0.18
p = 0.000
4.00 Over

0.03

1.09

0.04
+ 0.01 0.01
p = 0.000

0.04
+ 0.01 0.01
p = 0.000

* N.V.A: Naked Visual Acuity * C.V.A: Corrected Visual Acuity

* P.V.A: Pinhole Visual Acuity

In Example 1, 23 eyes (93%) were elevated in less than 2.00 D, 2 eyes (8%) in unchanged eyes, and 40 eyes (89%) in 2.00 D to 4.00 D myopia 5 eyes (11%) of unchanged eyes, 11 eyes (69%) of elevated eyes and 5 eyes (31%) of eyes without change of visual acuity.

In the case of Example 2, 23 eyes (92%) were observed at less than 2.00 D, 2 eyes (8%) without change, 40 eyes (89%) at 2.00 D ~ 4.00 D, (11%), and 10 eyes (63%) with elevated eyes and 6 eyes (37%) with no change at 4.00 D or higher. The higher the myopia, the better the visual acuity (See Table 3).

 Improvement of visual acuity (unit: eyes) Myopic Error (D) Visual Acuity Change Example 1 (%) Example 2 (%)
2.00
below Increase 23 (92%) 23 (92%) No change 2 (8%) 2 (8%) Decrease 0 0 Total 25 25
2.00 to 4.00 Increase 40 (89%) 40 (89%) No change 5 (11%) 5 (11%) Decrease 0 0 Total 45 45
4.00
Over Increase 11 (69%) 10 (63%) No change 5 (31%) 6 (37%) Decrease 0 0 Total 16 16

- Binocular vision and change of stereoscopic acuity.

 The average binocular visual acuity was 0.27 ± 0.26 and stereopsis was 93.95 ± 83.35 sec. The corrected visual acuity was 1.33 ± 0.17 and 63.02 ± 38.67 sec, respectively. Respectively.

In the case of Example 1, the binocular visual acuity was 0.47 ± 0.41, which was 0.20 higher than that of the naked eye, and stereopsis was 56.86 ± 45.68 sec, which was improved by 37.09 sec. In the case of Example 2, the binocular visual acuity was 0.46 ± 0.45 which was 0.19 higher than that of the naked eye, and stereopsis was 60.23 sec ± 47.75, which was 33.72 sec higher than that of the naked eye. That is, when wearing the soft contact lens according to the present invention, stereoscopic vision was increased (see Table 4).

Binocular vision and change of stereoscopic acuity Nacked Eye Corrected Eye Example 1 Example 2
B.V.A 0.27 ± 0.26 1.33 + 0.17 0.47 + 0.41 0.46 + 0.45 Stereoscopic Acuity
(unit: sec) 93.95
± 83.35 63.02
± 38.67 56.86
± 45.68 60.23
± 47.75

* B.V.A: Binocular Visual Acuity

- changes in refractive help stereopsis (C hange of stereoscopic acuity by refractive status)

 Changes in stereoacuity with non - atopic refraction and pinhole use increased to 27.27 ± 92.60 sec at full correction at less than 2.00 D in myopic stereoacuity. In the case of Example 1, it was increased by 44.55 ± 103.98 sec, and in Example 2, it was increased by 42.27 ± 107.18 sec.

In myopia of 2.00 D ~ 4.00 D, it was 16.82 ± 24.57 sec higher than that of full correction, 21.59 ± 34.48 sec in Example 1 and 18.86 ± 36.97 sec in Example 2. Excess myopia of 4.00 D was increased by 78.75 ± 94.30 sec in total correction compared to that of naked eye, 63.00 ± 80.42 sec in Example 1, and 57.00 ± 110.76 sec in Example 2.

Stereo visual acuity at pinhole was best at less than 2.00 D in myopia (42.27 sec) in Example 1 (see Table 5).

 Change of stereoscopic acuity by refractive status Myopic
Error (D) Naked SA
Corrected Eye Example 1
Example 2 S.A Change
S.A Change S.A Change 2.00 below 86.82
59.55 +27.27
± 92.60
p = 0.352
42.27 +44.55
± 103.98
p = 0.186 44.55 +42.27
± 107.18
p = 0.220 2.00 to 4.00 70.68
53.86 +16.82
± 24.57
p = 0.004
49.09 +21.59
± 34.48
p = 0.008 51.82 +18.86
± 36.97
p = 0.026 4.00
over 153.00
66.00 +78.75
± 94.30
p = 0.054
90.00 +63.00
± 80.42
p = 0.035 96.00 +57.00
± 110.76
p = 0.138

* SA: Stereoscopic Acuity

- Improvement of stereoscopic acuity

Stereo visual acuity improved by 58% in full correction, 35% in unchanged, and 7% in poorly corrected. In the case of Example 1, 65% was increased, 30% was not changed, and 5% was decreased. In the case of Example 2, 63% was increased, 23% was unchanged, and 14% was degraded (see Table 6).

 Improvement of stereoscopic acuity Stereoscopic Acuity Corrected Eye Example 1
Example 2 Increase 25 (58%) 28 (65%) 27 (63%) No change 15 (35%) 13 (30%) 10 (23%) Decrease 3 (7%) 2 (5%) 6 (14%)

10. Base portion 20. Light shielding portion
26. Transparent part 29. Decorative pattern
30. The cover portion

Claims (5)

A soft contact lens to be worn on a cornea of a wearer,
A base portion 10 molded from a soft transparent material;
A light shielding part 20 formed at the center of the upper surface of the base part 10 to correspond to the pupil of the wearer and printed in a reticular pattern on the upper surface of the base part 10; And
And a cover part (30) stacked on the upper surface of the base part (10) and covering the light shield part (20)
Wherein the light shielding part (20) is printed in a network pattern, and each net formed by the network pattern is formed as a transparent part (26) through which light is transmitted.
The method according to claim 1,
Wherein the light-shielding portion (20) has a network pattern in which the net eyes have a regular hexagonal shape, and the transparent portion (26) has a regular hexagonal shape.
3. The method according to claim 1 or 2,
Wherein the transparent portion has an inner diameter of 0.4 to 1.5 mm and a head portion of a reticular pattern forming the light shield portion is 0.05 to 0.2 mm.
3. The method according to claim 1 or 2,
The light-shielding portion 20 is formed at a central portion of the base portion 10 to have a size corresponding to the pupil of the wearer,
And a decorative pattern (29) is printed on the upper surface of the base part (10).
5. The method of claim 4,
Wherein the light-shielding portion (20) is formed at a central portion of the base portion (10) so as to have a size of 4.0 to 9.0 mm.

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