JP6030425B2 - Parameter measuring apparatus, parameter measuring method, spectacle lens design method, and spectacle lens manufacturing method - Google Patents

Description

  The present invention relates to a parameter measurement device, a parameter measurement method, a spectacle lens design method, a spectacle lens manufacturing method, and a spectacle lens.

  A progressive power lens comprising a distance portion which is a region having a refractive power corresponding to a distant view and located above the lens, and a near portion which is a region having a refractive power corresponding to a distant view and located below the lens. Are known.

  In order to design a progressive-power lens suitable for spectacle wearers, parameters such as the interpupillary distance in the far vision state, the interpupillary distance in the near vision state, the corneal apex distance, the forward tilt angle, and the warp angle are set. It is used. As an apparatus for measuring these parameters, for example, a measuring apparatus that uses an image obtained by capturing a spectacle wearer is known (see Patent Document 1).

JP 2007-93636 A

  In a spectacle store, for example, when a customer purchases new spectacles, the customer wears a new spectacle frame selected by the customer and measures the above parameters. In this case, the selected spectacle frame is in a state in which a dummy lens having no power is attached. However, when the customer actually uses spectacles, a spectacle lens having a frequency corresponding to the customer's spectacle prescription value is attached to the selected spectacle frame. Therefore, in the measurement apparatus of the prior art, for the parameters related to the eye position in the near vision state, such as the distance between the pupils in the near vision state, the measured value and the actual spectacles are used by the prism action of the spectacle lens. There was a problem that the value in was different.

(1) A parameter measuring device according to the first aspect of the present invention is based on a near vision imaging unit that images a spectacle wearer in a near vision state, and a near vision image captured by the near vision imaging unit. The near vision parameter measuring means for measuring the near vision parameter related to the eye position in the near vision state, the input means for inputting the spectacle prescription value of the spectacle wearer, and the glasses input by the input means Correction means for correcting the near vision parameter measured by the near vision parameter measurement means according to the prescription value, and the near vision parameter includes the interpupillary distance in the near vision state, and the correction means Calculates the lateral power of the spectacle lens prescribed from the spectacle prescription value, and corrects the interpupillary distance in the near vision state measured by the near vision parameter measuring means according to the lateral power .
(2) In the parameter measurement method according to the seventh aspect of the present invention, a near vision image imaging step of imaging a spectacle wearer in a near vision state by an imaging means, and a near vision image imaging step A near vision parameter measurement step for measuring a near vision parameter related to the eye position in the near vision state based on the near vision image, and a near vision parameter measurement according to the spectacle prescription value of the spectacle wearer possess a correction step of correcting the near vision parameters measured by the process, a near vision parameters include the interpupillary distance in near vision state, the correction process, eyeglass formulated from eyeglasses prescription value The power in the lateral direction of the lens is calculated, and the interpupillary distance in the near vision state measured by the near vision parameter measurement process is corrected according to the power in the lateral direction .
(3) spectacle lens design method according to the invention of claim 8, design the spectacle lenses by using a near vision parameter measured by the parameter measuring device according to any one of claims 1 to 6 .
(4) According to a ninth aspect of the present invention, there is provided a spectacle lens manufacturing method comprising: a spectacle lens designed using the near vision parameter measured by the parameter measuring device according to any one of the first to sixth aspects; you production.

  ADVANTAGE OF THE INVENTION According to this invention, the parameter relevant to the position of the eye in a near vision state in the state which the spectacles wear | weared the spectacles actually used can be calculated | required.

It is a figure explaining the structure of the parameter measurement apparatus which concerns on this embodiment. It is a figure explaining the spectacles wearer of a far vision state. It is a figure explaining the spectacles wearer of a near vision state. It is a figure explaining a fitting parameter. It is a figure explaining a fitting parameter. It is a figure explaining the change of the amount of inset according to the power of a spectacle lens. It is a figure which illustrates typically the relationship of the light ray when a spectacles wearer gazes at a nearby point. It is a flowchart explaining a series of procedures which provide spectacles. It is a figure explaining fitting height.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining the configuration of a parameter measuring apparatus 1 according to an embodiment of the present invention. The parameter measuring device 1 is a device that measures various parameters (hereinafter referred to as fitting parameters) in a state in which a spectacle wearer wears spectacles. As shown in FIG. 1, the parameter measuring device 1 includes a main body device 10, a main body computer 20, a tablet computer 30, and a touch panel display 40.

  The main unit 10 has a vertically long casing 11, and a mirror 12 is provided on the surface of the casing 11. In the housing 11 of the main body device 10, a far vision camera 13 for imaging a state in which the spectacle wearer viewed far, a light source (not shown) for illuminating the spectacle wearer, and the like are provided. Yes. The far vision camera 13 includes an upper camera 13T arranged on the upper side and a lower camera 13D arranged on the lower side. The main device 10 is connected to the main computer 20 and outputs an image captured by the far vision camera 13 to the main computer 20.

  The tablet computer 30 is a portable computer that can be held by a spectacle wearer. The tablet computer 30 is provided with a near vision camera 31 for photographing a state in which a spectacle wearer has viewed near, a touch panel display 32, and the like. The tablet computer 30 transmits an image captured by the near vision camera 31 to the main computer 20 by wireless communication, for example.

  The main body computer 20 is provided with a calculation unit such as a CPU for performing calculation processing, a storage unit for storing various data, and the like. The storage unit stores a program for executing the fitting parameter measurement process, and the calculation unit performs the fitting parameter measurement process by executing the program stored in the storage unit.

  The touch panel display 40 is connected to the main computer 20, and various information output from the main computer 20 (for example, images captured by the far vision camera 13 and the near vision camera 31, the measurement results of the fitting parameters, and the like). ) Is displayed. Further, the measurer can operate the main body computer 20 or input various information by a touch operation on the touch panel display 40.

  FIG. 2 is a diagram for explaining a state in which the spectacle wearer 2 captures a state viewed from a distance. As shown in FIG. 2, the imaging device 10 is disposed in front of the spectacle wearer 2 when photographing the state in which the spectacle wearer 2 viewed from a distance. At this time, the imaging device 10 is arranged so that the upper camera 13T images the vicinity of the glasses of the spectacle wearer 2 from the front, and the lower camera 13D images the vicinity of the glasses of the spectacle wearer 2 from the oblique lower side. For example, the spectacle wearer 2 is in a far vision state by looking straight at the center of the bridge of his / her glasses reflected on the mirror 12 of the imaging device 10. In this state, the spectacle wearer 2 is imaged by the upper camera 13T and the lower camera 13D. Actually, even in this state, the eye is slightly inward, so in the fitting parameter measurement process described later, the interpupillary space obtained based on the image captured by the far vision camera 13 is used. The distance (PD) is corrected using the distance between the spectacle wearer and the mirror 12.

  FIG. 3 is a diagram for explaining a state in which the spectacle wearer 2 takes a close-up view. As shown in FIG. 3, when photographing the near-sighted state of the spectacle wearer 2, the spectacle wearer 2 is a tablet type so that the near-eye camera 31 can capture the vicinity of the spectacle wearer 2. Hold computer 30 in your hand. At this time, the spectacle wearer 2 is in a near vision state by holding the tablet computer 30 in his / her natural state, for example, when reading a book or operating a portable terminal. It becomes. In this state, the eyeglass wearer 2 is imaged by the near vision camera 31.

  The main body computer 20 measures the fitting parameters of the spectacle wearer based on images taken by the far vision camera 13 and the near vision camera 31. First, the fitting parameter measured based on the image captured by the far vision camera 13 will be described with reference to FIG. 4A is a view of the spectacle wearer as viewed from the front, FIG. 4B is a view of the spectacle wearer as viewed from the side, and FIG. 4C is a spectacle wearer. It is the figure which looked at from the top. The main computer 20 measures the distance between the one-eye pupils in the far vision state (far-right PD and far-left PD) based on the image captured by the upper camera 13T. As shown in FIG. 4A, the far right PD (RFPD) and the far left PD (LFPD) are distances from the pupil center of the right eye or the left eye to the center of the bridge of the glasses 3 in the far vision state. is there. The main computer 20 measures the corneal apex distance VD, the forward tilt angle TI, and the warp angle WR based on the images captured by the upper camera 13T and the lower camera 13D. As shown in FIG. 4B, the corneal apex distance VD is a distance from the apex of the cornea of the spectacle wearer to the inner surface of the spectacle lens. As shown in FIG. 4B, the forward tilt angle TI is an angle of the spectacle lens surface with respect to the vertical direction. The warp angle WR is the angle of the spectacle lens surface with respect to the horizontal direction along the bridge of the spectacles 3 as shown in FIG. In the parameter measuring apparatus 1 of the present embodiment, the eyeglass wearer is imaged from two different directions depending on the upper camera 13T and the lower camera 13D, thereby measuring the corneal apex distance VD, the forward tilt angle TI, and the warp angle WR. It is possible.

  Next, the fitting parameters measured based on the image captured by the near vision camera 31 will be described with reference to FIG. 5A is a view of the spectacle wearer as viewed from the front, and FIG. 5B is a view of the spectacle wearer as viewed from the side. The main body computer 20 measures the distance between the one-eye pupils in the near vision state (right eye near PD and left eye near PD) and the near work distance based on the image captured by the near vision camera 31. . As shown in FIG. 5A, the right eye near PD (RNPD) and the left eye near PD (LNPD) are from the pupil center of the right eye or the left eye in the near vision state to the center of the bridge of the glasses 3. Is the distance. As shown in FIG. 5B, the near work distance ND is the distance from the eye of the spectacle wearer to the gazing point (here, the tablet computer 30).

  In this way, the parameter measuring device 1 actually measures the fitting parameters of the spectacle wearer in the far vision state and the near vision state. Note that various methods may be used for obtaining the above-described fitting parameters based on the images captured by the far vision camera 13 and the near vision camera 31. For example, it is possible to use a method of photographing in a far vision state and a near vision state with a measuring jig having a known length attached to a spectacle frame. In this method, first, a value on a captured image is obtained for each fitting parameter. Then, the value of each fitting parameter on the captured image is converted into an actual value on the basis of the length of the measurement jig on the captured image. Further, the near working distance is calculated based on the size of the measuring jig mounted on the spectacle frame on the image captured by the near vision camera 31.

  By the way, in a spectacle store, for example, when a customer newly purchases spectacles, when the customer selects a spectacle frame for new spectacles, the fitting parameters described above are measured with the spectacle frame worn by the customer. At this time, the fitting parameter is measured in a state in which the selected spectacle frame is mounted with a dummy lens that does not include the power. However, when the customer actually uses spectacles, a spectacle lens having a frequency corresponding to the customer's spectacle prescription value is attached to the selected spectacle frame. Therefore, for the right eye near PD and the left eye near PD, the values at the time of measurement and at the time of actual use change due to the prism action of the spectacle lens.

  This will be described with reference to FIG. Even if the power of the spectacle lens is changed, the far right PD and the far left PD do not change. Therefore, when the power of the spectacle lens is changed, the change amount of the right eye near PD and the inset amount of the right eye (the amount obtained by subtracting the right eye near PD from the right eye far PD) are the same. The amount of change in the left eye near PD and the inset amount of the left eye (the amount obtained by subtracting the left eye near PD from the left eye far PD) are the same. Therefore, in the following description, how the inset amount changes according to the power of the spectacle lens will be described with reference to FIG. 6A shows a case where the spectacle lens GL has a positive power (a convex lens), and FIG. 6B shows a case where the power of the spectacle lens GL is zero (a plano lens). FIG. 6C shows the case where the spectacle lens GL is a minus power (concave lens). 6A to 6C, conditions other than the power of the spectacle lens GL (for example, the far right PD, the far left PD, and the near working distance) are the same.

  As can be seen by comparing FIG. 6A and FIG. 6B, when the spectacle lens GL has a positive power, the light beam L1 from the object is refracted by the prism action of the spectacle lens GL, thereby causing spectacles. On the lens GL, it passes through a point on the inner side (nose side) from the point through which the light ray L2 from the object when the power of the spectacle lens GL is zero. For this reason, when the spectacle lens GL is a plus power, the amount of inset is larger than when the power is zero.

  Further, as can be seen by comparing FIG. 6B and FIG. 6C, when the spectacle lens GL has a negative power, the light beam L3 from the object is refracted by the prism action of the spectacle lens GL. On the spectacle lens GL, the point on the outer side (ear side) is transmitted from the point where the light ray L2 from the object is transmitted when the power of the spectacle lens GL is zero. For this reason, when the spectacle lens GL has a negative power, the amount of inset is smaller than when the power is zero.

  As described above, when the spectacle wearer wears spectacles with a dummy lens that does not contain power and when wearing spectacles with a spectacle lens that contains power, the near PD and The amount of inset will be different. Therefore, in the parameter measuring apparatus 1 of the present embodiment, the spectacle lens actually used for the right eye near PD and the left eye near PD measured based on the image captured by the near vision camera 31 is used. Correction is made in consideration of the frequency.

  FIG. 7 is a diagram schematically illustrating the relationship of light rays when a spectacle wearer gazes at a nearby point A. FIG. Although the right eye will be described here, the same applies to the left eye, and the description thereof will be omitted. A light ray L11 in FIG. 7 indicates a light ray that originates from the point A and reaches the rotation center O of the right eye Ey when a dummy lens having no power is used as the spectacle lens GL. A light ray L12 in FIG. 7 indicates a light ray that originates from the point A and reaches the rotation center O of the right eye Ey when a spectacle lens of power R (unit: diopter) is used as the spectacle lens GL. The light beam L12 is refracted by the prism action of the spectacle lens GL and enters the right eye Ey. FIG. 7 shows the light ray L12 when the power R is a negative power. The point where the light ray L12 passes through the spectacle lens GL is outside the point where the light ray L11 passes through the spectacle lens (ear). Side).

Correction of right eye inset amount I '(unit: mm) for right eye inset amount when using spectacle lens of power R, right eye inset amount when using dummy lens I (unit: mm) When the quantity is X (unit: mm), these relationships are expressed by the following equation (1). The right-eye inset amount I when using the dummy lens is measured based on the right-eye far-field PD measured based on the image captured by the far vision camera 13 and the image captured by the near vision camera 31. It calculates | requires by calculating the difference with near right-eye near PD. Further, a difference between the binocular distant PD measured based on the image captured by the far vision camera 13 and the binocular near PD measured based on the image captured by the near vision camera 31 is calculated. The inset amount I may be obtained by multiplying the difference by 1/2. Further, the sign of the correction amount X is negative when the frequency R is a positive frequency, and is positive when the frequency R is a negative frequency.
I ′ = I−X (1)

Here, the near working distance is ND (unit: mm), the corneal apex distance is VD (unit: mm), the distance from the rotation center O of the right eyeball Ey to the corneal apex is r (unit: mm), If the amount of horizontal deviation between the light beam L11 and the light beam L12 at the near working distance ND is Y (unit: mm), the correction amount X is calculated by the following equation (2). For the near work distance ND and the corneal apex distance VD, values measured based on images captured by the far vision camera 13 and the near vision camera 31 are used. For the corneal apex distance VD, a preset value (for example, 12 mm) may be used. A predetermined value (for example, 13 mm) is used for the distance r from the center of rotation O of the right eyeball Ey to the apex of the cornea.
X = Y (VD + r) / (ND + r) (2)

Further, assuming that the prism refracting power at the transmission point B through which the light ray L12 passes through the spectacle lens GL of power R is P (unit: prism diotri), the shift amount Y is approximately calculated by the following equation (3). The
Y = P (ND−VD) / 100 (3)

In addition, the prism refractive power P at the transmission point B of the light ray L12 in the spectacle lens GL of power R is approximately calculated by the following equation (4) based on the Prentice formula. In the following equation (4), it is assumed that the inset amount I ′ when the spectacle lens GL having the power R is used is substantially the same as the distance from the optical center point of the spectacle lens GL to the transmission point B of the light beam L12. Used.
P = RI ′ / 10 (4)

  The correction amount X can be calculated by solving the above equations (1) to (4). Then, by adding the correction amount X to the right-eye near-field PD (RNPD) measured based on the image captured by the near-field camera 31, the right-eye near-field PD when using the power R spectacle lens is obtained. Can do. For the left eye near PD, the left eye near PD at the time of using the power R spectacle lens can be obtained by performing the same calculation as the right eye near PD.

  In this way, in the parameter measuring apparatus 1, the right eye near PD and the left eye near PD measured using a dummy lens that does not contain the power depend on the power of the spectacle lens actually used. By performing the correction, the right eye near PD and the left eye near PD in the actually used spectacle lens can be obtained.

  Next, in this embodiment, a series of procedures for providing glasses to a customer will be described with reference to the flowchart shown in FIG. The procedure performed at the eyeglass store is shown on the left side of FIG. 8, and the procedure performed at the lens manufacturer is shown on the right side of FIG. In step S10, the customer determines a spectacle frame to purchase at the spectacle store.

  In step S11, prescription values (for example, spherical power (S power), astigmatism power (C power), astigmatic axial power, addition power, etc.) of the eyeglass lens to be mounted on the eyeglass frame determined in step S10 are determined. The prescription value of the spectacle lens is determined based on a prescription issued to the customer by an ophthalmologist or a vision check performed at a spectacle store. A store clerk of the spectacle store inputs the prescription value of the spectacle lens to the parameter measuring device 1 via the touch panel display 40.

  In step S <b> 12, the fitting parameter is measured by the parameter measuring device 1 in a state where the customer wears the spectacles in which the dummy lens not included in the spectacle frame determined in step S <b> 10 is attached.

  Specifically, as described above, the parameter measuring apparatus 1 images the customer (glasses wearer) in the far vision state with the far vision camera 13. Further, the parameter measuring device 1 images a customer (glasses wearer) in the near vision state by the near vision camera 31. Then, the main body computer 20 of the parameter measuring apparatus 1 measures the fitting parameters based on the images captured by the far vision camera 13 and the near vision camera 31.

Further, the main body computer 20 calculates the power R in the lateral direction of the spectacle lens from the prescription values (spherical power S, astigmatism power C, and astigmatism axis degree θ) input in step S11, using Equation (5). To do. That is, the lateral power R of the spectacle lens is obtained by adding the lateral component of the astigmatic power C to the spherical power S. The unit of the spherical power S and the astigmatic power C is diopter.
R = S + C (sin θ) ² (5)

  Then, the main body computer 20 calculates the frequency R calculated by the above equation (5) and the far right PD, the far left PD, the near working distance ND, and the corneal apex distance VD measured based on the captured image. Using the above equations (1) to (4), the correction amounts X of the right eye near PD and the left eye near PD are respectively calculated. The main body computer 20 corrects the right eye near PD and the left eye near PD measured based on the captured image using the correction amount X, and outputs the corrected value as a measurement value. The prescription value of the spectacle lens used for the above calculation is based on the use of a distant prescription. However, as a part of the addition power, the distant spherical power (S power) is added to some extent. A shifted value may be used. For example, a value obtained by adding half of the addition power to the S power for distant view may be used.

  In step S13, the clerk of the spectacle store stores spectacle lens information including the spectacle frame information determined in step S10, the spectacle lens prescription value determined in step S11, and the fitting parameter measured by the parameter measuring device 1 in step S12. The ordering information is input to an ordering computer (not shown) installed in the spectacle store. The ordering computer transmits the input ordering information to a receiving order computer (not shown) installed at the lens manufacturer via a network such as the Internet.

  In step S20, in the lens manufacturer, the order receiving computer receives the spectacle lens ordering information from the ordering computer of the spectacle store. In step S21, the order receiving computer designs a spectacle lens based on the received spectacle lens ordering information. That is, the spectacle lens is designed based on information such as spectacle frame information, spectacle lens prescription values, and fitting parameters measured by the parameter measuring apparatus 1.

  For example, when designing a progressive-power lens, a lens manufacturer designer determines the far-eye point in the progressive-power lens based on the far right PD and the far left PD measured by the parameter measuring device 1. Set. Further, the designer of the lens manufacturer sets a near eye point in the progressive power lens based on the right eye near PD and the left eye near PD measured by the parameter measuring device 1.

  As described above, the right-eye near PD and the left-eye near PD output from the parameter measuring device 1 can be used even when the customer wears spectacles equipped with dummy lenses that do not contain power, even when the customer wears the spectacles. Since the correction is performed according to the prescription value of the lens, the right eye near PD and the left eye near PD in the state where the customer actually wears the spectacle lens to be used. Therefore, a spectacle lens suitable for the customer (glass wearer) can be designed using the right eye near PD and the left eye near PD output from the parameter measuring device 1.

  In step S22, the order receiving computer outputs the spectacle lens design data designed in step S21 to a processing machine control device (not shown). Based on this design data, the processing machine control device sends a processing instruction to a spectacle lens processing machine (not shown). As a result, the spectacle lens based on the design data is processed and manufactured by the spectacle lens processing machine. Then, the spectacle lens manufactured by the spectacle lens processing machine is shipped to a spectacle store. In step S14, the spectacle store completes the spectacle lens by manufacturing the spectacle lens manufactured in step S22 in the spectacle frame determined in step S10, and provides it to the customer.

According to the embodiment described above, the following operational effects can be obtained.
The parameter measuring device 1 is based on a near vision camera 31 that captures an eyeglass wearer in a near vision state while wearing non-frequency glasses, and an image captured by the near vision camera. , A main body computer 20 for measuring the right eye near PD and the left eye near PD, a touch panel type display 40 for inputting spectacle prescription values of the spectacle wearer, and spectacle prescription values (spherical powers) input by the touch panel type display 40 Main body computer 20 that corrects the right eye near PD and the left eye near PD measured in accordance with the astigmatism power and the astigmatism axial degree). Thereby, the parameter measuring apparatus 1 can obtain the right eye near PD and the left eye near PD in a state where the spectacle wearer wears the glasses actually used.

(Modification 1)
The parameter measuring apparatus 1 may further measure the height of the pupil center relative to the spectacle lens (hereinafter referred to as the fitting height) in the far vision state and the near vision state as the fitting parameter. The fitting height (FH, NH) is, for example, the distance from the center of the pupil to the lower side of the spectacle lens GL as shown in FIG.

  Further, in the near vision state as shown in FIG. 9 (b), the pupil is closer to the lower side than the far vision state shown in FIG. 9 (a), so the fitting height NH in the near vision state is This is lower than the fitting height FH in the far vision state. Also, the fitting height NH in the near vision state varies depending on the power of the spectacle lens due to the prism action of the spectacle lens. Therefore, similar to the correction of the distance between the one-eye pupils in the near vision state in the above-described embodiment, the fitting height in the near vision state may be corrected according to the prescription value of the spectacle lens. .

In this case, in the above formulas (1) to (4), the inset amount is replaced with an eye drop amount (difference in fitting height between the far vision state and the near vision state), and the power R is determined by the spectacle lens. What is necessary is just to substitute the frequency R of the vertical direction. The power R in the longitudinal direction of the spectacle lens is calculated by Equation (6) using the prescription values of the spectacle lens (spherical power S, astigmatism power C, and astigmatism axial power θ). That is, by adding the vertical component of the astigmatic power C to the spherical power S, the vertical power R of the spectacle lens is obtained.
R = S + C (cos θ) ² (6)

  Further, the parameter measuring apparatus 1 measures the inset amount and the distance between the pupils of both eyes in the far vision state and the near vision state (the distance between the right eye pupil and the left eye pupil) as the fitting parameters. You may do it. In this case, the parameter measuring apparatus 1 corrects the inset amount and the interpupillary distance in the near vision state according to the prescription value of the spectacle lens, as in the above-described embodiment.

  As described above, the present invention relates to parameters related to the eye position in the distance vision and near vision states of the spectacle wearer (for example, the distance between the pupils of both eyes, the distance between the pupils of one eye, the inset amount, and the fitting height). It can be applied when measuring the

(Modification 2)
In the above-described embodiment, the parameter measuring apparatus 1 corrects the right eye near PD and the left eye near PD measured based on the image captured by the near vision camera 31 according to the prescription value of the spectacle lens. An example was described. However, the parameter measuring apparatus 1 may output the right-eye near PD and the left-eye near PD measured based on the image captured by the near vision camera 31 as measurement values. In this case, the order information of the spectacle lens transmitted from the ordering computer of the spectacle store to the ordering computer of the lens manufacturer includes the right eye near PD and the left eye near PD measured with a dummy lens having no power. Therefore, when designing a spectacle lens on the lens manufacturer side, the right eye near PD and the left eye near PD transmitted from the spectacle store are designed using the above-described formulas (1) to (4). What is necessary is just to correct | amend according to the prescription value of a spectacles lens.

(Modification 3)
Note that the measurement by the parameter measuring apparatus 1 may be performed in a state where the spectacle wearer wears a spectacle frame without a spectacle lens. Also in this case, the parameter measuring apparatus 1 can correct the right eye near PD and the left eye near PD in the same manner as in the above-described embodiment. Alternatively, the spectacle wearer may perform the measurement by the parameter measuring device 1 while wearing spectacles with spectacle lenses with an arbitrary frequency. In this case, the parameter measuring device 1 corrects the right eye near PD and the left eye near PD based on the power of the glasses worn at the time of measurement and the prescription value of the spectacle wearer.

  The above description is merely an example, and is not limited to the configuration of the above embodiment. Moreover, you may combine the structure of each modification suitably with the said embodiment.

DESCRIPTION OF SYMBOLS 1 ... Parameter measuring device, 13 ... Camera for distance vision, 20 ... Main body computer, 31 ... Camera for near vision, 40 ... Touch panel type display

Claims (9)

A near vision imaging means for imaging a spectacle wearer in a near vision state;
A near vision parameter measurement unit that measures a near vision parameter related to the position of the eye in the near vision state based on the near vision image captured by the near vision imaging unit;
Input means for inputting the spectacle prescription value of the spectacle wearer;
Correction means for correcting the near vision parameter measured by the near vision parameter measurement means according to the spectacle prescription value input by the input means;
Equipped with a,
The near vision parameter includes a distance between pupils in a near vision state,
The correcting means calculates the power in the lateral direction of the spectacle lens prescribed from the spectacle prescription value, and in the near vision state measured by the near vision parameter measuring means according to the power in the lateral direction. A parameter measurement device that corrects the interpupillary distance . The parameter measurement device according to claim 1,
A far vision imaging means for imaging the spectacle wearer in a far vision state;
A distance vision parameter measuring means for measuring a distance vision parameter related to the position of the eye in the distance vision state based on a distance vision image captured by the distance vision imaging means;
Further comprising
The correction means includes a near vision parameter measured by the near vision parameter measurement means according to the spectacle prescription value inputted by the input means and the far vision parameter measured by the distance vision parameter measurement means. Rupa to correct the parameter measurement device. In the parameter measuring device according to claim 1 or 2,
Distance measuring means for measuring a near work distance, which is a distance from the spectacle wearer to the spectacle wearer's gazing point in the near vision state, based on the near vision image captured by the near vision imaging means Further comprising
The correction means determines the near vision parameter measured by the near vision parameter measurement means according to the eyeglass prescription value input by the input means and the near work distance measured by the distance measurement means. correction to Rupa parameter measurement device. In the parameter measuring device according to any one of claims 1 to 3,
The near vision parameter further includes at least one of a one- eye pupil distance, an inset amount, and a pupil height. In the parameter measuring device according to any one of claims 1 to 4,
The spectacle prescription values, a spherical power, cylindrical power, and at least Tsudea Rupa parameter measuring device of the astigmatic axis of. In the parameter measuring device according to any one of claims 1 to 5,
The spectacle wearer, wherein when captured by the near vision imaging means, the state der Rupa parameter measuring device wearing glasses that does not have power. A near vision image imaging step of imaging a spectacle wearer in a near vision state by an imaging means;
Based on the near vision image captured by the near vision image imaging step, a near vision parameter measuring step for measuring a near vision parameter related to the position of the eye in the near vision state;
A correction step of correcting the near vision parameter measured by the near vision parameter measurement step according to the spectacle prescription value of the spectacle wearer;
I have a,
The near vision parameter includes a distance between pupils in a near vision state,
The correction step calculates the power in the horizontal direction of the spectacle lens prescribed from the spectacle prescription value, and in the near vision state measured by the near vision parameter measurement step according to the power in the horizontal direction. A parameter measurement method for correcting the interpupillary distance . Eyeglass lens design how to design a spectacle lens using a near vision parameter measured by the parameter measuring device according to any one of claims 1 to 6. It measured near vision eyeglass lens manufacturing how to produce a spectacle lens designed using the parameter by parameter measurement device according to any one of claims 1 to 6.

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