Color vision characteristic measuring device, method for manufacturing eyeglass lenses, eyeglass lenses

Abstract

To provide a color vision characteristic measuring device that measures the color vision characteristics of the eyes of a subject.SOLUTION: A color vision characteristic measurement device for measuring a color vision characteristic of the eyes of a subject includes: a display unit for presenting a predetermined index to the subject; an illumination unit for irradiating the index with illumination light; a measurement unit for measuring at least one of a movement of the eye of the subject, brain waves, and a brain blood flow; and a control unit for controlling the display unit and the illumination unit. The control unit moves the index while changing the wavelength of the illumination light in a predetermined wavelength width, receives measurement results of the measurement unit for each wavelength of the illumination light, and measures the color vision characteristics on the basis of the measurement results.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a color vision characteristic measuring device for measuring the color vision characteristics of an eye of a subject, a method for manufacturing spectacle lenses for manufacturing spectacle lenses that correct color vision characteristics, and spectacle lenses manufactured by the manufacturing method.

Background Art

[0002] Conventionally, heterophoria measurement and subjective refraction measurement have been performed in hospitals and optical shops for patients and customers (users) who desire glasses. For example, in heterophoria measurement, an autorefractor for measuring eye refractive power, an autokeratometer for measuring corneal shape, etc. are used (for example, Patent Document 1), and in subjective refraction measurement, a target presentation device for presenting various targets, An ophthalmic examination device equipped with a phoropter that switches and applies lenses to the test eye to correct refractive power is used (for example, Patent Document 2).

[0003] Then, based on the measurement results of these eye refractive powers, a prescription power is determined, or a so-called trial frame examination is performed, such as confirming the difference in wearing comfort between the prescription power glasses and the glasses previously used, and glasses (spectacle lenses) that match the eye refractive power of the user are created.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, with these conventional examination methods and spectacle lens manufacturing methods, while spectacle lenses corresponding to the user's refractive power can be obtained (i.e., a predetermined corrected visual acuity can be achieved), other visual characteristics of the user's eye (e.g., color vision characteristics, wavelength vision characteristics) are not corrected, and discomfort or difficulty seeing caused by color vision characteristics, etc., cannot be eliminated.

[0006] This invention has been made in view of these circumstances, and its objectives are to provide a color vision characteristic measuring device for measuring the color vision characteristics of a subject's eyes, to provide a method for manufacturing spectacle lenses for producing spectacle lenses that correct color vision characteristics, and to provide spectacle lenses that correct color vision characteristics by such a manufacturing method. [Means for solving the problem]

[0007] To achieve the above objective, the color vision characteristic measuring device of the present invention is a color vision characteristic measuring device for measuring the color vision characteristics of a subject's eyes, comprising: a display unit that presents a predetermined index to the subject; an illumination unit that irradiates the index with illumination light; a measurement unit that measures at least one of the subject's eye movements, brain waves, or cerebral blood flow; and a control unit that controls the display unit and the illumination unit, wherein the control unit moves the index while changing the wavelength of the illumination light within a predetermined wavelength range, receives the measurement result from the measurement unit for each wavelength of the illumination light, and measures the color vision characteristics based on the measurement result.

[0008] Furthermore, it is desirable for the control unit to vary the wavelength of the illumination light from 400 nm to 900 nm within a wavelength range of 20 to 50 nm.

[0009] From another perspective, the color vision characteristic measuring device of the present invention is a color vision characteristic measuring device for measuring the color vision characteristics of a subject's eyes, comprising: a display unit that presents a predetermined index to the subject; a measurement unit that measures at least one of the subject's electroencephalogram or cerebral blood flow; and a control unit that controls the display unit and the illumination unit, wherein the control unit changes the color coordinates of the index, receives the measurement result from the measurement unit for each color coordinate of the index, and measures the color vision characteristics based on the measurement result.

[0010] Furthermore, it is desirable to have a colorimeter that measures the color coordinates of the indicators.

[0011] Furthermore, it is desirable to have an illumination unit that can change the color temperature of the illumination light, and for the control unit to change the color temperature of the illumination light according to the subject's request and generate a predetermined measurement environment.

[0012] From another perspective, the present invention relates to a method for manufacturing eyeglass lenses, comprising a lens substrate and an adhesive film formed on the surface of the lens substrate, and is characterized by including the steps of: presenting a predetermined indicator to a user who will be using eyeglass lenses; measuring the user's color vision characteristics by changing the wavelength of the illumination light that illuminates the indicator or by changing the color of the indicator; calculating a correction amount based on the measurement results of the color vision characteristics so that the color vision characteristics become substantially flat; selecting an absorbing dye to be used in the adhesive film and determining the concentration of the absorbing dye based on the correction amount; and forming the adhesive film on the lens substrate based on the selected absorbing dye and the determined concentration.

[0013] Furthermore, it is desirable that the step of calculating the correction amount be calculated so that the complementary color light is absorbed in the area where color vision characteristics are impaired.

[0014] Furthermore, it is desirable that the step of measuring color vision characteristics be performed by moving an indicator while changing the wavelength of the illumination light within a predetermined wavelength range, and measuring at least one of the user's eye movements, brain waves, or cerebral blood flow for each wavelength of illumination light.

[0015] Furthermore, it is desirable that the step of measuring color vision characteristics be performed by changing the color coordinates of the indicator and measuring at least one of the user's electroencephalogram or cerebral blood flow for each color coordinate of the indicator.

[0016] Furthermore, it is desirable that the steps of presenting the indicators and measuring color vision characteristics be performed at a pharmacy or optician, and that the steps of sending the measurement results to the spectacle lens manufacturer, calculating the correction amount, selecting an absorbing dye and determining the concentration of the absorbing dye, and forming the attached film on the lens substrate be performed at the spectacle lens manufacturer. In this case, it is also desirable that the measurement results of the step of measuring color vision characteristics be recorded over time at at least one of the pharmacy, optician, and manufacturer.

[0017] Furthermore, it is desirable that the steps of presenting indicators and measuring color vision characteristics be performed at the user's home via the internet, and that the steps of measuring color vision characteristics be performed at the eyeglass lens manufacturer, where the measurement results are sent to the eyeglass lens manufacturer, the steps of calculating the correction amount, selecting an absorbing dye and determining the concentration of the absorbing dye, and forming the attached film on the lens substrate are performed. In this case, it is also desirable that the measurement results of the color vision characteristics measurement step be recorded over time at the manufacturer.

[0018] From another perspective, the spectacle lens of the present invention is characterized by being manufactured by any of the spectacle lens manufacturing methods described above. In this case, it is desirable that the attached film is configured to be detachable from the lens substrate. [Effects of the Invention]

[0019] As described above, the present invention provides a color vision characteristic measuring device for measuring the color vision characteristics of a subject's eyes. Furthermore, it provides a method for manufacturing spectacle lenses that correct color vision characteristics. And, by such a manufacturing method, spectacle lenses that correct color vision characteristics are realized. [Brief explanation of the drawing]

[0020] [Figure 1] Figure 1 is a diagram illustrating the configuration of an eyeglass lens according to an embodiment of the present invention. [Figure 2] Figure 2 is a diagram showing an example of a color vision characteristic measurement device used for manufacturing spectacle lenses according to an embodiment of the present invention. [Figure 3] Figure 3 is a diagram for explaining the measurement image of the color vision characteristic measurement device of Figure 2 and the movement of the subject's eyes. [Figure 4] Figure 4 is a diagram showing an example of the measurement results obtained by the color vision characteristic measurement device of Figure 2. [Figure 5] Figure 5 is a diagram showing the correction amount (absorption rate) corresponding to the color vision characteristic of Figure 4. [Figure 6] Figure 13 is a diagram showing a modified example of the index of the measurement image of the color vision characteristic measurement device of Figure 2. [Figure 7] Figure 16 is a diagram showing a modified example of the measurement image of the color vision characteristic measurement device of Figure 2. [Figure 8] Figure 19 is a diagram for explaining a modified example of the adhesion film of the spectacle lens according to an embodiment of the present invention. [Figure 9] Figure 22 is a diagram showing the spectacle 55 for confirming the effect of the spectacle lens according to an embodiment of the present invention. [Figure 10] Figure 25 is a diagram for explaining another aspect of the measurement of the color vision characteristic of the color vision characteristic measurement device of Figure 2. [Figure 11] Figure 28 is a diagram for explaining a modified example of the color vision characteristic measurement device of Figure 2. [Figure 12] Figure 31 is a diagram for explaining the system until the spectacle lens according to an embodiment of the present invention is manufactured.

Embodiments for Carrying Out the Invention

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and their description will not be repeated.

[0022] Figure 1 is a diagram illustrating the configuration of an eyeglass lens 100 according to an embodiment of the present invention, where Figure 1(a) is a plan view, Figure 1(b) is a longitudinal cross-sectional view, and Figure 1(c) is an enlarged view of part A in Figure 1(b). The eyeglass lens 100 of this embodiment is an optical element that has power (power) corresponding to the refractive power of the user's eye and corrects the color vision characteristics of the user's eye. Generally, "color vision" refers to the sense related to color (primarily the visual sensation caused by differences in the light spectrum), but in this specification, the sense related to the wavelength of illuminating light is also called "wavelength vision."

[0023] As shown in Figure 1, the eyeglass lens 100 of this embodiment is a light-transmitting optical element having a disc-like shape, for example, with a diameter of 70 mm and a thickness of 3 mm. It consists of a plastic substrate 101 (transparent substrate) to which power (power) corresponding to the user's refractive power is applied, and an adhesive film 102 formed on one main surface of the plastic substrate 101 (the upper surface in Figure 1(b)).

[0024] [Plastic substrate] The plastic substrate 101 of this embodiment is a general lens blank, and specifically, it is formed from at least one selected from the group consisting of, for example, urethane-based thermosetting resin, (meth)acrylic-based thermosetting resin, polycarbonate resin, and polyamide resin. In this embodiment, a general lens blank is described as being used as the plastic substrate 101, but for example, the eyeglass lenses currently used by an eyeglass wearer may be used as the plastic substrate 101.

[0025] [Adhered film] The adhesive film 102 in this embodiment is a layer composed of a dye that absorbs light of a specific wavelength and a resin. The adhesive film 102 preferably includes, for example, one or more absorbing dyes and a transparent resin, in which the absorbing dyes are uniformly dissolved or dispersed in the transparent resin. Conventional known absorbent dyes can be used as the absorbent dyes constituting the attached film 102. For example, benzotriazole dyes (e.g., UV absorber for UV+420 manufactured by Mitsui Chemicals, Inc.), merocyanine dyes (e.g., FDB-006 manufactured by Yamada Chemical Industries, Ltd.), anthraquinone dyes (e.g., KP PLAST Green G, KP PLAST Red HB manufactured by Kiwa Chemical Industries, Ltd.), tetraazaporphyrin dyes (e.g., PD-311S manufactured by Yamamoto Kasei Co., Ltd.) can be used.

[0026] In addition to the visible light absorbing dye and transparent resin described above, the attached film 102 may also contain any other components such as color correcting dyes, leveling agents, antistatic agents, heat stabilizers, light stabilizers, antioxidants, dispersants, flame retardants, lubricants, and plasticizers, to the extent that they do not impair the effects of the present invention.

[0027] Thus, the adhesive film 102 of this embodiment is a layer formed on the plastic substrate 101 and configured to absorb light of a specific wavelength. As will be described later, an optimal dye is selected and used to correct the color vision characteristics of the wearer of the eyeglass lens 100 (i.e., according to the results of the color vision measurement). Therefore, by forming an adhesive film 102 on the plastic substrate 101, the user's color vision characteristics are corrected, and discomfort or difficulty seeing caused by color vision characteristics is eliminated. In this embodiment, the adhesive film 102 is formed on one main surface of the plastic substrate 101 (the upper surface in Figure 1(b)), but the configuration is not limited to this. The adhesive film 102 may also be formed on the other main surface of the plastic substrate 101 (the lower surface in Figure 1(b)), or on both sides of the plastic substrate 101. Furthermore, the adhesive film 102 does not necessarily have to be a single layer, but can be composed of multiple layers.

[0028] [Manufacturing method for eyeglass lens 100] In manufacturing the eyeglass lens 100 of this embodiment, first, the user's refractive power and color vision characteristics (wavelength vision characteristics) are measured, and the eyeglass lens 100 is manufactured based on these measurement results. The specific manufacturing method of the eyeglass lens 100 will be described below.

[0029] (1. Measurement of refractive power) In measuring ocular refractive power, conventional autorefractometers or phoropters are used to measure the user's refractive power (objective refraction measurement and subjective refraction measurement) and determine the prescription power.

[0030] (2. Measurement of color vision characteristics) Next, the color vision characteristics (wavelength vision characteristics) of the user's eyes are measured using the color vision characteristics measuring device 40. Figure 2 shows an example of the color vision characteristics measuring device 40 used to manufacture the eyeglass lens 100 of this embodiment. As shown in Figure 2, the color vision characteristic measuring device 40 includes a display 24 for presenting measurement images 15A and 15B to the subject 22 (user) in the measurement room 26, a camera 21 for detecting the eye movements of the subject 22, and an illumination 23 for irradiating the display 24 with light of a specific wavelength. Outside the measurement room 26, there is a control unit 25 that controls the display 24, camera 21, and illumination 23 and performs various calculations. By sequentially switching the wavelength of the illumination light from illumination 23 and sequentially switching the measurement images 15A and 15B, the color vision characteristics (wavelength vision characteristics) at each wavelength are measured. In this embodiment, the measurement of color vision characteristics (wavelength vision characteristics) is performed by the subject 22 wearing trial lenses (trial frames) with the prescription power obtained in "1. Measurement of refractive power," or wearing their currently used eyeglasses (eyeglass lenses), and viewing the measurement image displayed on the display 24 inside the color vision characteristic measuring device 40 through a viewing window (not shown) of the color vision characteristic measuring device 40. The lighting 23 is an LED bulb capable of emitting light of a specific wavelength; for example, the XWS-M (190nm~2500nm) tunable light from Isteq can be used.

[0031] Figure 3 illustrates the measurement images 15A and 15B displayed on the display 24 (Figures 3(a) and (b)) and the movement of the subject's eyes 11 detected by the camera 21 (Figures 3(c) and (d)). Note that in Figures 3(c) and (d), only one eye 11 is shown for the sake of explanation, but in this embodiment, the movement of both eyes is detected by two cameras 21. In measuring color vision characteristics (wavelength vision characteristics), the wavelength of the illumination light from the illumination 23 is sequentially switched, for example, from 400 nm to 900 nm, in wavelength ranges of 20 to 50 nm. Measurement images 15A, with a star-shaped indicator 10A on the left, and measurement image 15B, with a star-shaped indicator 10B on the right, are displayed in sequence (Figure 3(a), (b)), and the movement of the eye 11 at each wavelength of illumination light is detected by the camera 21 (Figure 3(c), (d)). The reaction speed of the eye 11 to the movement from indicator 10A to indicator 10B (i.e., the switch from measurement image 15A to measurement image 15B) is then determined from the movement of the eye 11 detected by the camera 21. If the reaction speed of the eye 11 is slower than the movement from indicator 10A to indicator 10B, it means that indicators 10A and 10B are difficult to see with that illumination light. Therefore, the reaction speed is a parameter that indicates the sensitivity of the eye 11. Therefore, in this embodiment, the sensitivity of the eye 11 at each wavelength of illumination light is calculated based on the reaction rate of the eye 11.

[0032] Figure 4 shows an example of measurement results obtained by the color vision characteristic measuring device 40, where the vertical axis represents the sensitivity (%) of the eye 11 and the horizontal axis represents the wavelength of the illumination 23. In the example shown in Figure 4, the sensitivity of the eye 11 decreases to 40% around 515 nm and to 80% around 565 nm, indicating that the sensitivity to wavelengths corresponding to green and yellow light is low.

[0033] (3. Calculation of color vision correction amount) Next, based on the measurement results in "2. Measurement of Color Vision Characteristics," the correction amount for color vision characteristics (wavelength vision characteristics) is calculated. Specifically, in the case of Figure 4, since the sensitivity of eye 11 is reduced at wavelengths corresponding to green and yellow light, the light absorption rate is calculated as the correction amount to correct this so that it becomes approximately flat. Figure 5 shows the correction amount (absorption rate) corresponding to the color vision characteristics (wavelength vision characteristics) in Figure 4. The vertical axis represents the sensitivity (%) of the eye 11, and the horizontal axis represents the wavelength of the illumination 23. In the case of Figure 4, the sensitivity of the eye 11 decreases by 40% for green light and by 80% for yellow light. To compensate for this, 60% of the complementary color of green (i.e., red (wavelength 675nm)) light is absorbed, and 20% of the complementary color of yellow (i.e., blue (wavelength 450nm)) light is absorbed.

[0034] (4. Selection of dyes for the attached film 102 and determination of the concentration of each dye) Next, based on the correction amount (absorption rate) obtained in "3. Calculation of color vision correction amount," the selection of dyes to be used in the adhesive film 102 and the concentration of each dye are determined. Specifically, in the case of Figure 5, it is necessary to absorb 60% of red light (wavelength 675nm) and 20% of blue light (wavelength 450nm). Therefore, a dye with a strong absorption peak around 675nm and a dye with a strong absorption peak around 450nm are selected, and the concentration (amount added) required to absorb 60% of red light (wavelength 675nm) and the concentration (amount added) required to absorb 20% of blue light (wavelength 450nm) are determined.

[0035] (5. Preparation of plastic substrate 101) Next, prepare the plastic base material 101 with the prescription power obtained in "1. Measurement of refractive power of the eye". Note that while a general lens blank can be used as the plastic base material 101, the eyeglass lens currently used by the eyeglass wearer may be used instead.

[0036] (6. Formation of the attached film 102) Next, an adhesive film 102 is formed on one of the main surfaces (the upper surface in Figure 1(b)) of the plastic substrate 101 prepared in "5. Preparation of Plastic Substrate 101". Specifically, the resin film-forming solution is prepared by dissolving or dispersing the dyes selected in "4. Selection of dyes for the attached film 102 and determination of the concentration of each dye," along with a transparent resin and optional compounding components, in a solvent. This solution is then applied, dried, and further cured as necessary to form the film. Furthermore, one or more coating methods selected from immersion coating, cast coating, spray coating, spin coating, inkjet coating, etc., can be used for applying the resin film-forming liquid.

[0037] Thus, the attached film 102 is a layer formed on the plastic substrate 101 and configured to absorb light of a specific wavelength. Depending on the user's color vision characteristics (i.e., according to the measurement results of their color vision characteristics (wavelength vision characteristics)), an optimal dye is selected to correct them, and the amount (concentration) added is calculated and used. Therefore, the formation of the adhesive film 102 corrects the user's color vision characteristics (wavelength vision characteristics), eliminating discomfort and difficulty seeing caused by color vision characteristics, etc. In this embodiment, the adhesive film 102 is formed on one main surface of the plastic substrate 101 (the upper surface in Figure 1(b)), but the configuration is not limited to this. The adhesive film 102 may also be formed on the other main surface of the plastic substrate 101 (the lower surface in Figure 1(b)), or on both sides of the plastic substrate 101. Furthermore, the adhesive film 102 does not necessarily have to be a single layer, but can be composed of multiple layers. Furthermore, the adhesive film 102 does not necessarily have to be fixed to the plastic substrate 101, and may be configured to be detachable (removable) from the plastic substrate 101.

[0038] The above describes embodiments of the present invention, but the present invention is not limited to the configuration of the above embodiments, and various modifications are possible within the scope of its technical concept.

[0039] (Variations of indicators 10A and 10B) For example, in the color vision characteristic measuring device 40 of this embodiment, the device is configured to present star-shaped indicators 10A and 10B to the user, but it is not necessarily limited to this configuration. Figure 6 shows modified examples of indicators 10A and 10B. Figure 6(a) is an index in which the line spacing gradually changes, and contrast sensitivity can be evaluated by assessing how far the lines can be recognized. Figure 6(b) shows 19 circular indicators densely arranged, and the user's eye movements may be measured by randomly lighting up, displaying, or changing the color or pattern of each indicator.

[0040] (Modified versions of measurement images 15A and 15B) Furthermore, in the color vision characteristic measuring device 40 of this embodiment, the color vision characteristics (wavelength vision characteristics) at each wavelength were measured by sequentially switching the wavelength of the illumination light of the illumination 23 and sequentially switching the measurement images 15A and 15B. However, the device is not necessarily limited to this configuration. Figure 7 shows modified versions of measurement images 15A and 15B. In Figure 7, a measurement image 15 is displayed on the display 24, in which two indicators 10 are arranged on the left and right sides. Light of different wavelengths is shone from light sources 23a and 23b of the illumination 23 toward each indicator 10. For example, light with a wavelength of 300 nm is shone from light source 23a toward the left indicator 10, and light with a wavelength of 375 nm is shone from light source 23b toward the right indicator 10, and the visibility is evaluated by comparing the two. Next, the wavelength of light from light source 23a is fixed, and the wavelength of light from light source 23b is changed by +75 nm increments, and the color vision characteristics (wavelength vision characteristics) are obtained by comparative evaluation of both indicators 10. Note that the comparative evaluation in this case may be a subjective evaluation by the subject 22, or it may be an evaluation by electroencephalography as described later. Furthermore, in this modified version, since the movement of the subject's eyes 11 is not detected, the camera 21 of the color vision characteristic measuring device 40 becomes unnecessary. In addition, because the subject's psychological and essential intentions are reflected, color vision characteristics (wavelength vision characteristics) can be measured more accurately.

[0041] (Variation of attached film 102) Furthermore, although the adhesive film 102 in this embodiment has been described as being formed and fixed on the plastic substrate 101, it is not limited to such a configuration. Figure 8 illustrates a modified example of the attached film 102. In this modified example, the adhesive film 102 contains silicone or the like as a transparent resin, is configured as a detachable component, and can be repeatedly attached to the eyeglasses 53.

[0042] Figure 8 is a perspective view showing the adhesive film 102 attached to the eyeglasses 53. The eyeglasses 53 comprises a frame 63 and two lenses 31 held in the frame 63, and the adhesive film 102, which corresponds to the user's color vision characteristics, is attached to the surface of the lenses 31. With this configuration, if correction of color vision characteristics (wavelength vision characteristics) is necessary (for example, when sunlight is dazzling outdoors and causes discomfort), the adhesive film 102 can be attached to the glasses 53 as needed. Furthermore, it is preferable that the adhesive film 102 is slightly smaller than the outer diameter of the lens 31 in order to facilitate attachment and removal. The adhesive film 102 may also be disposable.

[0043] Furthermore, such detachable adhesive films 102 can also be applied to eyeglasses for other uses. Figure 9 shows the glasses 55 used to verify the effect after "4. Selection of dyes for the attached film 102 and determination of the concentration of each dye" described above. The glasses 55 consist of a frame 63 and two lenses 64 held in the frame 63. The lenses 64 have a double structure separated by a slit 65, allowing the attached film 102 to be accommodated in the slit 65. Multiple types (for example, 15 types) of attached films 102 with different absorption wavelengths (i.e., different dyes and their concentrations) are prepared in advance. After "4. Selection of dyes for the attached film 102 and determination of the concentration of each dye" the attached film 102 created with the dyes and concentrations determined in "4. Selection of dyes for the attached film 102 and determination of the concentration of each dye" is selected and placed in the slit 65 to verify whether the result is correct. Then, the subject 22 can wear the glasses 55 with the attached film 102 housed in the slit 65 and confirm in advance whether the results of the color vision measurement (wavelength vision characteristics) are correct (i.e., whether the correction effect is obtained).

[0044] (Other aspects of "2. Measurement of color vision characteristics") In "2. Measurement of Color Vision Characteristics" of this embodiment, the reaction speed of the subject's eyes 11 was determined using the color vision characteristic measuring device 40, and the sensitivity of the eyes 11 to each wavelength of illumination light was calculated based on this reaction speed. However, the method (approach) is not necessarily limited to this. Figure 10 illustrates another aspect of "2. Measurement of color vision characteristics," and is an enlarged view of the subject 22 portion of the color vision characteristic measuring device 40 in Figure 2. In this embodiment, instead of detecting the movement of the subject's eyes 11 using the camera 21, the electroencephalogram, cerebral blood flow, or electrooculography of the subject 22 is measured using the measuring device 71, and the sensitivity of the eyes 11 at each wavelength of illumination light is calculated from these measurement results (information).

[0045] Specifically, when measuring electroencephalograms (EEGs), if the subject 22 is experiencing stress (i.e., if they find indicators 10A and 10B difficult to see), beta waves (14-23 Hz) are observed. If the subject 22 is relatively relaxed (i.e., if they can see indicators 10A and 10B clearly), alpha waves (α1: 7-8 Hz, α2: 9-11 Hz, α3: 12-13 Hz) are observed. Based on these measurements (for example, the ratio of alpha waves to beta waves), the sensitivity of the eye 11 at each wavelength of illumination light is calculated.

[0046] Furthermore, when measuring cerebral blood flow, cerebral blood flow tends to increase when the subject 22 is stressed (i.e., when they find indicators 10A and 10B difficult to see) and decrease when the subject 22 is relatively relaxed (i.e., when they can see indicators 10A and 10B well). Therefore, the sensitivity of the eye 11 at each wavelength of illumination light is calculated based on the measured cerebral blood flow.

[0047] Furthermore, when measuring electrooculography (EO), if the subject 22 is stressed (i.e., if they find it difficult to see indicators 10A and 10B), the changes in EEO tend to be slower, and if the subject 22 is relatively relaxed (i.e., if they can see indicators 10A and 10B well), the changes in EEO tend to be faster. Therefore, the sensitivity of the eye 11 at each wavelength of illumination light is calculated based on the changes in EEO. For the measuring device 71, for example, an electroencephalogram (EEG) sensor manufactured by ProAssist Co., Ltd. or an EEG sensor manufactured by PGV Co., Ltd. can be used. In addition, a system for measuring biological information (brain information) manufactured by Little Software Co., Ltd. can also be used. In this embodiment, since it is not necessary to detect the eye movements of the subject 22, the camera 21 (Figure 2) is unnecessary.

[0048] (Modified version of the color vision characteristic measuring device 40) In "2. Measurement of Color Vision Characteristics" of this embodiment, the sensitivity of the eye 11 at each wavelength was calculated by sequentially switching the wavelength of the illumination light of the illumination 23 using the color vision characteristic measuring device 40 and sequentially switching the measurement images 15A and 15B. However, the color vision characteristic measuring device 40 is not necessarily limited to this configuration. Figure 11 illustrates a modified example of the color vision characteristic measuring device 40. Figure 11(a) shows a cross-sectional view of the color vision characteristic measuring device 40, and Figures 11(b) and (c) show examples of measurement images 15 displayed on the display 24 of the color vision characteristic measuring device 40.

[0049] As shown in Figure 11, this modified color vision characteristic measuring device 40 includes, in the measuring room 26, a display 24 for presenting a measurement image 15 to the subject 22 (user), a light 23 for illuminating the measuring room 26 at a predetermined color temperature, and a colorimeter 72. Outside the measuring room 26, there is a measuring instrument 71 for detecting the brain waves of the subject 22, and a control unit 25 that controls the display 24, the light 23, and the measuring instrument 71 and performs various calculations. Under predetermined illumination by the light 23, the color vision characteristics of the subject 22 (user) are measured while changing the colors of the indicators 10 and background 90 of the measurement image 15.

[0050] In this modified example, the color vision characteristics are measured using the color vision characteristics measuring device 40 by the subject 22, who is wearing trial lenses (trial frames) with the prescription power obtained in "1. Measurement of Refractive Power" above, or their currently used eyeglasses (eyeglass lenses), looking at the measurement image displayed on the display 24 inside the color vision characteristics measuring device 40 through a viewing window (not shown) of the color vision characteristics measuring device 40. Furthermore, the lighting 23 uses an LED bulb with adjustable color temperature, and specifically, it is set to one of the following colors depending on the environmental conditions desired by the subject 22 (for example, lighting in a living space or work area): incandescent color (2800K), warm white (3500K), white (4200K), neutral white (5000K), or daylight color (6500K). Specifically, the environmental conditions include, for example: "1. Outdoor mode (assuming sunny weather, outdoor work or sports): Daylight color (6500K)", "2. Office mode (assuming typical office desk work): Neutral white (5000K)", "3. Living room mode (assuming typical living room reading or watching TV): White (4200K)", "4. Sunset mode (assuming evening outdoors and cloudy weather): Warm white (3500K)", and "5. Night mode (assuming nighttime outdoors or night driving use): Incandescent color (2800K)".

[0051] The colorimeter 72 is a device that quantifies the display on the display 24 (i.e., the measurement image 15) in the Lab color space. For example, the PPLB-500B colorimeter manufactured by Papalabo Co., Ltd. can be used as the colorimeter 72.

[0052] In measuring color vision characteristics, a measurement image 15, as shown in Figure 11(b) or Figure 11(c), is displayed on the display 24 of the color vision characteristic measuring device 40. The measurement image 15 in Figure 11(b) includes an index 10 and a background 90. In measuring color vision characteristics, the color coordinates of index 10 and background 90 are changed relatively little by little (for example, by changing the value of the b or a value), and the color coordinates of index 10 and background 90 in the measurement image 15 are measured using a colorimeter 72, while the electroencephalogram (EEG) of the subject 22 is measured using a measuring device 71. Then, the sensitivity of the eye 11 at each color coordinate is calculated from the EEG measurement results (information). The measurement image 15 in Figure 11(c) contains indicators 10a to 10g, each with different color coordinates. In measuring color vision characteristics using this measurement image 15, the ability to recognize color differences between adjacent indicators is measured by the electroencephalogram (EEG) of the subject 22. Then, the sensitivity of the eye 11 at each color coordinate is calculated from the EEG measurement results (information).

[0053] Once the sensitivity of the eye 11 at each color coordinate is calculated, the brightness and chromaticity that are difficult for the subject 22 to perceive can be determined. Therefore, based on this chromaticity data, the dyes to be used in the adhesive film 102 can be selected, and based on the brightness data, the concentration of each dye can be determined.

[0054] In the above embodiments, color vision or wavelength vision was measured using various methods, but it is preferable to have a recording step for recording the measurement results. By recording the measurement results, the data can be used as a reference when manufacturing eyeglasses in the future.

[0055] (The system for manufacturing eyeglass lenses 100) Figure 12 is a diagram illustrating the system involved in the manufacturing of eyeglass lenses 100. Users who desire eyeglass lenses 100 include patients 41 with eye diseases and other members of the general public. If the user is patient 41, patient 41 will consult a clinic 43. In this case, clinic 43 will refer the user to a pharmacy 44 or an eyeglass store 45.

[0056] If a user who desires eyeglass lenses 100 is an ordinary person 42, the ordinary person 42 will consult one of the following: a pharmacy 44, an eyeglass store 45, or the internet 46. At the pharmacy 44 and the eyeglass store 45, the "2. Measurement of color vision characteristics" described above is performed using the color vision characteristic measuring device 40. The results are then sent to the manufacturing company 52, where the "3. Calculation of the correction amount for color vision characteristics," "4. Selection of pigments for the adhesive film 102 and determination of the concentration of each pigment," "5. Preparation of the plastic substrate 101," and "6. Formation of the adhesive film 102" are performed to create the eyeglass lens 100.

[0057] Internet 46 is an example of communication with a manufacturing company 52 via the internet. This case will be explained below.

[0058] (1) Measurement of color vision characteristics The general public 42 interacts with the manufacturing company 52 via the internet from their homes or other locations. Then, for example, they have their color vision characteristics measured online on a website.

[0059] <Measurement (1)> For example, when measuring the color vision characteristics shown in Figure 2, measurement images 15A and 15B are provided to the computer displays of 42 ordinary people. The eye movements while viewing measurement images 15A and 15B are captured by a webcam connected to the personal computer of a civilian 42 and transmitted to the manufacturing company 52, where the reaction speed of the eye 11 is measured. The wavelength of the illumination light illuminating the measurement images 15A and 15B is sequentially changed by the manufacturing company 52. ​​In this way, by using the internet, measurements similar to those for color vision characteristics shown in Figure 2 can be performed.

[0060] <Measurement (2)> For example, when measuring color vision characteristics using electroencephalography (EEG) as shown in Figure 10, measurement images 15A and 15B are provided for each wavelength, similar to measurement (1), and cerebral blood flow measurement (NIRS), EEG, etc., are performed. The measuring device 71 is mailed to the general public 42 in advance. Once the measurement is complete, the measurement data is saved in the measuring device 71 and the measuring device 71 is returned to the manufacturer 52. The manufacturer 52 retrieves the data from the returned measuring device 71. The measurement data may also be transmitted to the manufacturer 52 via the internet.

[0061] (2) Formation of the attached film 102 At the manufacturing company 52, the adhesive film 102 is determined according to the measurement data, and the adhesive film 102 is formed on the plastic substrate 101, or the adhesive film 102 is formed on the eyeglasses 53 that have been mailed to the manufacturing company 52 in advance, and the finished product (eyeglass lens 100, eyeglasses 53, or adhesive film 102) is sent to the general public 42.

[0062] Thus, this system allows for the easy manufacture of eyeglass lenses 100 (eyeglasses 53 or attached film 102) via the internet, enabling smoother delivery to users.

[0063] It should be noted that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0064] 10: Indicator 10A: Indicator 10B: Indicator 10a: Indicator 10b :Indicator 10c: Indicator 10d: Indicator 10e: Indicator 10f :Indicator 10g :Indicator 11:Eye 15: Measurement image 15A: Measurement image 15B: Measurement image 21: Camera 22: Subject 23: Lighting 23a: Light source 23b: Light source 24: Display 25: Control Unit 26:Measurement room 31: Lens 40: Color vision characteristic measuring device 41 :Patient 42: Ordinary person 43:Clinic 44: Pharmacy 45: Eyeglass store 46: Internet 52: Manufacturing company 53: Glasses 55: Glasses 63: Frame 64: Lens 65: Slit 71: Measuring tools 72: Colorimeter 90: Background 100: Eyeglass lenses 101: Plastic substrate 102: Adhered film

Claims

1. A color vision characteristic measuring device for measuring the color vision characteristics of a subject's eyes, A display unit that presents a predetermined indicator to the subject, An illumination unit that irradiates illumination light onto the aforementioned indicator, A measuring unit that measures at least one of the subject's eye movements, electroencephalogram, or cerebral blood flow, A control unit that controls the display unit and the illumination unit, Equipped with, The control unit, While changing the wavelength of the illumination light within a predetermined wavelength range, the indicator is moved. The measurement unit receives the measurement result for each wavelength of the illumination light. Based on the above measurement results, the color vision characteristics are measured. A color vision characteristic measuring device characterized by the following features.

2. The color vision characteristic measuring device according to claim 1, characterized in that the control unit changes the wavelength of the illumination light from 400 nm to 900 nm in a wavelength range of 20 to 50 nm.

3. A color vision characteristic measuring device for measuring the color vision characteristics of a subject's eyes, A display unit that presents a predetermined indicator to the subject, A measuring unit that measures at least one of the subject's electroencephalogram or cerebral blood flow, A control unit that controls the display unit and the illumination unit, Equipped with, The control unit, By changing the color coordinates of the aforementioned indicator, The measurement unit receives the measurement result for each color coordinate of the index, and measures the color vision characteristics based on the measurement result. A color vision characteristic measuring device characterized by, It also features a lighting unit that allows you to change the color temperature of the light, The control unit is characterized by changing the color temperature of the illumination light in response to the subject's request and generating a predetermined measurement environment, thereby providing a color vision characteristic measuring device.

4. The color vision characteristic measuring device according to claim 3, further comprising a colorimeter for measuring the color coordinates of the aforementioned indicators.

5. A method for manufacturing an eyeglass lens, comprising a lens substrate and an adhesive film formed on the surface of the lens substrate, The steps include presenting a predetermined indicator to the user of the aforementioned eyeglass lenses, A step of measuring the user's color vision characteristics by changing the wavelength of the illumination light that illuminates the indicator, or by changing the color of the indicator. A step of calculating a correction amount based on the measurement results of the color vision characteristics so that the color vision characteristics become approximately flat, Based on the correction amount, the steps include selecting an absorbing dye to be used in the attached film and determining the concentration of the absorbing dye, The steps include forming the attached film on the lens substrate based on the selected absorbing dye and the determined concentration, A method for manufacturing eyeglass lenses, including the invention of the invention.

6. The method for manufacturing eyeglass lenses according to claim 5, wherein the step of calculating the correction amount is to calculate the correction amount so as to absorb the complementary color light of the portion where the color vision characteristics are reduced.

7. The step of measuring the aforementioned color vision characteristics is: While changing the wavelength of the illumination light within a predetermined wavelength range, the indicator is moved. The color vision characteristics are measured by measuring at least one of the user's eye movements, brain waves, or cerebral blood flow for each wavelength of the illumination light. A method for manufacturing eyeglass lenses according to claim 5 or claim 6.

8. The step of measuring the aforementioned color vision characteristics is: By changing the color coordinates of the aforementioned indicator, The color vision characteristics are measured by measuring at least one of the user's electroencephalogram or cerebral blood flow for each color coordinate of the aforementioned index. A method for manufacturing eyeglass lenses according to claim 5 or claim 6.

9. The steps of presenting the aforementioned indicators and measuring the aforementioned color vision characteristics are performed at a pharmacy or eyeglass store. The step of measuring the color vision characteristics involves transmitting the measurement results to the eyeglass lens manufacturer. The steps of calculating the correction amount, selecting the absorbing dye and determining the concentration of the absorbing dye, and forming the attached film on the lens substrate are performed by the manufacturer of the eyeglass lens. A method for manufacturing eyeglass lenses according to any one of claims 5 to 8.

10. The method for manufacturing eyeglass lenses according to claim 9, characterized in that the measurement results of the step of measuring the color vision characteristics are recorded over time at at least one of the pharmacy, the eyeglass retailer, and the manufacturing company.

11. The steps of presenting the aforementioned indicators and measuring the aforementioned color vision characteristics are performed at the user's home via the internet. The step of measuring the color vision characteristics involves transmitting the measurement results to the eyeglass lens manufacturer. The steps of calculating the correction amount, selecting the absorbing dye and determining the concentration of the absorbing dye, and forming the attached film on the lens substrate are performed by the manufacturer of the eyeglass lens. A method for manufacturing eyeglass lenses according to any one of claims 5 to 8.

12. The method for manufacturing eyeglass lenses according to claim 11, characterized in that the measurement results of the step for measuring the color vision characteristics are recorded over time at the manufacturing company.

13. An eyeglass lens characterized by being manufactured by the method for manufacturing eyeglass lenses described in any one of claims 5 to 12.

14. The spectacle lens according to claim 13, characterized in that the adhering film is configured to be detachably attached to the lens substrate.

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