WO2024247878A1 - Ophthalmic transmissive optical article set, ophthalmic lens set, ophthalmic transmissive optical article, and spectacles - Google Patents

Abstract

The purpose of the present invention is to provide an ophthalmic transmissive optical article set, capable of improving visual contrast particularly in a dimly lit environment, while suppressing a sense of strangeness of appearance. An ophthalmic transmissive optical article set according to the present disclosure comprises two ophthalmic transmissive optical articles, at least one of the two ophthalmic transmissive optical articles having a photochromic layer including a photochromic compound or a reverse photochromic layer including a reverse photochromic compound, and requirement 1 and requirement 2.　Requirement 1: In a state in which the photochromic layer is decolored or in a state in which the reverse photochromic layer is colored, the color difference ΔE00 of the two ophthalmic transmissive optical articles is more than 0.23 and less than 33.8.　Requirement 2: In a state in which the photochromic layer is colored or in a state in which the reverse photochromic layer is decolored, the color difference ΔE00 of the two ophthalmic transmissive optical articles is 7.4 or less.

Description

Ophthalmic transmissive optical article set, ophthalmic lens set, ophthalmic transmissive optical article, and spectacles

The present disclosure relates to an ophthalmic transmissive optical article set, an ophthalmic lens set, an ophthalmic transmissive optical article, and eyeglasses.

Patent Document 1 describes a plastic eyeglass lens consisting of a plastic lens wafer formed from a urethane-based thermosetting resin, a (meth)acrylic-based thermosetting resin, a polycarbonate resin, or a polyamide resin, or a plastic eyeglass lens consisting of a plastic wafer and one or more component layers formed on at least one side of the plastic wafer, characterized in that at least one of the plastic wafer and the component layers contains an organic dye that satisfies the following condition (A):
Condition (A): In a visible light absorption spectrum measured on a chloroform or toluene solution of an organic dye, the dye has a main absorption peak (P) between 565 nm and 605 nm, the absorption coefficient of the peak apex (Pmax) of the main absorption peak (P) is 0.5 x ¹⁰⁵ (ml/g cm) or more, the peak width at 1/4 of the absorbance of the peak apex (Pmax) of the main absorption peak (P) is 50 nm or less, the peak width at 1/2 of the absorbance of the peak apex (Pmax) of the main absorption peak (P) is 30 nm or less, and the peak width at 2/3 of the absorbance of the peak apex (Pmax) of the main absorption peak (P) is 20 nm or less.

JP 2013-61653 A

The present disclosure relates to a set of ophthalmic transmissive optical articles consisting of two ophthalmic transmissive optical articles, at least one of which has a photochromic layer containing a photochromic compound or an inverse photochromic layer containing an inverse photochromic compound, in which, in a specific state described below, the color difference ΔE00 of the two ophthalmic transmissive optical articles calculated based on CIEDE2000 when CIE standard illuminant D65 with a 2-degree field of view is used as the reference light is greater than 0.23 and less than 33.8, and in a state different from the above conditions described below, the color difference ΔE00 of the two ophthalmic transmissive optical articles calculated based on CIEDE2000 is 7.4 or less when CIE standard illuminant D65 with a 2-degree field of view is used as the reference light.

FIG. 1 is a perspective view of one embodiment of a pair of eyeglasses having a set of ophthalmic transmissive optical articles. FIG. 1 is a perspective view of one embodiment of an ophthalmic transmissive optical article.

The ophthalmic transmission type optical article set of this embodiment will be described in detail below.
As the ocular transmission type optical article set, an ocular transmission type optical article set capable of improving visual contrast is desired. Here, in a bright environment, the contrast between light and dark of the object to be viewed is strong, whereas in a dim environment, the contrast between light and dark of the object to be viewed is likely to be weak. Therefore, in a dim environment, it is desirable to have a high effect of improving visual contrast. In addition, when the ocular transmission type optical article set is, for example, an ocular lens set consisting of two ocular lenses, if the two ocular lenses are given different colors, the color difference is noticeable in a bright environment, which is likely to cause an uncomfortable appearance.
The ocular transmission type optical article set of the present embodiment has the property of improving visual contrast, particularly in dim environments, while suppressing any discomfort in appearance.
In this specification, the word "to" is used to mean that the numerical values before and after it are included as the lower limit and upper limit.

<Set of transmissive optical articles for eyes>
An example of the ocular transmission type optical article set is an ocular transmission type optical article set (ocular lens set) 10 used for eyeglasses 1 shown in Fig. 1. Specifically, the ocular transmission type optical article set includes a right eye spectacle lens 11 and a left eye spectacle lens 12.
In FIG. 1, the glasses 1 include an ophthalmic transmissive optical article set (ophthalmic lens set) 10 consisting of a right-eye spectacle lens 11 and a left-eye spectacle lens 12, and a spectacle frame 14 in which the right-eye spectacle lens 11 and the left-eye spectacle lens 12 are mounted.
That is, the ocular transmission type optical article set 10 consisting of the right-eye spectacle lens 11 and the left-eye spectacle lens 12 is an ocular transmission type optical article set and an ocular lens set in the present disclosure. Also, the right-eye spectacle lens 11 and the left-eye spectacle lens 12 are ocular transmission type optical articles, ocular lenses, and spectacle lenses in the present disclosure.

The eyeglass frame 14 is a conventionally known eyeglass frame having a pair of lens frames in which the right-eye eyeglass lens 11 and the left-eye eyeglass lens 12 are respectively mounted, and temples for hanging the eyeglass frame on the user's ears.

In the ophthalmic transmissive optical article set (ophthalmic lens set) 10 of the present disclosure, the following requirements 1 and 2 are satisfied with respect to the color difference in L ^* a ^* b ^* display between the right-eye spectacle lens 11 and the left-eye spectacle lens 12.
Requirement 1: When at least one of the two ocular transmissive optical articles (the right-eye spectacle lens 11 and the left-eye spectacle lens 12) has the photochromic layer, in a state in which the photochromic layer is faded, and when at least one of the two ocular transmissive optical articles has the reverse photochromic layer, in a state in which the reverse photochromic layer is colored, the color difference ΔE00 between the two ocular transmissive optical articles (the right-eye spectacle lens 11 and the left-eye spectacle lens 12) calculated based on CIEDE2000 is greater than 0.23 and less than 33.8 when CIE standard illuminant D65 with a 2-degree visual field is used as the reference light.
Requirement 2: When at least one of the two ocular transmissive optical articles (the right-eye spectacle lens 11 and the left-eye spectacle lens 12) has the photochromic layer, in a state in which the photochromic layer is colored, and when at least one of the two ocular transmissive optical articles has the reverse photochromic layer, in a state in which the reverse photochromic layer is faded, the color difference ΔE00 between the two ocular transmissive optical articles (the right-eye spectacle lens 11 and the left-eye spectacle lens 12) calculated based on CIEDE2000 is 7.4 or less when CIE standard illuminant D65 with a 2-degree visual field is used as the reference light.
In this disclosure, the color difference between two eyeglass lenses is a color difference ΔE00 in which coefficients corresponding to the lightness, saturation, and hue values are introduced in order to correct the visual non-uniformity of CIELAB.

That is, in the ophthalmic transmissive optical article set (ophthalmic lens set) 10 of the present disclosure, in the state of requirement 1 (under darker conditions), the color difference ΔE00 is more than 0.23 and less than 33.8. In addition, in the state of requirement 2 (under brighter conditions), the color difference ΔE00 is 7.4 or less.
The above-mentioned change in color difference ΔE00 is achieved by at least one of the sets of ocular transmission type optical articles including a photochromic layer or a reverse photochromic layer. Here, in a lens including a photochromic layer or a reverse photochromic layer, the color is different between the state of requirement 1 and the state of requirement 2. Note that the photochromic layer is a layer including a photochromic compound, and the reverse photochromic layer is a layer including a reverse photochromic compound.
Photochromic compounds and reverse photochromic compounds are compounds whose color changes when irradiated with light. As photochromic compounds, compounds that change color when irradiated with light are preferred. As reverse photochromic compounds, compounds that fade when irradiated with light are preferred. Photochromic compounds and reverse photochromic compounds will be described in detail later.

The coordinates in the L ^* a ^* b ^* display change depending on the reference light source. In this disclosure, values calculated using the CIE standard illuminant D65 with a 2-degree field of view, which is standard for outdoor daylight, are used as the reference light.
The inventors have discovered that the effect of improving visual contrast can be obtained by setting the color difference ΔE00 of the two eyeglass lenses constituting the ophthalmic transmission type optical article set (ophthalmic lens set) 10 within the above range in the state of requirement 1.
In addition, it has been found that, in the state of requirement 2, by setting the color difference ΔE00 between the two eyeglass lenses within the above range, it is possible to reduce the sense of discomfort in appearance when worn.

In order to obtain the effect of improving visual contrast, the colors of the two spectacle lenses need to have a color difference that allows humans to recognize them as different colors. From this viewpoint, in the state of requirement 1, the color difference ΔE00 in the L ^* a ^* b ^* display of the two spectacle lenses (a spectacle lens for the left eye and a spectacle lens for the right eye) is more than 0.23, more preferably 0.4 or more, and even more preferably 0.6 or more.
On the other hand, if the color difference is too large, binocular rivalry may occur, causing discomfort. Therefore, in the state of requirement 1, the color difference ΔE00 is less than 33.8, more preferably 20.0 or less, and even more preferably 15.0 or less.

For example, in conventional glasses, the two spectacle lenses are generally the same color, and therefore, if the colors of the two spectacle lenses are different, it may cause a visual discomfort to people around. Furthermore, the discomfort is more noticeable in bright places. From this viewpoint, in the state of requirement 2, the color difference ΔE00 in the L ^* a ^* b ^* display of the two spectacle lenses (a spectacle lens for the left eye and a spectacle lens for the right eye) is 7.4 or less, more preferably 5.0 or less, and even more preferably 1.6 or less. The lower limit of the color difference ΔE00 in the state of requirement 2 is not particularly limited and may be 0.0.

The color difference in the L ^* a ^* b ^* display can be determined by measuring the L ^* a ^* b ^* coordinates of each eyeglass lens with a spectrophotometer (e.g., U-4100 manufactured by Hitachi High-Technologies Corporation and DOT-41 manufactured by Murakami Color Research Laboratory) using a D65 light source (field of view 2 degrees) as the reference light, and calculating the color difference ΔE00 from the obtained L ^* a ^* b ^* coordinates of the two eyeglass lenses.
Here, the colored state of the photochromic layer refers to the state immediately after the photochromic compound is irradiated with light that colors the photochromic compound and the coloring is saturated, and the faded state of the photochromic layer refers to the state immediately after the eyeglass lens is placed in a light-shielding container with a total light transmittance of 5% or less and left at 23° C. for 3 hours.
The above-mentioned "discolored state of the reverse photochromic layer" refers to the state immediately after the reverse photochromic compound is irradiated with light that discolors the reverse photochromic compound and the discoloration does not progress any further. The above-mentioned "colored state of the photochromic layer" refers to the state immediately after the eyeglass lens is placed in a light-shielding container with a total light transmittance of 5% or less and left at 23°C for 3 hours.
The measurement under the condition of requirement 1 and the measurement under the condition of requirement 2 are carried out immediately after the photochromic layer and the reverse photochromic layer are brought into a colored or faded state.

An example of a specific measurement procedure is shown below. A spectrophotometer equipped with an integrating sphere (U-4100 manufactured by Hitachi High-Technologies Corporation) measures reference light without a sample, and then places the convex surface of the eyeglass lens facing the incident light side and measures the transmitted light to measure the spectral transmittance of the eyeglass lens. The light beam size at the sample position is approximately 11 mm vertical x 8 mm horizontal, the measurement wavelength range is 380 to 780 nm, the scan speed is 300 nm/min, the sampling interval is 0.50 nm, the number of measurements is 1, and the slit width is 5 nm.
Next, from the obtained spectral transmittance, the luminous transmittance Y value, and the L ^* value, a* value, and ^{b *} value when the D65 light source (visual field of 2 degrees) is used as the reference light are calculated using a color calculation program provided in the U-4100.
Finally, the color difference ΔE00 was calculated based on the calculation method described in Gaurav Sharma, et. al., The CIEDE2000 Color-Difference Formula: Implementation Notes, Supplementary Test Data, and Mathematical Observations, COLOR research and application, Volume 30, Number 1, February 2003. 2005) and a spreadsheet distributed by the authors of said document (http://www2.ece.rochester.edu/~gsharma/ciede2000/), the L ^* value, a ^* value, and b* value of the two eyeglass lenses previously measured are used to calculate the L* value, a* value, and b ^* value.
The above measurement is carried out under the condition of 23°C.
The above measurement may be performed using a spectrophotometer equipped with an integrating sphere (DOT-41 manufactured by Murakami Color Research Laboratory Co., Ltd.). When performing the measurement using the above spectrophotometer, the reference light is measured in the absence of a sample, and then the concave surface of the eyeglass lens is placed facing the incident light side to measure the transmitted light, thereby measuring the spectral transmittance of the eyeglass lens. The measurement area is a circle with a diameter of about 4 mm, the measurement wavelength range is 380 to 780 nm, the sampling interval is 5 nm, and the number of measurements is 1. Next, from the obtained spectral transmittance, the luminous transmittance Y value, and the L ^* value, a ^* value, and b ^* value when the D65 light source (visual field 2 degrees) is used as the reference light are calculated using a color calculation program provided in the DOT-41.

Moreover, the measurement of the spectral transmittance of a spectacle lens may be performed at the optical center of the spectacle lens. This is the same for non-prescription spectacle lenses because the lenses have a curved surface. Moreover, since the optical center and the geometric center of a spectacle lens before edging are in the same position, the measurement may be performed at the geometric center in the case of a spectacle lens before edging.
Furthermore, in the case where the eyeglass lenses are progressive lenses, measurements are performed at any one or more of the prism reference point, the distance measurement point, and the near measurement point, and the color difference ΔE00 between the two eyeglass lenses (progressive lenses) at each position needs to satisfy the above-mentioned requirements 1 and 2.
In the case of an ocular transmission type optical article (goggles) having two regions, described later, two points in the left and right directions at the center in the vertical direction of the ocular transmission type optical article are defined as the optical centers of the respective regions. The distance between these two points is 64 mm±10 mm for adults and 50 mm±10 mm for children, with the center of the ocular transmission type optical article as the base point. The spectral transmittance can be measured by setting these two points as the optical centers of the two regions.

Here, when the two spectacle lenses have a color difference, there are no particular restrictions on the color density of the spectacle lenses, i.e., the luminous transmittance of the lenses, and as long as the above requirement 1 is satisfied with respect to the color difference ΔE00 between the two spectacle lenses, it is possible to obtain the effect of improving visual contrast while suppressing the occurrence of binocular rivalry.
Furthermore, if the above requirement 2 is satisfied with respect to the color difference ΔE00 between the two eyeglass lenses, the sense of discomfort felt by people around the wearer can be reduced.

If the visual transmittance of the two spectacle lenses is too low, even if the visual contrast is improved by the effect of the present disclosure, good visual acuity is difficult to obtain due to the small amount of light entering the eye. From the above viewpoint, the visual transmittance of each of the two spectacle lenses is preferably 3% or more, more preferably 18% or more, even more preferably 43% or more, and particularly preferably 80% or more. As will be described later, fluorescent dyes and phosphorescent dyes can also be used to dye the spectacle lenses, in which case the visual transmittance of the spectacle lenses may exceed 100%. The upper limit of the visual transmittance of the two spectacle lenses is often 120% or less, and more often 110% or less.

The visual transmittance of the two spectacle lenses may be the same or different. If the difference in visual transmittance between the two spectacle lenses is large, it may affect binocular stereoscopic vision due to the Pulfrich effect, so it is preferable that the difference in visual transmittance between the two spectacle lenses is small, preferably 70% or less, more preferably 50% or less, and even more preferably 30% or less.

Luminous transmittance can be measured by the method described above. It can also be calculated from the spectral transmittance measured by a spectrophotometer (e.g., Hitachi High-Technologies Corporation U-4100) in accordance with JIS T7333:2018.

Here, there are no particular limitations on the colors of the two spectacle lenses, so long as the color difference ΔE00 satisfies the above requirements 1 and 2. For example, in a purple-blue spectacle lens that is said to have a visual contrast improving effect as described in Patent Document 1, by toning the color of the two spectacle lenses so that the color difference ΔE00 of the two spectacle lenses exceeds 0.23 under the condition of requirement 1, the visual contrast improving effect can be further enhanced.
The color can also be selected according to the preference of the spectacle lens wearer. Since the colors of the two spectacle lenses are mixed in the brain to produce an intermediate color, it is preferable that the colors of the two spectacle lenses are located opposite each other with the target color in between in the L ^* a ^* b ^* color system. It is more preferable that the colors of the two spectacle lenses are located opposite each other with the target color in between in the state of requirement 1.
Furthermore, it is also preferable that the colors of the two eyeglass lenses are in a physically complementary relationship. This is because when the images entering the left and right eyes are mixed in the brain, they become achromatic (gray) and the sense of incongruity is reduced. Note that physically complementary colors are colors that are complementary (have a mutually complementary relationship), and are colors that are located directly opposite each other across the origin in the L ^* a ^* b ^* color system. In the present disclosure, it is also preferable to adjust the colors of the two eyeglass lenses to be physically complementary in the state of requirement 1.
Specifically, for example, it is preferable to select two colors that are physically complementary to each other, such as red and cyan, green and magenta, or blue and yellow, as the color combination of the two eyeglass lenses. Among these, from the viewpoint of reducing the influence of color when viewed with one eye, such as when blinking, it is preferable not to use yellow-based colors that are psychologically stimulating, that is, colors with a large positive b ^* value, and it is more preferable to select the color combination of the two eyeglass lenses from reddish colors, blueish colors, greenish colors, and intermediate colors therebetween.
In addition, reddish colors are colors whose a ^* value is large on the positive side in the L ^* a ^* b ^* color system, greenish colors are colors whose a ^* value is large on the negative side, and blueish colors are colors whose b ^* value is large on the negative side.

In the state of requirement 1, both of the two spectacle lenses may be chromatic, or one spectacle lens may exhibit a chromatic color and the other spectacle lens may exhibit an achromatic color.
Also, in the state of requirement 2, both of the two eyeglass lenses may be chromatic, one eyeglass lens may exhibit a chromatic color and the other eyeglass lens may exhibit an achromatic color, or both of the two eyeglass lenses may exhibit an achromatic color.
At least one of the two spectacle lenses may contain a dye other than the photochromic compound and the reverse photochromic compound in addition to the photochromic layer and the reverse photochromic layer. That is, at least one of the two spectacle lenses may have a colored layer that exhibits color. Hereinafter, the dye other than the photochromic compound and the reverse photochromic compound contained in the colored layer will also be simply referred to as the dye.
Here, the photochromic layer or the reverse photochromic layer may contain the above-mentioned dye.

In the ophthalmic transmissive optical article set (ophthalmic lens set) of the present disclosure, for example, the following configuration can satisfy the above requirements 1 and 2. In the following examples, the spectacle lens that essentially includes a photochromic layer or a reverse photochromic layer is referred to as the first lens, and the other spectacle lens is referred to as the second lens. In the following examples, the first dye and the second dye correspond to the above-mentioned dyes.
Configuration 1: The first lens includes a photochromic layer and a layer containing a first dye, and the second lens includes a layer containing a second dye. The second lens may include a photochromic layer or a reverse photochromic layer.
Configuration 2: A first lens includes a photochromic layer and a second lens includes a layer containing a second dye.
Configuration 3: The first lens includes a reverse photochromic layer, and the second lens does not include a pigment. Note that the second lens may include a reverse photochromic layer that exhibits a different color from the first lens.
Configuration 4: The first lens includes a reverse photochromic layer and a layer including a first dye, and the second lens includes a layer including the first dye. The second lens may include a reverse photochromic layer that exhibits a different color from the first lens.
According to the configuration exemplified above, it is possible for a color difference to occur in the state of requirement 1, and for the color difference to be suppressed in the state of requirement 2.
As long as the above-mentioned requirements 1 and 2 are satisfied, the present disclosure is not limited to the above configuration and can be modified as appropriate.

The coloring of the lens may be uniform or distributed over the entire lens. For example, by darkening the color of the center of the lens where the user's gaze is likely to be focused, it is possible to maintain a sufficient color difference between the two eyeglass lenses, while lightening the color of the outer periphery of the lens where the user's gaze is less likely to be focused, thereby weakening the color impression when viewed by people other than the user. Here, the center of the lens where the user's gaze is likely to be focused is determined by the user of the eyeglass lens and the shape of the eyeglass frame, and is selected from the geometric center or optical center as appropriate.
Specifically, in the present disclosure, the above-mentioned method for measuring color difference is performed with respect to the geometric center of a circular lens (spectacles lens before beading) with a diameter of 75 mm. In this case, the geometric center and the optical center are the same. However, after the lens is beaded and mounted in the spectacle frame, the geometric center and the optical center are different, so it is preferable to measure the color difference at the optical center.

The two spectacle lenses may be spectacle lenses for vision correction with a predetermined power, spectacle lenses with no power, lenses for safety glasses, progressive lenses with a variable power within a single lens, or lenses for magnifying glasses (magnifying glasses).
The two spectacle lenses may also be spectacle lenses for sunglasses that reduce a portion of ultraviolet and/or visible light.
Alternatively, the ophthalmic transmission type optical article set (ophthalmic lens set) may be an ophthalmic lens set that can be attached to spectacles and is separate from spectacles. A lens set separate from spectacles is also called a clip-on.

The eyeglass lenses contained in the ophthalmic transmissive optical item set (ophthalmic lens set) are described in detail below.

The lens substrate to be the spectacle lens may be plastic or glass. To color the plastic substrate with a dye, a colorant may be mixed into the plastic substrate when the plastic substrate is cured, or at least one surface of the cured plastic substrate may be dyed with a predetermined dyeing solution. A plastic substrate dyed with a dyeing solution is preferred because the color is uniform regardless of the thickness of the substrate. In addition, the entire lens can be colored by providing a film containing a colorant on an uncolored plastic lens (clear lens) or by providing an interference film to transmit only a specific wavelength.
Similarly, for glass substrates, the eyeglass lens itself, including the functional film, can be colored by mixing a colorant into the glass itself, by providing a film containing a colorant on an uncolored glass lens (clear lens), or by providing an interference film that transmits only specific wavelengths.
When coloring, the type and amount of the dye used are adjusted so as to satisfy the above requirements 1 and 2.

The lens substrate may correspond to a photochromic layer containing a photochromic compound, or a reverse photochromic layer containing a reverse photochromic compound. It is preferable to have a photochromic layer or reverse photochromic layer separate from the lens substrate, in that color changes due to changes in brightness are more likely to occur and the time required for the color change is shorter.

Examples of resins contained in the plastic substrate that is the lens substrate include acrylic resin, thiourethane resin, methacrylic resin, allyl resin, episulfide resin, polycarbonate resin, polyurethane resin, polyester resin, polystyrene resin, polyethersulfone resin, polymethylpentene resin, diethylene glycol bisallyl carbonate resin, polyvinyl chloride resin, and sulfur-containing copolymers.
In this embodiment, the refractive index of the plastic substrate at a wavelength of 546.1 nm is preferably in the range of 1.50 to 1.74, for example.

In the present disclosure, the dyeing solution used for dyeing the plastic substrate preferably contains a dye, a surfactant, and a solvent (e.g., water). In addition, one dyeing solution may be a dyeing solution containing one type of dye, i.e., a dye of one color, or may be a mixed dyeing solution containing two or more types of dyes, i.e., dyes of two or more colors.
That is, in dyeing a plastic substrate, a plurality of dye solutions each having a different color may be used, or a mixed dye solution in which dyes of two or more colors are mixed may be used.
The mixed dye solution may be prepared by mixing a plurality of dye solutions of different colors, or may be prepared by mixing a plurality of dyes in advance and using the mixed dye.

The dye may be any dye as long as it falls within the limited range of luminous transmittance and the range of requirements 1 and 2 regarding the color difference between the two spectacle lenses of the present disclosure.
Examples of the dye include disperse dyes, reactive dyes, direct dyes, composite dyes, acid dyes, metal complex dyes, vat dyes, sulfur dyes, fluorescent dyes, phosphorescent dyes, dyes for resin coloring, and other functional dyes.
Examples of the dye include a yellow (Y) dye, a red (R) dye, a blue (B) dye, a brown dye, a violet dye, an orange dye, and a black dye.
From the viewpoint of reducing color changes in eyeglass lenses due to light sources, it is preferable to use two or more types of dyes in combination rather than using only one type.
When the lens substrate is a photochromic layer or a reverse photochromic layer, the dye may contain a photochromic compound or a reverse photochromic compound, which will be described in detail later.

Examples of yellow dyes include Kayaron Polyester Yellow AL, Kayalon Microester Yellow AQ-LE, Kayalon Microester Yellow C-LS, Kayaron Microester Yellow 5L-E, Kayaron Polyester Yellow 5R-SE(N)200, Kayaron Polyester Yellow BRL-S 200 (manufactured by Nippon Kayaku Co., Ltd.), Kiwalon polyester Yellow ESP eco, Kiwalon polyester Yellow KN-SE 200 (manufactured by Kiwa Chemical Industry Co., Ltd.), FSP-Yellow P-E (manufactured by Futaba Sangyo Co., Ltd.), and Dianix Yellow (manufactured by Dystar Japan Co., Ltd.).

Examples of red dyes include Kayalon Polyester Red (Kayalon Microester Red) AUL-S, Kayalon Microester Red 5L-E, Kayalon Microester Red C-LS conc, Kayalon Microester Red DX-LS, Kayalon polyester Red AN-SE, Kayalon Polyester Red B-LE, Kayaron Polyester Rubine GL-SE 200 (manufactured by Nippon Kayaku Co., Ltd.), Kiwalon polyester Red ESP, Kiwalon polyester Red KN-SE (manufactured by Kiwa Chemical Industry Co., Ltd.), FSP-Red BL (manufactured by Futaba Sangyo Co., Ltd.), and Dianix Red (manufactured by Dystar Japan Co., Ltd.).

Examples of blue dyes include Kayalon Polyester Blue AUL-S dye (manufactured by Nippon Kayaku Co., Ltd.), Dianix Blue AC-E (manufactured by Dystar Japan Co., Ltd.), Kiwalon Polyester Blue ESP, Kiwalon Polyester Blue KN-SE (manufactured by Kiwa Chemical Co., Ltd.), Kayalon Microester Blue AQ-LE, Kayaron Microester Blue 5L-E, Kayalon Microester Blue C-LS conc, Kayalon Microester Blue DX-LS conc, Kayalon Polyester Blue AN-SE, Kayaron Polyester Blue AUL-S(N) (manufactured by Nippon Kayaku Co., Ltd.), and FSP-Blue AUL-S (manufactured by Futaba Sangyo Co., Ltd.).

The surfactant is not particularly limited as long as it can uniformly disperse the dye in a solvent such as water.
Examples of the surfactant include ionic surfactants (such as anionic surfactants and cationic surfactants) and nonionic surfactants.

Examples of the solvent include water and organic solvents.
Examples of the organic solvent include alcohol-based solvents, ketone-based solvents, ether-based solvents, ester-based solvents, hydrocarbon-based solvents, halogenated hydrocarbon-based solvents, amide-based solvents, sulfone-based solvents, and sulfoxide-based solvents.

The dyeing solution may contain various additives such as pH adjusters, viscosity adjusters, leveling agents, matting agents, stabilizers, UV absorbers, and antioxidants, as necessary.

The content of the dye in the dye solution is preferably from 0.001 to 10% by mass, and more preferably from 0.01 to 5% by mass, based on the total mass of the dye solution.
The content of the surfactant in the dye solution is preferably from 0.01 to 10% by mass, more preferably from 0.05 to 5% by mass, based on the total mass of the dye solution.

As a method for dyeing at least one surface of a plastic substrate to obtain a colored lens, for example, the following three methods can be mentioned.
(1) A method of coating the surface of a plastic substrate with a dye solution and heating the surface to dye the plastic substrate (coating method)
(2) A method of dyeing the surface of a plastic substrate by immersing the plastic substrate in a heated dye solution (dip method)
(3) A method in which a sublimation dye is coated on a transfer medium, a plastic substrate is placed near the transfer medium, and heated to dye the surface of the plastic substrate (sublimation dyeing method).
Of these three methods, the coating method (1) is preferred in that it requires less dye solution and reduces production costs. On the other hand, the dip method (2) is preferred in that it is easy to apply uniformly, and the sublimation dyeing method (3) is preferred in that it is easy to pattern, so the method may be selected according to the application. These methods may be used alone or in combination.

In the above-mentioned coating method, examples of the method for applying the dye liquid to the plastic substrate include ordinary coating methods such as brush coating, dipping, spin coating, roll coating, spray coating, flow coating, and inkjet type coating.
With regard to coating, the plastic substrate may be coated on one side or, to further increase the color density, on both sides.
The coating thickness of the dye solution on the plastic substrate can be appropriately adjusted and can be, for example, in the range of 0.01 to 10 μm.

In dyeing by the coating method, when dyeing (coloring processing) a plastic substrate, it is preferable to coat the surface of the plastic substrate with a dyeing liquid and then perform a heat treatment, thereby allowing the dye in the dyeing liquid to penetrate and diffuse into the surface of the plastic substrate.
The heating conditions for the plastic substrate coated with the dye solution are preferably a heating temperature of 70 to 180° C. and a heating time of 10 to 180 minutes. In addition to air oven heating, examples of the heating method include far-infrared radiation heating and UV radiation heating.
In dyeing by the coating method, when dyeing (coloring) a plastic substrate with a gradual concentration gradient, the dye solution is coated on the lens, and then the coating solution surface (dye solution surface) is heated while the heating area is gradually changed, whereby an amount of dye corresponding to the concentration gradient can be penetrated into the plastic substrate.

The dye solution may be coated on a plastic substrate, the plastic substrate coated with the dye solution may be heat-treated, and then the plastic substrate may be washed.
The method for cleaning the plastic substrate is not particularly limited as long as it can remove the coating layer (applied dye solution) on the surface of the plastic substrate, but wiping with an organic solvent or cleaning with an alkaline cleaner is preferred.

When dyeing a plastic substrate by the above-mentioned dipping method, the plastic substrate is immersed in a dyeing solution, so that the dye in the dyeing solution can permeate and diffuse from the surface of the plastic substrate.
In dyeing by the dip method, it is preferable to immerse the plastic substrate in a dye solution heated to 80 to 95°C.
After the immersion, the plastic substrate may be washed, for example by wiping with a solvent.

The spectacle lens may include a functional film. The functional film is a film disposed on a lens substrate such as the above-mentioned plastic substrate, and examples of the functional film include a polarizing film, a primer film, a hard coat film, an interference film such as an anti-reflection film, and a water-repellent/oil-repellent film. In addition, when the spectacle lens is a spectacle lens including a photochromic layer or a reverse photochromic layer, and the lens substrate does not correspond to the photochromic layer or the reverse photochromic layer, the spectacle lens includes the photochromic layer or the reverse photochromic layer as the functional film.
The photochromic layer or the reverse photochromic layer may be integrated with the function of any of the above-mentioned functional films.
Here, when the spectacle lens has a functional film disposed on the lens substrate as described above, the entire spectacle lens including the functional film satisfies the above-mentioned relationship between luminous transmittance and color difference.

The primer film is a layer used to improve adhesion between the members disposed on either side of the film.
The material constituting the primer film is not particularly limited, and known materials can be used, for example, resins are mainly used. The type of resin used is not particularly limited, and examples thereof include acrylic resins, polyurethane resins, epoxy resins, phenolic resins, polyimide resins, polyester resins, bismaleimide resins, and polyolefin resins, and polyurethane resins are preferred.
The method for forming the primer film is not particularly limited, and any known method can be used. For example, a method can be used in which a primer film-forming composition containing a specific resin is applied onto a spectacle lens, and a curing treatment is performed as necessary to form a primer film.
The primer film contains a photochromic compound or a reverse photochromic compound, and may correspond to a photochromic layer or a reverse photochromic layer.

The hard coat film is a layer that imparts scratch resistance to the eyeglass lens.
The hard coat film preferably has a pencil hardness of "H" or higher according to the test method specified in JIS K5600.

As the hard coat film, a known hard coat film can be used, for example, an organic hard coat film, an inorganic hard coat film, and an organic-inorganic hybrid hard coat film can be mentioned. For example, in the field of eyeglass lenses, an organic-inorganic hybrid hard coat film is generally used.
The method for forming the hard coat film is not particularly limited, and examples of the method include a method in which a composition for forming a hard coat film is applied onto a spectacle lens to form a coating film, and then the coating film is subjected to a curing treatment such as a light irradiation treatment.
The hard coat film contains a photochromic compound or a reverse photochromic compound, and may correspond to a photochromic layer or a reverse photochromic layer.

The structure of the anti-reflection film is not particularly limited, and may be a single-layer structure or a multi-layer structure.
The anti-reflection film is preferably an inorganic anti-reflection film, which is an anti-reflection film made of an inorganic compound.
In the case of a multi-layer structure, a structure in which low refractive index layers and high refractive index layers are alternately laminated is preferred. Examples of materials constituting the high refractive index layers include oxides of titanium, zirconium, aluminum, niobium, tantalum, or lanthanum. Examples of materials constituting the low refractive index layers include oxides of silica.
The method for producing the anti-reflective coating is not particularly limited, but examples thereof include dry methods such as vacuum deposition, sputtering, ion plating, ion beam assisted deposition, and chemical vapor deposition (CVD).

The photochromic layer contains a photochromic compound. The photochromic compound is preferably a compound that is colored by irradiation with light and, after being colored, fades in an environment where it is not irradiated with light.
As the photochromic compound, a conventionally known compound can be used, and examples thereof include compounds that generate dipolar ions upon irradiation with light (e.g., spirobenzopyran-based compounds), compounds that undergo trans-cis isomerization upon irradiation with light (e.g., azobenzene-based compounds), compounds that undergo electrocyclic reactions upon irradiation with light (e.g., diarylethene-based compounds and fulgide-based compounds), compounds that change the bonding position of hydrogen atoms upon irradiation with light (e.g., salicylideneaniline-based compounds), and compounds that undergo ion dissociation upon irradiation with light (e.g., triphenylmethane leucocyanide-based compounds).
Among these, naphthopyran-based compounds are preferred from the viewpoints of the designability of color tone and durability.
The photochromic layer may be formed by adding a photochromic compound to a dyeing solution for the lens substrate to dye the lens substrate, or by adding a photochromic compound to the composition for forming the functional film, and forming the functional film into the photochromic layer.
Alternatively, a photochromic layer may be formed by preparing a composition for forming a photochromic layer containing a photochromic compound, a predetermined resin, etc., and a solvent, applying the composition for forming a photochromic layer onto the lens substrate or the functional film, and carrying out a curing treatment, etc. Examples of the predetermined resin, etc. include resins used in primer films.

The reverse photochromic layer contains a reverse photochromic compound. The reverse photochromic compound is preferably a compound that fades when irradiated with light and, after fading, remains colored in an environment without light irradiation.
As the reverse photochromic compound, a conventionally known compound can be used, and examples thereof include indolinospirobenzopyran-based compounds, bridged imidazole dimer-based compounds, and donor-acceptor Stenhouse adducts.
The reverse photochromic layer can be formed, for example, by the same method as that for forming the photochromic layer.

In the above example, the ophthalmic lenses of the ophthalmic lens set are a spectacle lens for the right eye and a spectacle lens for the left eye, but the present invention is not limited to this and the ophthalmic lenses may be contact lenses. That is, the ophthalmic lens set may have a contact lens for the right eye and a contact lens for the left eye, and the color difference between the contact lens for the right eye and the contact lens for the left eye in the L ^* a ^* b ^* display may be more than 0.23 and less than 33.8.
When the color difference between the right eye contact lens and the left eye contact lens satisfies the above range, the effect of improving visual contrast can be obtained. In addition, the two contact lenses may be contact lenses for vision correction with a predetermined power, or may be contact lenses with no power.

<Transmissive optical article for eyes>
An example of the ophthalmic transmission type optical article is an ophthalmic transmission type optical article 52 used in goggles 50 shown in FIG.
In FIG. 2, the goggles 50 include an ophthalmic transmission type optical article 52, a frame 56 to which the ophthalmic transmission type optical article 52 is attached, and a band 58 for attaching the goggles 50 to the head of a user. Yes.
The frame 56 and band 58 are similar to frames and bands used in conventional goggles.

The ocular transmissive optical article 52 has two regions, a first region and a second region, that is, a right-eye region 53 and a left-eye region 54. At least one of the right-eye region 53 (first region) and the left-eye region 54 (second region) contains a photochromic compound or a reverse photochromic compound. In the example shown in FIG. 2, when viewed from the user, the region to the right of the center of the ocular transmissive optical article 52 is the right-eye region 53, and the region to the left of the center is the left-eye region 54.
The ocular transmissive optical article 52 satisfies the following requirements 3 and 4 with respect to the color difference in L ^* a ^* b ^* display between the right eye region 53 (first region) and the left eye region 54 (second region).
Requirement 3: When the photochromic compound is contained in at least one of the first region and the second region, in a faded state of the photochromic compound,
In the case where the reverse photochromic compound is contained in at least one of the first region and the second region, in a state where the reverse photochromic compound is colored,
When a CIE standard illuminant D65 with a 2-degree visual field is used as a reference light, a color difference ΔE00 between the first region and the second region calculated based on CIEDE2000 is greater than 0.23 and less than 33.8.
Requirement 4: When the photochromic compound is contained in at least one of the first region and the second region, in a state in which the photochromic compound is colored,
In the case where the reverse photochromic compound is disposed in at least one of the first region and the second region, in a state where the reverse photochromic compound is faded,
When a CIE standard light source D65 with a 2-degree visual field is used as a reference light, the color difference ΔE00 between the first area and the second area calculated based on CIEDE2000 is 7.4 or less.
When the color difference between the right eye region 53 and the left eye region 54 satisfies requirement 3, the visual contrast can be improved. Furthermore, when the color difference satisfies requirement 4, the discomfort in appearance when worn can be reduced.
The preferred ranges of visual transmittance and color difference of the right eye region 53 and the left eye region 54 are the same as the preferred ranges of color difference of the right eye spectacle lens 11 and the left eye spectacle lens 12 of the above-mentioned ophthalmic transmission type optical article set (ophthalmic lens set) 10.

In the example shown in FIG. 2, the ocular transmissive optical article 52 is configured to have a right eye region 53 and a left eye region 54, but this is not limited thereto, and at least a portion of the ocular transmissive optical article 52 including a region corresponding to the visual field of the user's right eye may be the right eye region 53, and at least a portion of the ocular transmissive optical article 52 including a region corresponding to the visual field of the user's left eye may be the left eye region 54. In other words, the ocular transmissive optical article 52 may have regions other than the right eye region 53 and the left eye region 54.

The ocular transmission type optical article 52 is formed by forming a photochromic layer or a reverse photochromic layer in at least one of the regions to become the right eye region 53 and the left eye region 54 of a plastic substrate.
In the ocular transmissive optical article 52, for example, the following configuration can satisfy the above requirements 3 and 4. In the following examples, the region that essentially has a photochromic layer or a reverse photochromic layer is described as the right eye region, and the other region is described as the left eye region. In the following examples, the first dye and the second dye correspond to the above-mentioned dyes.
Configuration 5: the right eye region includes a photochromic compound and a first dye, and the left eye region includes a second dye. The left eye region may include a photochromic compound or an inverse photochromic compound.
Configuration 6: The right eye area contains a photochromic compound and the left eye area contains a second dye.
Configuration 7: The right eye region contains a reverse photochromic compound, and the left eye region does not contain a pigment. Note that the left eye region may contain a reverse photochromic compound that exhibits a different color than the right eye region.
Configuration 8: The right eye region includes a reverse photochromic compound and a first dye, and the left eye region includes the first dye. The left eye region may include a reverse photochromic compound that exhibits a different color from that of the right eye region.
According to the configuration exemplified above, it is possible for a color difference to occur in the state of requirement 3, and for the color difference to be suppressed in the state of requirement 4.
As long as the above requirements 3 and 4 are satisfied, the present disclosure is not limited to the above configuration and may be modified as appropriate.

As the material of the plastic substrate of the ophthalmic transmission type optical article 52, the same material as the lens substrate explained in the above-mentioned ophthalmic transmission type optical article set (ophthalmic lens set) 10 can be used.
The same methods as those for the above-mentioned ophthalmic transmissive optical article set (ophthalmic lens set) can be used as a method for coloring the plastic substrate of the ophthalmic transmissive optical article 52 and a method for forming the photochromic layer and the reverse photochromic layer. In addition, as a dyeing liquid used for dyeing when coloring by dyeing, a liquid similar to the dyeing liquid described for the above-mentioned ophthalmic transmissive optical article set (ophthalmic lens set) 10 can be used.

A method for dyeing the surface of a plastic substrate to obtain an ocular transmissive optical article 52 having a right eye region 53 and a left eye region 54 can be, for example, by masking a portion that will become one of the regions and dyeing the portion that will become the other region in a desired color using a coating method, a dip method, a sublimation dyeing method, or the like similar to the dyeing method described above, and then masking the other dyed region and dyeing the portion that will become one of the regions in another desired color using a similar method.
Moreover, the photochromic layer and the reverse photochromic layer can be formed by the same method as that for the above-mentioned eyeglass lenses.

The ocular transmissive optical article set of the present disclosure will be explained in more detail below with reference to examples and comparative examples, but the present embodiment is not limited in any way by these examples.

<Lens manufacturing>
(Preparation of staining solution)
First, a dye solution was prepared using a dye, a surfactant, and pure water.
Pure water (1000 parts by mass) was placed in a container, and FSP YELLOW FL dye (manufactured by Futaba Sangyo Co., Ltd.) (2.0 parts by mass) and Nikka Sunsalt #7000 (trade name, manufactured by Nicca Chemical Co., Ltd.) (1.0 part by mass) were added as yellow dyes to obtain dyeing solution 1. Pure water (1000 parts by mass) was placed in a container, and FSP BLUE AULS dye (manufactured by Futaba Sangyo Co., Ltd.) (2.0 parts by mass) and Nikka Sunsalt #7000 (1.0 part by mass) were added as blue dyes to obtain dyeing solution 2. Pure water (1000 parts by mass) was placed in a container, and FSP RED BL dye (manufactured by Futaba Sangyo Co., Ltd.) (2.0 parts by mass) and Nikka Sunsalt #7000 (1.0 part by mass) were added as red dyes to obtain dyeing solution 3.

(Dyeing of Plastic Lenses and Preparation of Colored Lens 1)
Next, the three prepared dye solutions 1, 2, and 3 were each heated to 90°C, and a plastic lens with a refractive index of 1.60 (Nikon Lite 3AS, manufactured by Nikon Essilor, size 75φ, center thickness 2 mm) was immersed in each of the dye solutions 1, 2, and 3 to produce a light reddish purple lens.
Next, on the surface of the obtained colored lens, a urethane-based primer film (coating film for improving impact resistance) having a thickness of approximately 1 μm, a silicone-based hard coating film for improving scratch resistance having a thickness of approximately 2 μm, a multilayer anti-reflection coating film formed of inorganic oxides having a thickness of approximately 0.3 μm by a vacuum deposition method, and a fluorine-based water- and oil-repellent film were disposed in this order to obtain the desired colored lens 1.

(Dyeing of plastic lenses and preparation of colored lenses 2 to 5)
A plastic lens (Nikon Lite 3AS) with a refractive index of 1.60 was immersed in the above two dye solutions 2 and 3, and except for changing the immersion time, a pale blue-purple lens was produced in the same manner as for colored lens 1. A urethane-based primer film, a silicone-based hard coat film for improving scratch resistance, a multilayer anti-reflection coat film, and a water- and oil-repellent film were arranged in this order on the surface of the obtained colored lens, in the same manner as for colored lens 1, to obtain the target colored lenses 2 to 5.

(Dyeing of plastic lenses and preparation of colored lenses 6 to 30)
A plastic lens (Nikon Lite 3AS) with a refractive index of 1.60 was immersed in one or more of the three dyeing solutions 1, 2, and 3 that were the same as those used for dyed lens 1, and lenses of various color tones were produced in the same manner as for dyed lens 1, except that the immersion time was changed. A urethane-based primer film, a silicone-based hard coat film for improving scratch resistance, a multilayer anti-reflection coat film, and a water- and oil-repellent film were disposed in this order on the surface of the obtained dyed lens, in the same manner as for dyed lens 1, to obtain the target dyed lenses 6 to 30.

(Preparation of Colored Lenses 31 and 32)
Transitions Signature GEN8 gray and brown photochromic lenses including a photochromic layer were excited by an ultraviolet LED lamp provided by Transitions for coloring demonstrations, and the lenses excited at 23°C until the coloring was saturated were used as colored lenses 31 and 32, respectively.

(Preparation of Untinted Lenses 1 and 2)
On the surface of a plastic lens (Nikon Lite 3AS) having a refractive index of 1.60, a urethane-based primer film, a silicone-based hard coat film for improving scratch resistance, a multilayer anti-reflection coat film, and a water- and oil-repellent film were disposed in this order, similarly to the colored lens 1, to obtain the target uncolored lenses 1 and 2.

(Preparation of Untinted Lenses 3 and 4)
The gray and brown Signature GEN8 lenses manufactured by Transitions, which are photochromic lenses including a photochromic layer, were placed in paper bags to block the excitation light, and the lenses were de-excited at 23°C until the fading was saturated. These lenses were designated as uncolored lens 3 and uncolored lens 4, respectively.
When the uncolored lenses 3 and 4 are excited by the ultraviolet LED lamp in the above-mentioned procedure, they become colored lenses 31 and 32, respectively.

Below, we will explain experimental examples that demonstrate the effects associated with the numerical range of ΔE00 using the lenses produced above, as well as comparative experimental examples. After that, we will explain examples in which a set of ophthalmic transmissive optical articles (ophthalmic lens sets) according to the present disclosure was produced.

<Demonstration of the effect associated with the numerical range of ΔE00>
(Lens evaluation)
The L ^* a ^* b ^* coordinates of the prepared colored lenses 1 to 30 and uncolored lenses 1 and 2 were measured by the method described above using a U-4100 spectrophotometer manufactured by Hitachi High-Technologies Corp. In order to prevent changes in the lens color during measurement, colored lenses 31 to 32 and uncolored lenses 3 and 4 were simultaneously measured over a wavelength range of 380 to 780 nm using a DOT-41 manufactured by Murakami Color Research Laboratory, and the L ^* a ^* b ^* coordinates were calculated.
The reference light used in each of the above measurements was a D65 light source (field of view: 2 degrees).

The luminous transmittance Y, L ^* a ^* b ^* coordinates, and the color tone of the lens when observed under a white LED lamp are shown in Table 1. The uncolored lens was recognized as light gray due to the color of the plastic material itself, the ultraviolet absorbing agent and bluing agent added to the lens, and the transmitted light characteristics of the multilayer anti-reflection coating film.

(Improvement of visual contrast)
[Experimental Examples 1 to 10, Comparative Experimental Examples 1 to 3]
The right-eye lens and the left-eye lens were combined in the combinations shown in Table 2 below to form ophthalmic lens sets for experimental examples and comparative experimental examples. The color difference ΔE00 and the absolute value ΔY of the difference in luminous transmittance for each lens set are also shown.

[evaluation]
A black Landolt ring was displayed on a white background of a liquid crystal display (CS Pola 600 manufactured by Essilor Instruments) for visual acuity measurement. The brightness of the liquid crystal display was measured with a spectroluminometer SR-3AR manufactured by Topcon House and was 202 cd/ ^m2 . The room was illuminated downward by a white LED lamp installed on the ceiling, and the illuminance was 300 lux when measured upward at the location where the liquid crystal display was installed.
The subjects were required to correct their vision with eyeglass lenses or contact lenses, and were set so that the Landolt ring with a luminance contrast setting of 100% was clearly visible when they observed the liquid crystal display from a position 2.5 meters away. The actual measured value of the luminance contrast was 99%.
Next, the brightness contrast of the Landolt ring was set to 10%, and the Landolt ring was reduced to a size where the direction of the slit of the Landolt ring could be barely discerned. The actual brightness contrast was 13%. When each ophthalmic lens set was worn by a subject, it was confirmed whether the visual contrast was improved and the slit of the Landolt ring was more clearly visible.

When each ophthalmic lens set was worn by a subject, it was evaluated whether the visual contrast was improved and the Landolt ring was more clearly visible. In order to eliminate the influence of the shape of the eyeglass lens and the frame, the evaluation was performed by determining whether the Landolt ring was more clearly visible than that of Comparative Example 1 based on the color difference between the two eyeglass lenses, using the non-colored lens pair shown in Comparative Example 1 as a standard.
In addition, it was determined whether the color difference (binocular rivalry) and the difference in visual transmittance between the two spectacle lenses could be worn without being bothersome.
Such an evaluation was carried out on five subjects, and the evaluation was based on the number of subjects who felt an effect. The results are shown in Table 3.

Compared to Comparative Experimental Example 1 in which ΔE00 was 0.13, in Experimental Example 1 in which ΔE00 was 0.40, 4 out of 5 people felt a visual contrast improvement effect. In addition, the difference in color and luminous transmittance between the two eyeglass lenses was not noticeable when wearing them, and 5 out of 5 people judged them to be wearable. In Experimental Examples 2 to 10, the visual contrast improvement effect was felt more strongly as ΔE00 became larger, and 5 out of 5 people felt a visual contrast improvement effect.
In Experiments 4 to 8, the lens color of the right eye was fixed and the lens color of the left eye was varied. The preferred color combinations differed depending on the subject's preferences, but the visual contrast improvement effect was obtained with every color combination.
In Comparative Experimental Example 2, in which ΔE00 was 0.23, no visual contrast improvement effect was confirmed compared to Comparative Experimental Example 1. In Comparative Experimental Example 3, while a visual contrast improvement effect was confirmed, the color difference ΔE00 between the two spectacle lenses was as large as 33.78, causing discomfort due to binocular rivalry, and five out of five people judged that they could not wear the glasses.

(Appearance is strange when worn)
[Experimental Examples 11 to 12, Comparative Experimental Examples 4 to 7]
An ophthalmic lens set of an experimental example was prepared by combining a right-eye lens and a left-eye lens in the combination shown in Table 4 below. The color difference ΔE00 and the absolute value ΔY of the difference in luminous transmittance of each lens set are also shown.

[evaluation]
A person wearing a eyeglass frame containing each lens set was observed from a distance of about 1 m under a white LED light, and the color difference between the two eyeglass lenses was judged as being either not noticeable, slightly uncomfortable but not enough to be discussed, or strongly uncomfortable and pointed out. This evaluation was carried out on five subjects, and the evaluation was made by number of people. The results are shown in Table 5.

In Experimental Examples 11 and 12, where ΔE00 was 1.64 and 5.04, more than half of the subjects judged it to be unnoticeable. On the other hand, in Comparative Experimental Example 4, where ΔE00 was 7.41, more than half of the subjects felt uncomfortable, and the number of subjects who felt uncomfortable increased in Comparative Experimental Examples 5 to 7, where ΔE00 was larger. From these results, it was found that if ΔE00 is 7.4 or less, the discomfort in appearance can be suppressed.

<Set of ophthalmic transmission optical article of the present disclosure>
(Change in color difference in laminated lenses)
The photochromic lenses and the colored lenses were combined in the combinations shown in Table 6 below, and the transmission spectrum of the lens laminate was calculated from the product of the transmission spectra of each lens. The luminous transmittance Y and L ^* a ^* b ^* coordinates were also determined by the method described above.
Furthermore, ΔE00 when each lens laminate was combined in the combination shown in Table 7 below was determined by the method described above.

As is clear from the results in Table 7, in the lens combinations shown in Examples 1 to 6, when the photochromic layer is in an excited state (colored state), ΔE00 is 7.4 or less, and therefore, based on the results in Table 5 above in <Demonstration of the effect associated with the numerical range of ΔE00>, there is no problem with discomfort in appearance.
Furthermore, when the photochromic layer is in a de-excited state (faded state), ΔE00 is 17.76 to 23.14, and a high visual contrast improvement effect is obtained from the results in Table 3 of the above <Demonstration of effects associated with the numerical range of ΔE00>. Furthermore, since the above visual contrast improvement effect is obtained when the photochromic layer is in a de-excited state (faded state), i.e., in a dark environment, a higher visual contrast improvement effect is obtained in a dim environment.
Furthermore, by using a reverse photochromic lens having a reverse photochromic layer instead of a photochromic lens and adjusting the color difference ΔE00 to be greater than 0.23 and less than 33.8 in the excited state (faded state) of the reverse photochromic lens, and combining it with another lens so that the color difference ΔE00 is 7.4 or less in the de-excited state (colored state) of the reverse photochromic lens, the same effect as when a photochromic layer is used can be obtained.

1 Glasses 10 Eye transmission optical article set (eye lens set)
11 Right eye spectacle lens 12 Left eye spectacle lens 14 Spectacle frame 50 Goggles 52 Ophthalmic transmission type optical article 53 Right eye region (first region)
54 Left eye area (second area)
56 Frame 58 Band

Claims (5)

A set of ophthalmic transmission type optical articles consisting of two ophthalmic transmission type optical articles,
At least one of the two ocular transmission optical articles has a photochromic layer containing a photochromic compound or a reverse photochromic layer containing a reverse photochromic compound;
A set of ocular transmission optical articles satisfying the following requirements 1 and 2.
Requirement 1: When at least one of the two ocular transmission optical articles has the photochromic layer, in a state in which the photochromic layer is faded,
In the case where at least one of the two ocular transmission optical articles has the reverse photochromic layer, in a state where the reverse photochromic layer is colored,
When CIE standard illuminant D65 with a 2-degree visual field is used as a reference light, the color difference ΔE00 between the two ophthalmic transmission optical articles calculated based on CIEDE2000 is more than 0.23 and less than 33.8.
Requirement 2: When at least one of the two ocular transmission optical articles has the photochromic layer, in a state in which the photochromic layer is colored,
In the case where at least one of the two ocular transmission optical articles has the reverse photochromic layer, in a state where the reverse photochromic layer is faded,
When CIE standard illuminant D65 with a 2-degree visual field is used as a reference light, the color difference ΔE00 between the two ophthalmic transmission optical articles calculated based on CIEDE2000 is 7.4 or less. An ophthalmic lens set consisting of two ophthalmic lenses,
At least one of the two ophthalmic lenses has a photochromic layer containing a photochromic compound or a reverse photochromic layer containing a reverse photochromic compound;
An ophthalmic lens set that satisfies the following requirements 1 and 2.
Requirement 1: When at least one of the two ophthalmic lenses has the photochromic layer, in a state in which the photochromic layer is faded,
In the case where at least one of the two ophthalmic lenses has the reverse photochromic layer, in a state where the reverse photochromic layer is colored,
When CIE standard illuminant D65 with a 2-degree visual field is used as a reference light, the color difference ΔE00 between the two ophthalmic lenses calculated based on CIEDE2000 is more than 0.23 and less than 33.8.
Requirement 2: When at least one of the two ophthalmic lenses has the photochromic layer, in a state in which the photochromic layer is colored,
In the case where at least one of the two ophthalmic lenses has the reverse photochromic layer, in a state where the reverse photochromic layer is faded,
When CIE standard light source D65 with a 2-degree visual field is used as a reference light, the color difference ΔE00 between the two ophthalmic lenses calculated based on CIEDE2000 is 7.4 or less. The ophthalmic lens set according to claim 2, wherein the ophthalmic lens is a spectacle lens or a contact lens. An ophthalmic transmission optical article having a first region and a second region,
At least one of the first region and the second region contains a photochromic compound or a reverse photochromic compound;
An ocular transmission optical article satisfying the following requirements 3 and 4.
Requirement 3: When the photochromic compound is contained in at least one of the first region and the second region, in a faded state of the photochromic compound,
In the case where the reverse photochromic compound is contained in at least one of the first region and the second region, in a state where the reverse photochromic compound is colored,
When a CIE standard illuminant D65 with a 2-degree visual field is used as a reference light, a color difference ΔE00 between the first region and the second region calculated based on CIE DE2000 is greater than 0.23 and less than 33.8.
Requirement 4: When the photochromic compound is contained in at least one of the first region and the second region, in a state in which the photochromic compound is colored,
In the case where the reverse photochromic compound is contained in at least one of the first region and the second region, in a state where the reverse photochromic compound is faded,
When a CIE standard light source D65 with a 2-degree visual field is used as a reference light, a color difference ΔE00 between the first region and the second region calculated based on CIE DE2000 is 7.4 or less. Glasses,
A left eye spectacle lens and a right eye spectacle lens are included,
At least one of the spectacle lens for the left eye and the spectacle lens for the right eye has a photochromic layer containing a photochromic compound or a reverse photochromic layer containing a reverse photochromic compound,
Glasses that meet requirements 1 and 2 below.
Requirement 1: When at least one of the spectacle lens for the left eye and the spectacle lens for the right eye has the photochromic layer, in a state in which the photochromic layer is faded,
In the case where at least one of the spectacle lens for the left eye and the spectacle lens for the right eye has the reverse photochromic layer, in a state where the reverse photochromic layer is colored,
When a CIE standard illuminant D65 with a 2-degree visual field is used as a reference light, the color difference ΔE00 between the left eye spectacle lens and the right eye spectacle lens calculated based on CIE DE2000 is more than 0.23 and less than 33.8.
Requirement 2: When at least one of the spectacle lens for the left eye and the spectacle lens for the right eye has the photochromic layer, in a state in which the photochromic layer is colored,
In the case where at least one of the spectacle lens for the left eye and the spectacle lens for the right eye has the reverse photochromic layer, in a state where the reverse photochromic layer is faded,
When a CIE standard light source D65 with a 2-degree visual field is used as a reference light, a color difference ΔE00 between the left eye spectacle lens and the right eye spectacle lens calculated based on CIEDE2000 is 7.4 or less.

Images