JP2014038247A - Ophthalmic lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmic lens that enables improvement of further convenience.SOLUTION: The ophthalmic lens comprises: a semi-finished ophthalmic lens blank 2; and a first dyeing layer 3 and a second dyeing layer 4 that have a surface of the semi-finished lens blank 2 dyed with a different color. The first dyeing layer 3 is formed at least in a far vision portion U of the semi-finished ophthalmic lens 2 when a wearer looks far and has a function of dimming or shielding light of a first wavelength component, and the second dyeing layer 4 is formed at least in a near vision portion D of the semi-finished ophthalmic lens 2 when the wearer looks near and has a function of dimming or shielding light of a second wavelength component.

Description

  The present invention relates to a spectacle lens that has been dyed.

  Conventionally, some spectacle lenses have been dyed on the lens surface for the purpose of improving fashionability or protecting eyes. For example, in order to obtain a cosmetic effect, a light shielding effect, and the like, the lens surface is dyed uniformly or with a density gradient (gradation).

  On the other hand, in recent years, plastic lenses are frequently used in place of conventional glass lenses because of their advantages such as light weight, excellent impact resistance, and easy dyeing. Recently, various functions have been added to such plastic lenses for eyeglasses by dyeing (see, for example, Patent Documents 1 to 3).

JP 2011-81228 A JP 2011-81232 A JP 2012-42522 A

  However, the function required for the spectacle lens differs depending on whether it is used indoors or outdoors. For this reason, conventionally, there has been an inconvenience that a plurality of glasses having different functions are prepared for each use such as indoor use and outdoor use, and the glasses must be put on again each time.

  The present invention has been proposed in view of such a conventional situation, and an object of the present invention is to provide a spectacle lens capable of further improving convenience.

  According to an aspect of the present invention, a lens base material, and a first dyeing layer and a second dyeing layer obtained by dyeing the surface of the lens base material with different colors are provided. At least when the wearer looks far away, it has a function of dimming or blocking the light of the first wavelength component, and the second dyeing layer has at least the wearer of the lens substrate. A spectacle lens is provided which is formed in a near portion when looking close and has a function of dimming or blocking light of a second wavelength component.

  According to the aspect of the present invention, the first dyeing layer and the second dyeing layer that dye the surface of the lens base material with different colors make the distance portion when the wearer looks far and the wearer close Different functions can be added to the near portion for viewing, thereby further improving convenience.

It is a top view of the lens for spectacles shown as one Embodiment of this invention. It is sectional drawing of the lens for spectacles by line segment X-X 'shown in FIG. It is the graph which measured the transmittance | permeability of a lens base material, a 1st dyeing | staining layer, and a 2nd dyeing | staining layer.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the drawings used in the following description may schematically show the features for convenience in order to make the features easy to understand, and the dimensional ratios of the respective components are the same as the actual ones. Is not limited.

  FIG. 1 is a plan view of a spectacle lens 1 shown as an embodiment of the present invention. FIG. 2 is a cross-sectional view of the spectacle lens 100 taken along line X-X ′ shown in FIG. 1. The solid line shown in FIG. 1 represents the shape of the spectacle lens 1 before lashing, and the two-dot chain line shown in FIG. 1 matches the spectacle lens 1 with the shape of the spectacle frame (frame). Represents the shape after crushing.

  The spectacle lens 1 includes a left eye and a right eye, and the left eye and the right eye have basically the same configuration except that they are bilaterally symmetrical. It shall be described collectively as 1. The eyeglass lens 1 shown in FIGS. 1 and 2 is for the right eye.

  As shown in FIGS. 1 and 2, the spectacle lens 1 includes a lens base 2 that has a circular shape in plan view, a first dyeing layer 3 that dyes the surface of the lens base 2 with different colors, and A second dyeing layer 4.

  The lens substrate 2 has two lens surfaces 2 a and 2 b that determine the lens characteristics of the spectacle lens 1. Of these two lens surfaces 2a and 2b, the object side surface (referred to as an outer surface) 2a forms a convex surface, and the eyeball side surface (referred to as an inner surface) 2b forms a concave surface.

  Further, as the lens substrate 2, for example, a lens having a power such as a single focus lens, a multifocal lens, or a progressive focus lens can be used. The lens substrate 2 containing the power has, for example, a function for correcting visual acuity such as myopia, hyperopia, astigmatism, and presbyopia. On the other hand, for the lens base material 2, for example, a lens that does not contain power, such as sunglasses and date glasses, can be used. The lens substrate 2 can be manufactured by a conventionally known manufacturing method using a conventionally known optical plastic material for eyeglasses.

The 1st dyeing | staining layer 3 is formed in the distance part U when the wearer of the lens base material 2 looks far away. The far portion U is a region on the upper side of the lens base 2 including the far pupil position EP ₁ when the wearer looks far away. In the present embodiment, the surface 2a of the lens substrate 2, of 2b, the over the upper side of the entire region across the horizontal line L passing between the pupil position EP ₂ pupil position EP ₁ and the near of the distance 1 dyeing layer 3 is formed.

  The first dyeing layer 3 has a function of reducing visible light (wavelength 380 to 780 nm) as light of the first wavelength component. Specifically, the average transmittance of visible light by the first dyeing layer 3 is preferably 50 to 95%, and more preferably 70 to 90%.

The second dyeing layer 4 is formed in the near portion D when at least the wearer of the lens substrate 2 looks close. Part D for near the wearer is lower-side region near the lens substrate 1 including the pupil position EP ₂ of when viewing nearby. In the present embodiment, the surface 2a of the lens substrate 2, among 2b, across the lower side whole area of sandwiching the horizontal line L passing between the pupil position EP ₂ pupil position EP ₁ and the near for far A second dyeing layer 4 is formed.

  The second dyeing layer 4 has a function of reducing blue light (wavelength 380 to 500 nm) as light of the second wavelength component. Specifically, the average transmittance of blue light by the first dyeing layer 3 is preferably 50 to 95%, and more preferably 70 to 90%.

In addition, the 1st and 2nd dyeing layers 3 and 4 can be formed using a conventionally well-known dyeing | staining method. Specifically, various methods have been implemented so far for dyeing plastic lenses (lens substrate 2). Among them, in particular, the following three dyeing methods (1) to (3) can be mentioned as methods for dyeing the lens substrate 2.
(1) A method of dyeing the surface of the lens substrate 2 by immersing the lens substrate 2 in a staining solution.
(2) A method of dyeing the surface of the lens substrate 2 by heating after coating the surface of the lens substrate 2 with a staining solution.
(3) A method of dyeing the surface of the lens base material 2 by coating the surface of the lens base material 2 with a sublimable dye and then allowing the sublimation dye to be heated and permeated.

  The spectacle lens 1 having the structure as described above has a high antiglare effect by the first dye layer 3 in the distance portion U and a high contrast improvement effect by the second dye layer 4 in the near portion D. have.

Here, the case where the lens 1 for spectacles of this invention is used outdoors is demonstrated.
When outdoors, for example, when performing sports or driving a car, it is often seen relatively far away. At this time, glare may be felt by light from the sun or headlamps of oncoming vehicles.

  Therefore, when used outdoors, the one having the characteristic of reducing visible light in the distance portion U, such as the spectacle lens 1 of the present invention, is effective. As described above, in the spectacle lens 1 of the present invention, the visible light can be reduced by the first dyeing layer 3 formed in the distance portion U, so that the antiglare effect can be enhanced. is there.

  Moreover, if the average transmittance | permeability of visible light by the 1st dyeing | staining layer 3 is 50 to 95% like the lens 1 for spectacles of this invention, it is possible to acquire sufficient anti-glare effect. Furthermore, if the visible light transmittance of the first dye layer 3 is 75% or more, it can be used during night driving.

On the other hand, the case where the lens 1 for spectacles of this invention is used indoors is demonstrated.
In the room, the screens of personal computers, TVs, mobile phones, etc., which are relatively close to each other, are often viewed. Liquid crystal displays are often used in personal computers, televisions, and mobile phones. Recently, an LED using a backlight for a liquid crystal display has become widespread. Also, general lighting such as room lights, which use LEDs for improving environmental awareness and saving power, is beginning to spread rapidly.

  In the LED, the intensity of blue light, which is a wavelength component on the short wavelength side, is higher in the visible light region than the CCFL used in the backlight of a conventional liquid crystal display. Blue light is irritating to the eyes, and tends to increase discomfort such as the eyes are apt to get tired and the glare is strongly felt. Furthermore, blue light is also a cause of a decrease in contrast due to scattering in the eye and chromatic aberration on the retina.

  Therefore, when used indoors, as in the eyeglass lens 1 of the present invention, the near portion D having the characteristic of reducing blue light is effective. As described above, in the spectacle lens 1 of the present invention, the blue light can be attenuated by the second dyeing layer 4 formed in the near portion D, so that the contrast can be increased.

  In addition, as in the case of the spectacle lens 1 of the present invention, if the average transmittance of blue light by the second dye layer 4 is 50 to 95%, a sufficient contrast improvement effect can be obtained.

  A lens that has been dyed to reduce blue light has a color from yellow to orange. For this reason, even if the color is too dark, what is seen through the lens is a yellowish to orangeish color. Therefore, it is preferable to adjust the color so that the color cannot be determined correctly or the possibility of feeling uncomfortable appears.

  As described above, when the spectacle lens 1 of the present invention is used, as in the past, a plurality of spectacles having different functions for each application such as indoor use and outdoor use are prepared, and the spectacles are put on again each time. Is no longer necessary. As a result, it is possible to further improve convenience.

  In particular, when the spectacle lens 1 is a progressive focus lens, the use of the distance portion U containing the distance power and the near portion D containing the near power is different between the above-mentioned outdoor and indoor use. Since it matches the usage pattern, it is very suitable.

  In addition, during driving, not only the above-mentioned usage form such as outdoors or indoors, the distance portion U for visually recognizing the front through the windshield and the near portion D for visually recognizing the meter panel are properly used. In such a case, the spectacle lens 1 of the present invention can be preferably used.

  In addition, this invention is not necessarily limited to the thing of the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.

  Specifically, in the spectacle lens 1, a function (antiglare effect) of reducing visible light by the first dyeing layer 3 formed in the distance portion U and a second formed in the near portion D. However, the present invention is not necessarily limited to such a configuration.

  For example, in the spectacle lens 1, light (infrared light) in a wavelength region (wavelength of 780 nm or more) longer than the visible light region is applied to the first dyeing layer 3 and / or the second dyeing layer 4. It is also possible to add a function of reducing or blocking light, or a function of reducing or blocking light (ultraviolet light) in a wavelength range shorter than the visible light range (wavelength of 380 nm or less).

In the eyeglass lens 1, the first stained layer 3 is formed on the upper side and the lower side across the horizontal line L that passes between the distance pupil position EP ₁ and the distance pupil position EP _2. Although the second dyed layer 4 is formed, the formation positions (dyed regions) of the first dyed layer 3 and the second dyed layer 4 are not necessarily limited to such a structure. Is not to be done.

  For example, the spectacle lens 1 may have a configuration in which the first dyeing layer 3 and the second dyeing layer 4 are partially overlapped. That is, the 1st dyeing | staining layer 3 may be the structure formed ranging from the distance part U to a part of the near part D, and the 2nd dyeing layer 4 may be the distance part U from the near part D. The structure formed over a part of may be sufficient. Furthermore, the boundary line between the first dyeing layer 3 and the second dyeing layer 4 is not limited to the position of the horizontal line L, and can be appropriately changed.

  Moreover, the said 1st dyeing | staining layer 3 and the 2nd dyeing | staining layer 4 may have the structure which has gradation (light / darkness), respectively. That is, the first dyed layer 3 and the second dyed layer 4 may have different concentration distributions at the respective formation positions (dyed areas).

  In the eyeglass lens 1, in addition to the first and second dye layers 3 and 4, functions such as a hard coat film and an antireflection film are further provided on the surfaces 2 a and 2 b of the lens base 2. It is possible to form a laminated film.

  Hereinafter, the effects of the present invention will be made clearer by examples. In addition, this invention is not limited to a following example, In the range which does not change the summary, it can change suitably and can implement.

  In this example, first, a staining solution was prepared from a dye, a surfactant, and pure water. Specifically, 1000 parts by weight of pure water is taken in a container, 4.3 parts by weight of Kayalon polyester yellow AL dye as a yellow dye, and 0.2 parts by weight of Kayalon polyester red AUL-S dye as a red dye, What added 0.7 parts by weight of Kayalon polyester blue AUL-S dye as a blue dye (all dyes are manufactured by Nippon Kayaku Co., Ltd.) and 1 part by weight of Nikka Sun Salt # 7000 (manufactured by Nikka Chemical Co., Ltd.) Was stirred to obtain a first staining solution.

  Next, a plastic lens having a refractive index of 1.67 (Nikon Pressio Advance FA-14, manufactured by Nikon Essilor Co., Ltd.) is prepared as a lens base material. The upper half including the far pupil position was immersed and pulled up after 5 minutes to form a first dyed layer.

  Next, 1000 parts by weight of pure water is placed in a container, 3.0 parts by weight of Kayalon Polyester Yellow AL dye as a yellow dye, and 0.1 parts by weight of Kayalon Polyester Red AUL-S dye as a red dye (any dye) And Nippon Kayaku Co., Ltd.) and 1 part by weight of Nikka Sun Salt # 7000 (Nikka Chemical Co., Ltd.) were stirred to obtain a second dyeing solution.

  Next, the second staining liquid is heated to 93 ° C., and the lower half including the uncolored near pupil position of the plastic lens having the upper half stained as described above is used as the second staining liquid for 8 minutes. After dipping, the film was pulled up to form a second dyed layer.

  Next, a hard coat film and an antireflection film were laminated on the surface of the dyed plastic lens to obtain a spectacle lens of the present invention.

  Here, for the spectacle lens, the transmittance (%) in the visible light region (wavelength 380 to 780 nm) of the plastic lens before forming the first and second dyeing layers, and the first dyeing of the plastic lens. The result of measuring the transmittance (%) at the position where the layer was formed (distance portion) and the transmittance (%) at the position where the second dye layer of this plastic lens was formed (near portion) As shown in FIG.

  As shown in FIG. 3, at the position where the first dyeing layer is formed (distance portion), the transmittance is reduced over the entire visible light region. It turns out that it has the characteristic to make it light. On the other hand, at the position where the second dyed layer is formed (the near portion), the transmittance is reduced in the short wavelength side of the visible light region, so the blue light is attenuated in the near portion. It turns out that it has the characteristic to make it.

  Then, this spectacle lens is processed to match the shape of the spectacle frame (referred to as lashing), and after this processed lens is fitted into the spectacle frame (referred to as frame insertion), a monitoring test by the wearer is performed. Carried out. As a result, the wearer received an evaluation that there was little eye strain as it was clearly different from the lens before dyeing.

  DESCRIPTION OF SYMBOLS 1 ... Lens for glasses 2 ... Lens base material 3 ... 1st dyeing layer 4 ... 2nd dyeing layer U ... Distance part D ... Near part

Claims (7)

A lens substrate;
A first dyed layer and a second dyed layer dyed with a different color on the surface of the lens substrate;
The first dyeing layer is formed in at least a distance portion when the wearer of the lens substrate looks far away, and has a function of dimming or blocking light of the first wavelength component,
The second dyeing layer is formed in at least a near-use portion when the wearer of the lens substrate looks close, and has a function of dimming or blocking light of the second wavelength component. A spectacle lens.   The spectacle lens according to claim 1, wherein the light of the first wavelength component is visible light, and the light of the second wavelength component is blue light.   The average transmittance of the visible light by the first stained layer is 50 to 95%, and the average transmittance of the blue light by the second stained layer is 50 to 95%. The spectacle lens according to 1 or 2.   The distance-use portion has a high anti-glare effect by the first dye layer, and the near-use portion has a high contrast improvement effect by the second dye layer. The spectacle lens according to one item.   The first dye layer and the second dye layer are formed on the surface of the lens base material with a horizontal line passing between the distance pupil position and the near pupil position interposed therebetween. The spectacle lens according to any one of claims 1 to 4.   The spectacle lens according to any one of claims 1 to 5, wherein the first dyeing layer and the second dyeing layer are partially overlapped with each other.   The spectacle lens according to claim 1, wherein the first dyeing layer and / or the second dyeing layer has gradation.

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