JPH1082975A - Light quantity adjusting spectacles and light quantity adjuster for eye - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the quantity of light entering the eyes and to protect the eyes against the light, by providing the peripheral parts of lenses with low-transmittance parts lower in transmittance of light than the central parts of the lenses. SOLUTION: The right and left lens parts 5 of a main body 2 are continuos without having boundaries. The lens parts 5 and lens frame parts 6 are integrally formed by plastic. Transmittance adjusting plates 7 spreading across both lens parts 5 are mounted at the rear surfaces of the lens parts 5. The lens frame parts 6 project backward from the peripheral edges of the lens parts 5. The transmittance adjusting plates 7 are fitted into such lens frame parts 6. The transmittance adjusting plates 7 function to make the transmittance of the light in the peripheral parts of the lens parts 5 lower than the transmittance of the light in the central parts (the sections facing the eyeballs) and are formed to a thin sheet shape having approximately the same external shape as the external shape of the lenses. These plates are formed by opaque plastic films (or paper) having through-holes 8 formed in the central parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light amount adjusting spectacle and an eye light amount adjusting device.

[0002]

2. Description of the Related Art Sunglasses are known to protect eyes from sunlight. The sunglasses use colored glass or plastic lenses to reduce the amount of light reaching the eyes through the lenses, thereby protecting the eyes from ultraviolet rays of the sun. In recent years, sunglasses with a reflection filter have been developed in which the transmittance of visible light is reduced to about 10% by depositing metal on the front surface of the lens.

As a means for adjusting the amount of light entering the eye, the present applicant has previously developed a cataract vision aid. It has a cylindrical part in the center, and a flange is formed at one end of the cylindrical part, which reduces the amount of light reaching the fundus through the periphery of the crystalline lens of the eye by mounting the flange on the front of the eyeglasses (Japanese Patent Laid-Open No. 7-
No. 255770). That is, when the eye suffers from cataract, the peripheral portion of the lens becomes opaque, and light diffusely reflects in the opaque portion, so that the object becomes hazy. Since the amount of light passing through the periphery of the object becomes small, the degree of diffuse reflection is reduced, and the object can be seen relatively clearly.

[0004]

However, conventional sunglasses have a uniform light transmittance over the entire surface of the lens. Therefore, if the light transmittance is lowered to enhance the eye protection effect, the object becomes more difficult to see, and if the light transmittance is increased to make the object easier to see, the amount of light entering the eye is increased, which is called eye protection. In terms of terms.

On the other hand, in the case of the above-mentioned cataract vision aid, the amount of light entering the eye is small, but the object can be seen from the light transmission at the center, so that the object can be seen clearly while reducing the amount of light. To meet conflicting demands. However, since it is attached to the front of the lens, the spectacles are given a feeling of having a foreign substance.

On the other hand, in recent years, televisions, word processors, computers, and the like have become widespread, and these screens are often viewed for a long time. It is necessary to protect the eyes from the relatively light emitted from these screens. is there. Also,
In a room that is considerably brightened by a light, the screen becomes difficult to see, so that there is a problem that eyes are easily tired, and it is necessary to cope with such light of the light.

[0007]

Therefore, the present inventor has proposed that a person can reduce the amount of light entering the eyes by, for example, withdrawing his eyes when his surroundings are too bright, holding his hand over his forehead, or putting on his hat deeply. In view of this, the above problem is solved by applying such an operation to spectacles so as to give the spectacles themselves a function of reducing the amount of light.

[0008] That is, the invention according to claim 1 of the present application is a light amount adjusting spectacles in which the light amount entering the eye is adjusted, wherein a low transmittance portion having a lower light transmittance than the lens central portion is provided at a peripheral portion of the lens. It is characterized by having.

That is, in the case of the glasses, since the center of the lens portion of the glasses has high light transmittance, a person can relatively clearly see an object through the high transmittance portion in the center of the lens. The low transmittance portion around the lens can reduce the amount of light entering the eye, which is effective in protecting the eye from light, and when the eye has a cataract, the light in the lens Reduce diffuse reflections to make things easier to see. The low transmittance portion may be formed all around the periphery of the lens, or may be formed in a part of the periphery of the lens.

[0010] The low transmittance portion is provided with a mirror coat which forms a semi-transparent mirror which transmits a part of light and reflects a part of the light on the periphery of the lens, or coloring the periphery of the lens (partial reflection). It can be formed by attaching a translucent film or the like.

An invention according to claim 2 of the present application is a detachable light amount adjuster mounted on the rear surface of a lens of spectacles, which is formed in a thin plate shape having substantially the same outer shape as the lens and has a central portion. It is characterized by having a hole for narrowing a range through which the light of the lens is transmitted. ● The glasses referred to in the present invention may be for nearsighted, farsighted, or sunglasses.
The lens may be one in which the left and right lens parts are connected without a boundary, or the left and right lenses may be independent,
Further, a mirror coat that forms a semi-transparent mirror that transmits part of light and reflects part of light may be provided on the front surface of the lens. Further, even if the lens and the lens frame are formed separately and the glasses are of a type in which the lens is fitted to the lens frame, or the lens and the lens frame are integrally formed of plastic. Good. Further, the light amount adjusting tool can be formed of paper, plastic, or the like.

In the case of the present invention, by attaching the light amount adjusting device to the spectacles, transmission of light around the lens can be prevented, and the same operation and effect as the invention according to claim 1 can be obtained. And since this light amount adjuster can be attached to and detached from spectacles, if you have several kinds of light amount adjusters with different hole sizes, use a large hole indoors and a small hole outdoors. Alternatively, when viewing a screen of a television or the like, a light amount adjusting tool can be used properly, such as using a small hole, so that an appropriate amount of light can be seen.

With respect to the light amount adjusting device, an adhesive is applied to a contact surface of the light amount adjusting device with respect to the lens, or an infinite number of micro unevenness having a sucker effect is formed on the corresponding contact surface, so that the rear surface of the lens is adjusted. Various attachment / detachment means such as providing an engaging portion on a lens frame or a lens of spectacles and providing a detachable engaging portion on the engaging portion on the light amount adjusting device. Can be adopted.

[0014] The invention according to claim 3 of the present application relates to a detachable light amount adjuster attached to spectacles when the lens frame of the spectacles has a protruding edge protruding rearward from the peripheral edge of the lens. Things.

This light quantity adjusting device is formed in a thin plate shape having an outer shape substantially the same as that of the lens, has a hole in a central portion for narrowing a light transmitting range of the lens, and has a peripheral edge of the lens frame. The lens is fitted into the lens frame from the rear side of the lens so as to contact the inner surface of the protruding edge of the lens.
A mirror coat may be provided on the front surface of the lens.

The eyeglasses according to the present invention are described in claim 2
Like the invention according to the second aspect, the type is not limited, and the light amount adjuster can be formed of paper, plastic, or the like, as in the second aspect. And also in the case of the present invention, by attaching the light amount adjuster to the glasses,
The same function and effect as the second aspect can be obtained.

[0017] The invention according to claim 4 of the present application relates to a light amount adjusting spectacle, which forms a semi-transparent mirror that transmits a part of light and reflects part of the light over the entire front surface of a transparent lens. A mirror coat (for example, a metal vapor-deposited film) is provided, and light is irregularly reflected on at least a part of the peripheral portion of the rear surface of the lens such that the light transmittance of the peripheral portion of the lens is lower than that of the central portion of the lens. It is characterized in that minute irregularities are formed.

In the case of these spectacles, the light transmittance is low at the central portion of the lens due to the mirror coat on the front surface of the lens, but the light is irregularly reflected at the peripheral portion of the lens not only by the mirror coat but also by minute irregularities on the rear surface of the lens. Therefore, the light transmittance is further lower than that of the central part of the lens.

Therefore, although the amount of light passing through the center of the lens is relatively large, the amount of light passing through the periphery of the lens is smaller than that at the center of the lens, and the same effects as those of the invention described above can be obtained. In addition, even when looking at the spectacles from the front, the mirror coat on the front of the lens forms a semi-transparent mirror and reflects the incident light, making it difficult to see minute irregularities on the back of the lens,
This is advantageous in appearance.

The invention according to claim 5 of the present application relates to a light amount adjusting spectacle, which forms a semi-transparent mirror that transmits a part of light and reflects part of the light over the entire front surface of a transparent lens. A mirror coat is provided, and a transmittance adjusting plate is attached to the rear surface of the lens so as to lower the transmittance of at least a part of the light around the lens to the transmittance of light at the center of the lens. And

According to the present invention, the minute irregularities referred to in the fourth aspect of the invention are replaced with the transmittance adjusting plate, and the same operation and effects as those of the fourth aspect of the invention are obtained. The transmittance adjusting plate may be one that makes light transmittance substantially zero.

According to a sixth aspect of the present invention, a lens is provided on the upper edge of the light quantity adjusting glasses according to the first aspect of the present invention, which projects rearward from the upper edge and abuts on or approaches the lower side of the forehead of the person. It is characterized in that a awning for reducing the amount of light entering from above with the eyes is provided.

The awning protects the eyes by preventing light from entering the eyes unnecessarily from above,
Alternatively, the amount of irregular reflection of light around the crystalline lens of the eye having a cataract is reduced. Especially when outdoors, direct sunlight easily enters the eyes from above, and in this case, the sunshade works effectively.

According to a seventh aspect of the present invention, there is provided a light quantity adjusting spectacle according to the first aspect, wherein the spectacles are detachably attached to a rear surface of a lens of the spectacle to narrow a range of a high light transmittance portion at a central portion of the lens. It is a combination with a light quantity stop device.

In the light-amount adjusting glasses, the range of the portion where the light transmittance is high at the center of the lens is constant. Or request (user preference, etc.)
The amount of light can be reduced according to. In particular, if several types of light-amount aperture devices having different light-amount aperture amounts are possessed and used properly, an appropriate light amount according to the situation can be obtained.
As the light amount stop device, the light amount adjustment device described in the second aspect of the invention can be applied.

The invention according to claim 8 of the present application relates to a light amount adjusting spectacle, which comprises a first lens having a light transmittance at a peripheral portion of the lens lower than that of the central portion of the lens, and A connected vine, and a detachable second lens for visual acuity adjustment supported by a lens peripheral portion or a lens frame of the first lens and arranged so as to overlap a lens central portion of the first lens. It is characterized by being.

Eyeglasses having a lens whose light transmittance at the periphery of the lens is lower than that at the center of the lens are useful for protecting the eyes or for cataracts as described above. A second lens for adjusting visual acuity is provided so that simple glasses can be easily used for myopia or hyperopia. Since the second lens is detachable, it can be used only when it is necessary to enhance visual acuity.

According to a ninth aspect of the present invention, in the light amount adjusting glasses according to the eighth aspect, a hole having a diameter smaller than that of the second lens is provided, and the hole is provided at a central portion of the second lens. The second lens is superimposed on the second lens so as to be disposed at the peripheral portion of the first lens or the lens frame together with the second lens, and the area through which the light of the second lens is transmitted is reduced to the size of the hole. It is characterized by having a cover.

In this invention, the cover functions as the light amount stop device according to the seventh aspect of the present invention, and has the same operation and effect as the seventh aspect of the present invention. As the cover, a cover that is detachable from the second lens, such as the light amount adjuster according to the second aspect of the present invention, is preferable, and a cover that covers the second lens may be used.

[0030] The invention according to claim 10 of the present application is a light amount adjusting spectacle, which comprises a lens having a lower light transmittance at a peripheral portion of the lens than a central portion of the lens, a vine connected to the lens, A detachable light amount stop device supported by a lens peripheral portion or a lens frame of the lens and disposed so as to overlap with a lens center portion of the lens, wherein the light amount stop device includes a frame member and the lens center portion. And a cover having a smaller diameter than the frame member so that the hole is disposed at the center of the frame member.

In the present invention, the second lens according to the ninth aspect of the present invention is replaced with a frame member.
The same operation and effect as those of the invention according to the first aspect are exhibited.

The invention according to claim 11 of the present application relates to a light amount adjusting spectacle, which has an eave protruding forward from an upper portion of a lens portion.

In the case of these spectacles, the eaves prevent light from entering the eye from above, thereby protecting the eye. In addition, when the eye suffers from cataract, the amount of diffuse reflection of light around the crystalline lens is reduced. Less.

[0034]

Accordingly, the present invention relates to the invention relating to the light amount adjusting glasses in which a portion having a high light transmittance is formed at the center of the lens and a portion having a low light transmittance is formed at the periphery of the lens. For example, it can protect the eye from light while making the object relatively visible in the center of the lens, and reduce the diffuse reflection of light around the crystalline lens for eyes with cataracts. Can be easily seen.

Further, according to the invention relating to the light amount adjusting device of the present application, the light amount adjusting device is mounted on ordinary glasses to reduce the light transmittance at the peripheral portion of the lens so that the object can be seen relatively clearly at the central portion of the lens. The eye can be protected from light, and the eye with cataract can reduce the irregular reflection of light around the crystalline lens and can easily see the object.

Further, according to the invention having a light amount stop device of this application, the range of the central portion of the lens having a high light transmittance is narrowed to optimize the light amount entering the eye, thereby providing eye protection or cataract. be able to.

Further, according to the invention of this application relating to the light amount adjusting glasses provided with the eaves on the upper part of the lens portion, the eaves can protect the eyes or make the objects easily visible.

[0038]

BEST MODE FOR CARRYING OUT THE INVENTION

<Embodiment 1> The light amount adjusting glasses 1 shown in FIG. 1 are a spectacle body 2 provided in front of the eyes, left and right vines 3 and 3 pivotally attached to both ends of the body 2, respectively, and attached to an upper edge of the body 2. Awning 4. As shown in FIG. 2, the left and right lens portions 5 and 5 of the main body 2 are continuous without any boundary, and the lens portions 5 and 5 and the lens frame portion 6 are integrally formed of plastic. On the rear surface of the lens units 5, 5, a transmittance adjusting plate 7 that spreads over the two lens units 5, 5 is mounted.

The lens frame 6 projects rearward from the peripheral edges of the lens portions 5, 5, and the transmittance adjusting plate 7 is fitted into the lens frame 6. The transmittance adjusting plate 7 lowers the transmittance of light at the peripheral portion of the lens portion 5 than the transmittance of light at the central portion (a portion facing the eyeball). It is formed by the formed opaque plastic film (or paper). In addition, as shown in FIG.
A mirror coat 9 that forms a semi-transparent mirror that transmits part of light and reflects part of the light is provided over the entirety.

At the rear end of the upper edge of the lens frame 6, a hook 6a protruding upward for mounting the sunshade 4 extends along the upper edge. The awning 4 is a lens unit 5
Is formed of flexible plastic (or rubber) for reducing the amount of light that enters from above between the eye and the eye A, and is formed by an engagement recess 4a that fits into the hook 6a.
And a sunshade that projects rearward from the base and whose tip abuts (or approaches) the lower side of the forehead of the person.

The base of the awning 4 is curved in accordance with the curvature of the hook 6a of the lens frame 6, but the radius of curvature of the awning base is slightly smaller than the radius of curvature of the hook 6a. ing. Therefore, when the engaging recess 4a of the sunshade 4 is fitted into the hook 6a, a force is applied to the base of the sunshade 4 to reduce the radius of curvature, and this force causes the engaging recess 4a, the hook 6a and The fit between them becomes strong.

As shown in FIG. 4, a ventilation hole 4b is formed at the base of the sunshade 4 in the front-rear direction. In addition, a nose hook 6 which is hung on the left and right slopes of the nose in the center of the lens frame 6.
The spaces b and 6b are deeply cut upward so as to form a ventilation gap between the space between the nose hooks 6b and 6b and the nose muscle. The base of the vine 3 pivotally attached to the eyeglass body 2 is formed to be wide vertically, and the vertical width is gradually narrowed toward the ear hook portion. The reason why the pivot portion of the vine 3 is formed wide is to limit the amount of light entering the eye from the side. A vent 3a is formed in the widened portion.

Accordingly, in the case of the light amount adjusting glasses 1, the peripheral portion of the lens is covered by the transmittance adjusting plate 7, so that the light transmittance is substantially zero. On the other hand, the central portion of the lens is provided with the through hole 8 of the transmittance adjusting plate 7.
As a result, light passes therethrough, and its transmittance depends on the transmittance of the mirror coat 9.

Therefore, while a person can visually recognize an object relatively clearly from the center of the lens, no light enters from the periphery of the lens. Further, when the sunshade 4 is mounted on the spectacles 1, the upper light is restricted from entering the eye from between the forehead H and the spectacle body 2, and the light from the side is restricted by the wide part of the vine 3. Will be limited. Such a limitation in light intensity protects the eye from strong light and, if the eye has a cataract, reduces the scattering of light around the lens, making it easier to see things clearly. I do. Further, since a part of the light is reflected by the mirror coat 9, even when the spectacles 1 are viewed from the front, the transmittance adjusting plate 7 is provided on the rear surface of the lens.
It is difficult to understand that there is.

In the case of the glasses 1, the vine 3 and the sunshade 4 have ventilation holes 3a and 4b, and the nose bridges 6b and 6b.
Since a gap for ventilation is formed between b and the nose, the space around the eyes is not sealed, and the lens portion becomes cloudy due to a change in temperature or the like. Is prevented by

It should be noted that the transmittance adjusting plate 7 is
The lens 5 may be detachably attached to the lens 5 by forming an infinite number of micro unevenness having a sucker effect on a contact surface with the lens 5. Examples of those having countless micro unevenness having such a sucker effect include PET (polyethylene terephthalate) having a countless number of fine pores opened on the surface, such as HISTAR (registered trademark) -FK manufactured by Techno Hirose. ) Films are preferred.

Further, since the transmittance adjusting plate 7 of the above embodiment is opaque, the light transmittance of the peripheral portion of the lens is substantially zero, but the transmittance adjusting plate 7 is made of a colored transparent plastic. When formed by film,
Light can be transmitted slightly. Further, instead of mounting or bonding the transmittance adjusting plate 7, the transmittance of light around the lens may be reduced by applying a colored paint or forming a mirror coat.

FIG. 5 shows a modification of the present embodiment, in which the transmittance adjusting plate 7 is provided in a band shape on the upper part of the lens portion 5 with the inner side slightly wide.

<Embodiment 2> This embodiment is shown in FIG. 6, in which a rib 7a is provided to protrude rearward over the entire periphery of the through hole 8 of the transmittance adjusting plate 7, and the through hole 8 is formed. It is formed in a cylindrical hole shape. Transmittance adjustment plate 7
The plate body and the rib 7a are integrally formed of opaque plastic. The lens unit 5 has a mirror coat (not shown) on the front surface, as in the previous embodiment.

In this embodiment, the same effects as those of the previous embodiment can be obtained.
The rib 7a on the periphery of the lens prevents the eye protection, and also reduces the light scattering at the opaque part of the crystalline lens even when the eye suffers from cataract.

<Embodiment 3> This embodiment also relates to a light amount adjusting spectacle, and its main part is shown in FIG. That is, the rear surface of the lens portion 5 of the spectacle body 2 has a lens central portion 5a that is finished smoothly, but microscopic irregularities 5b that diffusely reflect light are formed around the lens. A mirror coat 9 similar to that of the previous embodiment is provided on the front surface of the lens unit 5.
Are formed.

Therefore, in the case of the light amount adjusting glasses, since the light is irregularly reflected at the peripheral portion of the lens, the light transmittance is lower than that of the lens central portion 5a, and the same effect as that of the previous embodiment can be obtained. .

The fine irregularities 5b are formed by engraving a large number of horizontal grooves in parallel at minute intervals around the rear surface of the lens portion 5, engraving a large number of vertical grooves and horizontal grooves in a grid pattern, The recesses can be formed by densely scattering the recesses.

<Embodiment 4> This embodiment is shown in FIG. 8 and relates to a light amount adjuster 7A detachable from the eyeglass body 2.

That is, the eyeglass body 2 is composed of left and right independent lenses 5, 5 and a lens frame 6 in which the lenses 5, 5 are fitted.
The vine 3 is connected to the lens frame 6.
The lens frame 6 has a protruding edge 6 </ b> A protruding rearward from the peripheral edge of the lens 5. The light amount adjuster 7A is formed of plastic or paper into a thin plate shape having substantially the same outer shape as the lens 5, and has a hole 8 at the center for reducing the light amount. The light amount adjuster 7A is fitted to the lens frame 6 from the rear side of the lens frame 6 so that the peripheral edge thereof contacts the inner surface of the projecting edge 6A of the lens frame 6, and is attached to and detached from the eyeglass body 2. It is free.

Therefore, in the case of the present embodiment, by attaching the light amount adjusting device 7A to the spectacles, the range through which the light of the spectacles can be transmitted can be reduced to the size of the hole 8 of the light amount adjusting device 7A. In this case, the glasses may be for myopia, for farsightedness, or sunglasses.

<Embodiment 5-1> The main parts of this embodiment are shown in FIGS.

That is, the spectacle body 2 has fine irregularities 5b formed on the periphery of the rear surface of the lens portion 5 in the same manner as in the second embodiment, and has hook portions at three places around the smooth lens central portion 5a. 5c is formed. The hook 5c is
It is formed in an inverted L-shape so as to form a concave portion opened toward the lens central portion 5a between the rear surface of the lens portion 5 and the peripheral portion of the second lens 12 so as to fit into the concave portion. Has become.

One of the three hooks 5c is located on the lower edge of the smooth lens central portion 5a, and the other two are located on both upper edges of the lens central portion 5a. Further, a bar-shaped stopper 10 is provided at a position above the outer hooking portion 5c in the lens portion 5. This stopper 10
Has a base end pivotally attached to the lens unit 5 so as to be rotatable, and is urged by a spring (not shown) so as to rotate counterclockwise in the figure, and a tip end of the outer hooking portion. 5c and is stopped.

The second lens 12 is for near vision (or for long vision)
And is fitted from above between the hooks 5c on the both side edges and supported by the hooks 5c on the lower edge. The distance between the hooks 5c on both side edges is slightly smaller than the width of the corresponding part of the second lens 12. That is, when the second lens 12 is mounted, the second lens 12 is press-fitted between the engaging portions 5c on the both side edges while the stopper 10 is rotated upward.
The lower edge is supported by a hook 5c, and the stopper 1
0 is held against the upper edge of the second lens 12.

Therefore, the light amount adjusting glasses of the present embodiment can be said to be useful for people with myopia or hyperopia.

The hook 5c is made of an elastic material and is screwed to the lens 5, so that the second lens 12 is held by utilizing the elasticity of the hook. Good.

<Embodiment 5-2> The main part of this embodiment is shown in FIGS.

The eyeglass body 2 has a lens frame 6 into which the lens 5 is fitted. A plate 7 having a through hole 8 is attached to the rear surface of the lens 5. Three lens supports 11 protrude from the lens frame 6 toward the center of the lens 5 on the rear surface side of the lens 5. And these three lens supports 11
The second lens 12 is fitted together with the light amount aperture cover 20. The light amount aperture cover 20 is a plate-shaped member made of opaque plastic or paper, and has countless micro unevenness having a suction effect for attaching and detaching it to and from the second lens 12, and has a light at the center thereof. A hole 20a is formed to further narrow the range through which the light passes through from the size of the through hole 8 of the plate 7. The second lens 12 and the light amount aperture cover 20 are detachable from the lens support 11. A mirror coat may be provided on the front surface of the lens 5.

<Embodiment 5-3> The main part of this embodiment is shown in FIG.

In the case of the embodiment 5-1 described above, the hook 5c of the second lens 12 has a hook shape.
The two hooks 5c are formed by protrusions projecting slightly inward such that the distance between the hooks 5c gradually narrows as they go forward. The second lens 12 and the light amount aperture cover 20 are detachably fitted to the three hooks 5c. The light amount aperture cover 20 includes the lens unit 5 and the second lens 1.
2 between.

<Embodiment 5-4> The essential parts of this embodiment are shown in FIGS.

The eyeglass body 2 has a lens frame 6 into which the lens 5 is fitted. A plate 7 having a through hole 8 is attached to the rear surface of the lens 5. Projections 7b protrude rearward from three peripheral portions of the through hole 8 of the plate 7. The second lens 12 is fitted on the second lens frame 12a. The second lens frame 12a has an engaging portion 1 having holes at three locations corresponding to the three projections 7b.
2b is provided. A light amount aperture cover 20 similar to that in the embodiment 5-2 is mounted on the rear surface of the second lens 12. The second lens 12 and the light amount aperture cover 20 are detachable from the plate 7. A mirror coat may be provided on the front surface of the lens 5.

<Embodiment 5-5> FIG. 17 shows a main part of this embodiment.

The eyeglass body 2 has a lens frame 6 into which the lens 5 is fitted. A plate 7 having a through hole 8 is attached to the rear surface of the lens 5. A rib 7c projects rearward from the peripheral edge of the through hole 8 of the plate 7 all around. The second lens 12 is fitted inside the rib 7c of the plate 7. Embodiment 5 on the rear surface of the second lens 12
The same light amount aperture cover 20 as that of No. 2 is attached. The second lens 12 and the light amount aperture cover 20 are detachable from the plate 7. A mirror coat may be provided on the front surface of the lens 5. Rib 7c has through hole 8
May be provided intermittently at the peripheral portion of.

<Embodiment 6> This embodiment is a combination of light amount adjusting glasses and a light amount stop device, and is shown in FIGS. 18 and 19. First, as in the case of Embodiment 5-1, the light amount adjusting glasses have minute irregularities 5b formed on the periphery of the rear surface of the lens portion 5 of the eyeglass body 2, and have three smooth peripheral portions of the lens central portion 5a. Is formed with a hook portion 5c. The light stop 13 is detachable from the eyeglass body 2 by the three hooks 5c.

That is, the light quantity stop device 13 is formed by a metal frame 14 made of a spring wire formed in a concave shape following the outer shape of the smooth lens central portion 5a, and an opaque aperture cover 15 to cover the metal frame 14. ing. At both ends of the metal frame 14, locking portions 14a, 14a bent outward are formed. The aperture cover 15 is formed in a flat bag shape by a plastic film, and has a through hole 15a having a diameter smaller than that of the lens central portion 5a at front and rear opposing portions.

In use, the metal frame 14 is bent inward, and the aperture cover 15 is fitted on the metal frame 14. The aperture cover 15 is in a tight state by the elastic restoring force of the metal frame 14, and the front and rear through holes 15a, 15a are opposed to each other. Then, when the light amount stop device 13 is fitted to the hooking portion 5c of the spectacle body 2 while bending the metal frame 14 inward, it is held elastically with respect to the spectacle body 2 by the elastic restoring force of the metal frame 14. .

Therefore, in the light quantity adjusting glasses to which the light quantity diaphragm 13 is attached, the range of the portion where the light transmittance is high is narrowed from the size of the lens central portion 5a to the size of the through hole 15a of the light quantity diaphragm 13. Will be. For this reason, it is advantageous for protecting the eyes when receiving strong light, and it is possible to narrow the visual field according to the degree of progress of the cataract (the opacity part around the lens expands to the center part) Things become easier to see).

In this embodiment, the aperture cover 1 is attached to the metal frame 14.
Although the fifth lens 5 is fitted, when the second lens 12 is locked to the hook 5c as in the third embodiment, the aperture cover 15 may be fitted to the second lens 12.

FIG. 20 is also suitable as a light amount stop device. That is, the light amount stop device 16
An opaque plate having the same (or slightly larger) outer shape as the lens central portion 5a having a high light transmittance so as to be held by the engaging portion 5c, It has a hole 16a.

Other examples of the light amount stop device include a transparent lens having a transmittance adjusting plate with a hole attached to one side thereof, a colored paint applied to a peripheral portion of one side of the transparent lens, or a diffused reflection coating on the peripheral portion. It may be one in which minute irregularities are formed so as to be seen through from a central portion where no coating or the like is applied.

<Embodiment 7> This embodiment is also a combination of the light amount adjusting glasses and the light amount stop device, and is shown in FIGS. First, as in the case of Embodiment 5-1, the light amount adjusting glasses have minute irregularities 5b formed on the periphery of the rear surface of the lens portion 5 of the eyeglass body 2, and have three smooth peripheral portions of the lens central portion 5a. Is formed with a hook portion 5c. The light-amount iris 13A is detachable from the spectacle body 2 by the three hooks 5c.

That is, the light amount stop device 13A includes a frame member 14A formed according to the outer shape of the lens central portion 5a,
The opaque aperture cover 15A is formed on the frame member 14A. The aperture cover 15A is formed in a flat bag shape by a stretchable plastic film, and has a through hole 15Aa having a diameter smaller than that of the lens central portion 5a at opposing front and rear portions.

In use, the aperture cover 15A is put on the frame member 14A, and the obtained light amount aperture 13A is fitted to the hook 5c of the eyeglass body 2. Thereby, Embodiment 6
In the same manner as described above, the light amount can be reduced.

FIG. 23 shows an example in which the above-mentioned aperture cover 15A is applied to the second lens 12 of the fifth embodiment. It is possible to perform aperture stop of the light amount.

<Eighth Embodiment> This embodiment also relates to a combination of light amount adjusting glasses and a light amount stop device, and is shown in FIG.

First, similarly to the third embodiment, the light amount adjusting glasses have minute irregularities 5b formed around the rear surface of the lens portion 5 of the spectacle body 2 and have three irregularities around the smooth lens central portion 5a. The protrusion 5d is formed at a location. The three light projections 5 d make the light amount diaphragm 17 detachable from the eyeglass body 2.

That is, the light amount stop device 17 is formed of a large-sized plate similar to the smooth lens central portion 5a, and has a through hole 17a formed in the central portion thereof and three peripheral portions. Are provided with five locking holes 17b fitted in the projections 5d, respectively, arranged in a cross shape. A set of three locking holes 17b located at the center of each of the three crosses are arranged in a positional relationship corresponding to the three projections 5d of the lens portion 5, respectively. This point is the same for the locking holes 17b of each set arranged on the upper, lower, left and right sides of the cross.

Therefore, in the case of the present embodiment, the light amount aperture 17
Are provided with five sets of locking holes 17b, so that the position of the light amount aperture 17 is shifted up, down, left and right by using the five sets of locking holes 17b so that the through hole 17a is located within the range of the lens central portion 5a. In this case, it can be arranged at an optimum place according to the user's request.

<Embodiment 9> In this embodiment, only the main part is shown in FIG. 25, and minute irregularities 5b are formed in the peripheral portion on the front surface of the lens portion 5 to transmit light in the peripheral portion. The feature is that the ratio is lower than that of the lens central portion 5a having a smooth surface. In this embodiment, the lens central portion 5
The minute unevenness 5b located above the position a is formed by a lateral groove having a saw-tooth cross section in which an upward horizontal surface and a downward slope are alternately arranged vertically.

Therefore, as shown by the symbol a, the light incident on the slope of the minute unevenness 5b from the front is refracted upward, and as shown by the symbol b, The incident light is totally reflected and easily travels upward, and the effect of reducing the amount of light entering the eye is enhanced. If the lower minute unevenness 5b on the lower side of the lens central portion 5a is formed by a transverse groove having a sawtooth-shaped cross section opposite to the upper minute unevenness 5b, the light incident on the minute unevenness 5b is lowered. And the amount of light entering the eye can be reduced.

<Embodiment 10> In this embodiment, only the main part is shown in FIG. 26, and the eyeglass body 2 of the light amount adjusting eyeglasses has an example in which a lens frame 18 separate from the lens 5 is provided. . The lens 5 is composed of a plastic lens (or a colored transparent lens without a mirror coat) having a mirror coat (not shown) forming a semi-transparent mirror on the front surface, and a rear surface similar to that of the previous embodiment. A transmittance adjusting plate 7 with a through hole is attached. Lens frame 18 for fitting the lens 5 and the transmittance adjusting plate 7
Has an awning 18a protruding rearward at the upper edge thereof.

Therefore, in the case of this embodiment, similarly to the previous embodiment, the light transmittance is high at the center of the lens and low at the periphery of the lens, and strong sunlight from above is blocked by the sunshade 18a. Can be blocked.

<Eleventh Embodiment> This embodiment is a modification of the tenth embodiment and is shown in FIG.
Is provided with a lens receiver 18b rising from the lower edge thereof, and the second lens 1 for myopia or the like is provided on the lens receiver 18b.
2 is fitted.

Incidentally, the light amount stop device described in the fourth embodiment may be fitted into the lens receiver 18b.

<Embodiment 12> This embodiment is shown in FIG. 28, in which a lens portion is provided with an eave and the light transmittance of a portion above the center of the lens is reduced. Is lower than the light transmittance.

That is, the light amount adjusting glasses include the eyeglass body 2, the vines 3 and 3, and the detachable light amount adjusting device 19. The eyeglass body 2 has a lens portion 5 and a lens frame portion 6 integrally formed of plastic similarly to the first embodiment, and the lens portion 5 is colored and transparent (a so-called colored lens). Then, projections 6 are provided at a plurality of locations on the upper surface of the lens frame portion 6.
c is provided. The vine 3 is the same as that of the first embodiment.

The light amount adjuster 19 includes a cover 19a for covering the upper part of the lens portion 5 from the front side, an eave 19b protruding forward from a lower edge of the cover 19a, and a rear of the upper edge of the cover 19a. An engagement hole that fits into the projection 6c of the lens frame 6 is formed at the base of the sunshade 19c. The light amount adjuster 19 is made of plastic, and its upper surface or front surface is covered with a mirror coat (not shown) forming a semi-transparent mirror.

Therefore, in the case of the present embodiment, since the upper portion of the lens portion 5 is formed as a semi-transparent mirror by the cover portion 19a of the light amount adjuster 19, the light transmittance is lower than that of the lower portion of the lens portion 5. . Further, since the eaves portion 19b projects forward from the upper edge of the lower portion where the light transmittance of the lens portion 5 is relatively high, it is possible to prevent a large amount of light from entering the lower portion from above. Further, the sunshade portion 1 is located above the upper edge of the lens frame portion 6.
Since 9c protrudes rearward, light is prevented from entering the eye from between the lens frame 6 and the forehead. <Embodiment 13> This embodiment is shown in FIG. 29 and relates to light amount adjusting glasses provided with eaves on a lens portion.

That is, the light-amount adjusting glasses include the eyeglass body 2, the vines 3, 3, and the detachable light-amount adjusting device 23. As in the twelfth embodiment, the eyeglass body 2 has a lens portion 5 and a lens frame portion 6 integrally formed of plastic, and the lens portion 5 is colored and transparent. And the lens unit 5
The protrusion 5e is provided on both sides of the upper part of the front surface of the. Vine 3
Is the same as that of the first embodiment.

The light amount adjuster 23 is formed by integrally forming a cover plate 24 mounted on the front surface of the lens unit 5 and an eave 25 provided on the front surface of the cover plate 24 with plastic.
Through holes 24a, 24a are formed in left and right portions of the cover plate 24. The eaves 25 include upper eaves 25a provided in series in the lateral direction above the left and right through-holes 24a, 24a, and lower elongates the left and right through-holes 24a, 24a so as to be continuous with both ends of the upper eaves 25a. Lower eaves 25b, 25b surrounding from below
And The above-mentioned protrusions 5 are formed at the upper left and right corners of the cover plate 24.
e is formed with an engagement hole to be fitted. The front surface of the cover plate 24 and the outer peripheral surface of the eave 25 are covered with a mirror coat (not shown) forming a semi-transparent mirror.

Therefore, in the case of the present embodiment, the portion of the lens portion 5 covered by the cover plate 24 has a low light transmittance, but the portion of the through hole 24a of the cover plate 24, that is, the lens central portion is higher than the surrounding portion. Light transmittance is high. Also,
The lower eaves 25b prevent light from entering the through-holes 24a from above by the upper eaves 25a, and prevent light from entering the through-holes 24a from the side and light from the road surface or the like from entering the through-holes 24a by the lower eaves 25b. Hindered.

<Embodiment 14> This embodiment is a modification of the embodiment 3 and is shown in FIG. 30. The portion where the fine unevenness 5b on the upper side of the lens portion 5 is formed extends rearward. It is characterized in that the sunshade 5h is formed, and that the side portion of the portion where the minute unevenness 5b is formed wraps around to form the side cover 5i.

The front surface and the upper surface (the upper surface of the sunshade 5h) of the lens unit 5 are covered with a mirror coat (not shown) forming a semi-transparent mirror. On the rear side of the smooth lens central portion 5a having a high light transmittance, an auxiliary tool 26 such as the second lens or the light amount stop tool described in the above several embodiments is provided.
Can be attached.

Therefore, in the case of the present embodiment, the sunshade 5h and the side cover 5i integrated with the lens portion 5
The amount of light entering the eye can be limited.

<Embodiment 15> This embodiment is shown in FIG. 31, in which a cylindrical portion 5f protruding forward is formed at the center of the lens portion 5 of the eyeglass body 2, and the lens portion 5 is formed.
The sunshade 5h projects rearward from the upper edge. And
On the rear surface of the lens portion 5, only the distal end surface of the cylindrical portion 5f is formed smoothly, and the other portions are formed with minute irregularities 5g so as to diffusely reflect light.

Therefore, the tip end surface of the cylindrical portion 5f at the center of the lens has a high light transmittance, but the surrounding portion has a low light transmittance. Therefore, not only the amount of incident light is reduced due to the minute unevenness 5g, but also the person sees the object only from the hole of the cylindrical portion 5f, and the field of view becomes considerably narrower than that of a flat lens, resulting in cataract. The diffuse reflection of light around the crystalline lens of the eye is extremely reduced,
Things become easier to see.

<Embodiment 16> This embodiment is shown in FIG. 32. In the case of Embodiment 15, the cylindrical portion 5f of the lens portion 5 is used.
The front end of the cylindrical portion 5f is closed, and the rear surface thereof is formed smoothly. On the other hand, in the present embodiment, the base end of the cylindrical portion 5f is closed, and the rear surface thereof is formed smoothly. The other components are the same as those of the fifteenth embodiment. Therefore, in the case of this embodiment, the same operation and effect as those of the fifteenth embodiment can be obtained.

<Other Embodiments> In each of the above embodiments, the central portion of the lens having high light transmittance can be formed as a convex lens for far vision or a concave lens for near vision. In that case, the second lens is unnecessary. In some cases, a mirror coat is not provided on the front surface of the lens unit.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of eyeglasses according to a first embodiment.

FIG. 2 is a perspective view showing a part of the glasses according to the first embodiment.

FIG. 3 is a sectional view of a lens portion according to the first embodiment.

FIG. 4 is a sectional view showing a part of the glasses according to the first embodiment;

FIG. 5 is a perspective view showing a modification of the first embodiment.

FIG. 6 is a perspective view showing a part of the glasses according to the second embodiment.

FIG. 7 is a cross-sectional view illustrating a lens unit of the spectacles according to the third embodiment.

FIG. 8 is a perspective view showing a part of eyeglasses and a light amount adjusting device according to a fourth embodiment.

FIG. 9 is a rear view showing a part of the eyeglass body of the embodiment 5-1.

FIG. 10 is a rear view showing a state where the second lens is mounted on the eyeglass body of the embodiment 5-1.

FIG. 11 is a sectional view taken along line AA of FIG. 10;

FIG. 12 is a rear view showing a part of the glasses according to the embodiment 5-2.

FIG. 13 is a sectional view taken along line CC of FIG. 12;

FIG. 14 is a sectional view showing a part of the eyeglasses according to Embodiment 5-3.

FIG. 15 is a rear view showing a part of the glasses according to the embodiment 5-4.

FIG. 16 is a sectional view taken along line DD of FIG. 15;

FIG. 17 is a sectional view showing a part of the glasses according to Embodiment 5-5.

FIG. 18 is a rear view showing a state in which a light amount stop device is attached to the eyeglass body of the sixth embodiment.

FIG. 19 is a sectional view taken along line BB of FIG. 18;

FIG. 20 is a perspective view showing another example of the light amount stop device.

FIG. 21 is a perspective view showing a part of eyeglasses and a light amount stop device according to a seventh embodiment.

FIG. 22 is an exploded perspective view of a light amount stop device according to a seventh embodiment.

FIG. 23 is a perspective view showing a second lens and an aperture cover.

FIG. 24 is a perspective view showing a combination of light amount adjusting glasses and a light amount stop device according to the eighth embodiment.

FIG. 25 is a sectional view showing a lens portion of the eyeglasses according to the ninth embodiment.

FIG. 26 is a sectional view of a lens portion of the spectacles according to the tenth embodiment.

FIG. 27 is a sectional view of a lens portion of the spectacles according to the eleventh embodiment.

FIG. 28 is a perspective view showing the eyeglasses of the twelfth embodiment.

FIG. 29 is a perspective view showing the eyeglasses of Embodiment 13;

FIG. 30 is a perspective view showing the eyeglasses of the fourteenth embodiment in a partial cross section.

FIG. 31 is a perspective view showing the eyeglasses of the fifteenth embodiment in a partial cross section.

FIG. 32 is a perspective view showing the eyeglasses of the sixteenth embodiment in a partial cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light amount adjustment glasses 2 Glasses main body 3 Vine 3a Vent 4 Sunshade 4a Engagement recess 4b Vent 5 Lens part or lens 5a Lens central part 5b Micro unevenness 5c Latch 5d Projection 5e Projection 5f Cylindrical part 5g Microscopic unevenness 5h Sunshade 5i Side cover 6 Lens frame or lens frame 6a Hook 6b Nose hook 6c Projection 6A Projection edge 7 Transmittance adjustment plate (light quantity adjustment tool) 7a Rib 7b Projection 7c Rib 7A Light quantity adjustment tool 8 Through hole 9 Mirror coat 10 Stopper DESCRIPTION OF SYMBOLS 11 Lens support 12 2nd lens 13 Light intensity stop 13A Light intensity stop 14 Metal frame 14a Engagement part 14A Frame member 15 Aperture cover 15a Through hole 15A Aperture cover 16 Light intensity stop 17 Light intensity stop 17a Through hole 17b Engagement hole 18 Lens frame 18a Sunshade 18b Lens receiver 19 Light intensity adjuster 19a Cover 19b Eave part 19c Sunshade part 20 Light amount aperture cover 23 Light amount adjustment tool 24 Cover plate 24a Through hole 25 Eave 25a Upper eave part 25b Lower eave part 26 Auxiliary equipment

Claims (11)

[Claims] 1. A light amount adjusting spectacle comprising a low transmittance portion having a lower light transmittance at a peripheral portion of a lens than a central portion of the lens. 2. A detachable light amount adjuster mounted on a rear surface of a lens of spectacles, wherein the adjuster is formed in a thin plate shape having substantially the same outer shape as the lens.
An eye light amount adjuster having a hole in a central portion for narrowing a range through which light of the lens is transmitted. 3. A detachable light amount adjuster to be attached to spectacles having a lens frame having a protruding edge protruding rearward from a peripheral edge of the lens, wherein the light amount adjuster is a thin plate having an outer shape substantially the same shape as the lens. The lens frame has a hole at the center thereof for narrowing a range through which the light of the lens transmits, and the lens frame is attached to the lens frame from the rear surface side so that the peripheral edge abuts on the inner surface of the protruding edge of the lens frame. An eye light amount adjuster to be fitted. 4. The light amount adjusting glasses according to claim 1, further comprising: a mirror coat that forms a semi-transparent mirror that transmits part of light and reflects part of the light over the entire front surface of the transparent lens. Light amount adjustment, characterized in that at least a part of a peripheral portion of a rear surface of the lens is formed with minute irregularities for irregularly reflecting light so that the peripheral portion has a lower light transmittance than the central portion of the lens. glasses. 5. The light amount adjusting glasses according to claim 1, wherein a mirror coat is formed over the entire front surface of the transparent lens to form a semi-transparent mirror that transmits part of light and reflects part of the light. Light amount adjusting glasses, wherein a transmittance adjusting plate is attached to a rear surface of the lens so as to lower the transmittance of light of at least a part of the peripheral portion of the lens than the light transmittance of the central portion of the lens. 6. An upper edge of the light amount adjusting glasses according to claim 1, which projects rearward from the upper edge and abuts on or comes close to a forehead of a person to enter a light amount between the lens and the eye from above. Light amount adjusting glasses provided with a sunshade for reduction. 7. The light amount adjusting glasses according to claim 1, further comprising a detachable light amount stop device attached to a rear surface of the lens and configured to narrow a range of a portion having a high light transmittance at a central portion of the lens. Characteristic light adjustment glasses. 8. A first lens having a light transmittance at a peripheral portion of the lens lower than a central portion of the lens, a vine connected to the first lens, and supported by a peripheral portion or a lens frame of the first lens. And a detachable second lens for adjusting visual acuity, which is disposed so as to overlap a central portion of the first lens. 9. The light amount adjusting glasses according to claim 8, further comprising a hole having a diameter smaller than that of the second lens, wherein the second lens is arranged at a central portion of the second lens. And a diaphragm cover that is supported by the lens peripheral portion or the lens frame of the first lens together with the second lens and narrows the light transmission range of the second lens to the size of the hole. Adjustable light intensity glasses. 10. A lens having a light transmittance at a peripheral portion of the lens lower than that of the central portion of the lens, a vine connected to the lens, and a central portion of the lens supported by the peripheral portion of the lens or the lens frame. A detachable light-amount aperture device disposed so as to overlap the portion, wherein the light-amount aperture device has a frame member and a hole having a smaller diameter than the lens central portion, and the hole is disposed at a central portion of the frame member. Light amount adjusting glasses, comprising: 11. Light amount adjusting glasses having an eaves projecting forward from an upper part of a lens portion.