JPH07255770A - Sight assisting means for cataract and combination of this sight assisting means for cataract and light quantity adjusting means - Google Patents

Abstract

PURPOSE:To provide a sight assisting means for the cataract which enables a patient to relatively distinctly view objects in spite of progression of the cataract to some extent. CONSTITUTION:This sight assisting means 1 for the cataract is composed of visual field regulators 2 which have at least one through holes 7 to permit incident of rays on the eyes and serve to converge the visual fields to the incident ranges by these through holes 7 and holding means 3 for holding these visual field regulators 2 at the front faces of lenses 12 of spectacles 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visual aid for cataract which assists the visual acuity of a person suffering from cataract, and a visual acuity for cataract for training the eye suffering from the cataract so that the decline of the visual acuity is delayed. The present invention relates to a combination of an auxiliary tool and a light quantity adjusting tool.

[0002]

2. Description of the Related Art Cataract refers to a disease in which a crystalline lens, which is originally transparent, becomes opaque and becomes opaque, resulting in impaired vision such as reduced visual acuity. Generally, turbidity occurs around the lens in the initial stage,
The turbidity often spreads from the peripheral portion toward the center, which makes the object appear hazy, and the haze becomes stronger, and eventually blindness occurs.

On the other hand, eye drops and oral liquids that suppress the progression of turbidity are used by specialists, and when the progress of the symptoms cannot be suppressed and the visual acuity is greatly reduced, the visual acuity is recovered by surgery. .

[0004]

However, there is no known device for supplementing the visual acuity of the above-mentioned cataract. Therefore, when the cataract progresses to a certain extent, it is necessary to live a daily life with the eyesight deteriorated, which hinders reading, watching TV, driving a car, and the like.

Therefore, the present invention provides a visual acuity aid for cataract that allows a person to relatively clearly see an object even before the cataract is operated even if the cataract progresses to some extent. is there.

Another object of the present invention is to provide means for training an eye suffering from the above-mentioned cataract so that the deterioration of the visual acuity is delayed.

[0007]

Means for Solving the Problems and Their Actions The present inventor has examined the symptoms of cataracts to solve the above problems, and as a result, in cataracts, light passes through the opaque area around the lens to reach the fundus. In view of the occurrence of the haze, in order to reach the fundus by narrowing the field of view and passing light mainly through the central part where there is no opacity of the crystalline lens, the haze is reduced, and it is found that the above problems can be solved. The present invention has been completed. Hereinafter, the invention according to each claim for solving the above problems will be specifically described.

<Invention of Claim 1> According to the present invention, there is provided a field-of-view adjuster which has at least one through hole which allows light rays to enter the eye and narrows the field of view to the incident range by the through-hole, and the above-mentioned field of view adjustment. And a holding means for holding the device on the front surface of the lens of the spectacles.

Therefore, according to the present invention, the visual field adjuster can be held in front of the eye by using the glasses, and the visual field is narrowed by the through hole of the visual field adjuster to reduce the amount of light passing through the opaque portion of the crystalline lens. By doing so, it is possible to relatively increase the amount of light that passes through the non-opaque portion and reaches the fundus.

Here, whether the lens of the spectacles is for correcting visual acuity that focuses or diverges light, or does not cause substantial focusing or divergence of light (thickness of uniform thickness). It doesn't matter.

<Invention of Claim 2> According to the present invention, in the visual aid for cataract according to claim 1, the field-of-view adjuster has a cylindrical portion which is open at both ends and projects in front of the spectacle lens. It is characterized in that the cylindrical hole constitutes the through hole.

In the present invention, the visual field is narrowed down to the range that can be seen through the cylindrical hole of the cylindrical portion of the visual field adjuster.

<Invention of Claim 3> The present invention provides the power assisting tool for cataracts according to claim 2, wherein the outer diameter of the tubular portion is 1.5 cm or less, and the spectacles of the tubular portion. The protrusion length from the lens is 2.5 cm or less.

The reason for having such dimensions is as follows. That is, it is unlikely that both eyes will have cataracts at the same time, only one eye will have cataracts, and the other eye will often be normal. In that case, the cataract vision aid will be attached to the spectacle lens of the eye with cataract, but if the outer diameter of the tubular portion is large or the amount of protrusion is large, this visual acuity for cataract The aid will partially obscure the normal visual field of the eye. Therefore, in the present invention, the dimensions of the tubular portion are as described above,
While the visual acuity is assisted by the visual acuity assisting device, the normal visual field of the eye is prevented from being narrowed as much as possible.

<Invention of Claim 4> The present invention provides the visual acuity aid for cataracts according to claim 2 or 3, wherein the visual field adjuster is a base end portion of the tubular portion. Is provided with a shielding flange that extends outward and shields the incidence of light rays on the eye.

In the case of the present invention, the shielding flange prevents light from entering the eye suffering from a cataract from around the cylindrical portion. In this case, light that enters from the periphery of the tube easily reaches the fundus through the opaque portion around the lens, but such light is blocked by the shielding flange, so that the object can be seen more clearly. become.

<Invention of Claim 5> According to the present invention, in the visual acuity aid for cataracts according to claim 4, the projection amount of the shielding flange toward the inner or inner corner side is closer to the outer corner side of the shielding flange. It is characterized by being larger than the overhang amount.

In the present invention, the large amount of projection of the shielding flange toward the inner or inner corner of the eye means that extra light can be reduced from entering the eye having cataract. However, even if the amount of overhang is large in this way, since the flange overhangs along the spectacle lens, the field of view of the other eye is hardly obstructed. Therefore, the visibility of the object is good when the other eye is normal.

The small amount of projection of the shielding flange toward the outer corner of the eye means that extra light enters the eye having the cataract from the outer corner of the eye. However, when we look at the relationship between one eye that uses a vision aid for cataracts and the other eye that does not use it, light that enters only one eye from the side of the eye is normal. Almost never enters the eye. Therefore, when the shielding flange blocks the light which should enter the one eye having the cataract from the side of the outer corner of the eye, the field of view is narrowed as a result. Therefore, in the invention, it is considered that the problem of narrowing the visual field as a whole is a problem rather than the problem caused by extra light entering the eye with cataract from the eye outer side, and The amount of overhang is reduced.

<Invention of Claim 6> In the visual acuity aid for cataract according to claim 5, the length from the center of the tubular portion to the projecting end of the shielding flange toward the outer corner of the eye is the invention. It is characterized by being 1.5 cm or less.

With such a size setting, the action of the invention according to claim 5 can be exerted.

<Invention of Claim 7> The present invention provides the visual acuity aid for cataracts according to any one of claims 4 to 6, wherein the holding means is fixed to the shielding flange. It is a sucker that sticks to.

In the present invention, the visual field adjuster can be attached to and removed from the desired position on the front surface of the spectacle lens by the suction cup.

<Invention of Claim 8> This invention is the visual acuity aid for cataracts according to any one of claims 4 to 6, wherein the holding means is provided on the rear surface of the shielding flange. It is characterized by being an adhesive layer.

Also in the present invention, the visual field adjuster can be mounted at a desired position on the front surface of the spectacle lens.

<Invention of Claim 9> The present invention is the visual acuity aid for cataract according to any one of claims 1 to 8, which is mounted on one lens of the eyeglass, and the other lens of the eyeglass. It is a combination with a light amount adjuster that is attached to the eye and reduces the amount of light that enters the eye through the other lens.

In the case of the present invention, the visual aid for cataract is attached to the spectacle lens of the eye having cataract, and the eye light amount adjusting tool is attached to the spectacle lens of the normal eye. This reduces the amount of light entering the normal eye and makes it difficult to see, so that the eye of the person with cataract is often used for visual recognition of the object, which is a training for visual recognition. As a result, it is possible to expect that the progression of the reduction in visual acuity of the eye suffering from cataract is delayed. That is, since the cataract visual aid is itself narrowing the incident range of light to the eye, if the other eye not using this is normal, the eye wearing the aid is The result could be unused. Therefore, in the invention, the visual acuity assisting device for cataract and the light amount adjusting device are combined so that the eye having cataract can be trained.

<Invention of Claim 10> The present invention is the visual acuity aid for cataract according to any one of claims 1 to 8, which is mounted on one lens of the eyeglass, and the other lens of the eyeglass. A visual acuity aid for cataract according to any one of claims 2 to 8, and a tubular part of the visual acuity aid for cataract attached to the other eyeglass lens.
Reduce the amount of light incident on the eye through the other lens,
This is a combination with a tubular light amount adjusting tool having a colored transparent film attached to one end surface.

In the present invention, the cataract power assist tool attached to one of the eyeglass lenses is dedicated to assisting the visual acuity of the cataracted eye, while the cataract vision assist tool attached to the other eyeglass lens is It can be used for assisting the eyesight of a cataracted eye, and by fitting the light quantity adjusting tool, the quantity of light entering the normal eye through the other lens can be reduced. Like the invention, it can be used for training of eyes suffering from cataract.

In this case, since the colored transparent film of the light quantity adjuster allows only light of a specific wavelength to pass through, the amount of light entering the eye is reduced. However, depending on the type of color of the colored transparent film used, the amount of light decreases. You can change the amount.

[0031]

According to the first aspect of the present invention, there is provided a visual field adjuster which has at least one through hole which allows light rays to enter the eye, and which limits the visual field to the incident range of the through hole. Since the field of view adjuster is provided on the front surface of the lens of the spectacles, the field of view adjuster is held in front of the eye by using the spectacles, and the field of view is narrowed to reach the fundus through the opaque part of the crystalline lens. The amount of light can be reduced and so-called haze can be reduced so that objects can be seen relatively clearly.

According to the second aspect of the present invention, since the visual field adjuster has the tubular portion with both ends open, and the tubular hole constitutes the through hole, the visual field is within a range visible through the tubular hole. Is narrowed down and the effect of the invention according to claim 1 is obtained.

According to the invention of claim 3, the outer diameter of the tubular portion is 1.5 cm or less, and the protruding length of the tubular portion from the spectacle lens is 2.5 cm or less. While the visual acuity is assisted by the adjusting tool, it is possible to prevent the visual field of the normal eye from being narrowed.

According to the fourth aspect of the present invention, since the base end portion of the cylindrical portion is provided with the shield flange that extends outward and shields the incidence of light rays on the eye, the fundus passes through the opaque area around the crystalline lens. You can reduce the amount of light that reaches to, and you can see things more clearly.

According to the invention of claim 5, since the amount of projection of the shielding flange toward the inner or inner corner of the eye is larger than the amount of protrusion of the shielding flange toward the outer corner of the eye, the field of view is not unnecessarily narrowed. The effects of the invention according to claim 4 can be obtained.

According to the invention of claim 6, the length from the center of the cylindrical portion to the projecting end of the shielding flange toward the outer corner of the eye is 1.5 cm or less. Therefore, the effect of the invention of claim 5 Can be surely obtained.

According to the invention of claim 7, since the holding means is a suction cup which is fixed to the shielding flange and adheres to the lens of the spectacles, it is an optimum place according to the occasion such as reading or driving a car. By arranging the visual field adjuster at the position, the effect of the invention according to claim 1 can be obtained.

According to the invention of claim 8, since the holding means is an adhesive layer provided on the rear surface of the shielding flange, the effect of the invention of claim 1 is simple and does not increase the cost. Obtainable.

According to the invention of claim 9, a cataract vision aid is attached to the spectacle lens of the eye suffering from cataract, and a light amount adjusting tool is attached to the spectacle lens of the normal eye. This makes it possible to train the visual acuity of a cataracted eye.

According to the tenth aspect of the invention, a cataract in which a vision aid for cataract is attached to a spectacle lens of an eye suffering from cataract, and a light amount adjusting tool is fitted to the spectacle lens of a normal eye is attached. By installing the visual acuity assisting device, the same effect as that of the invention according to claim 9 can be obtained, and
The training effect can be enhanced by changing the color of the colored transparent film used to obtain a desired amount of light.

[0041]

Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1> In FIG. 1, 1 is a pair of glasses 11.
It is a visual aid for cataract that is attached to the lens 12, and includes a visual field adjuster 2 and suction cups 3 and 3 as holding means. As shown in FIG. 2, the field-of-view adjuster 2 includes a cylindrical cylindrical portion 4 made of plastic with both ends open, a shielding flange 5 protruding outside the base end of the cylindrical portion 4, and a shielding flange 5 of the shielding flange 5. Cushion layer 6 made of sponge on the back
And are equipped with.

The cylindrical portion 4 has an outer diameter of about 1 cm, an inner diameter of about 8 mm, and a protruding length from the spectacle lens 12 of 2.
The diameter is about 0 cm, and the cylindrical hole constitutes the through hole 7 that allows light rays to enter the eye. In addition, a female screw 4a for fitting a light amount adjusting tool 17, which will be described later, on the inner surface of the distal end portion of the tubular portion 4.
Are formed.

The shielding flange 5 shields the incidence of light rays on the eye, and the amount of protrusion from the cylindrical portion 4 to the inner or inner corner of the eye is larger than the amount of protrusion to the outer corner of the eye. . In this case, the length from the center of the tubular portion 4 to the overhanging end of the shielding flange 5 toward the outer corner of the eye is about 1.5 cm, and from the center of the tubular portion 4 to the overhanging end of the shielding flange 5 toward the inner canal side. The length is about 2.5 cm.

The suction cups 3 are for holding the field-of-view adjuster 2 on the spectacle lens 12, and are fixed to the upper and lower portions of the shielding flange 5 one by one and project to the back. . The suction cup 3 has an elliptical shape and is provided with two upwardly protruding projections 3a, 3a on its back. The projections 3a are embedded in the cushion layer 6 of the shielding flange 5 and fixed to the shielding flange 5. ing.

Therefore, the field of view adjuster 2 is controlled by the suction cup 3 described above.
Can be arranged and fixed on the front surface of the spectacle lens 12 at an optimum position for use.

However, according to the visual acuity aid 1 for cataract, when viewed in a plan view, the light in the range shown by the slanting line in the lower right of FIG. 3 does not enter one eye, and the eye mainly adjusts the visual field. The light that has passed through the through hole 7 of the container 2 comes into the device. Therefore, the light mainly passes through the central part of the lens with less opacity to form an image on the retina of the fundus, and the obtained image becomes relatively clear.

If the cataract visual acuity aid 1 is not attached to the other spectacle lens 12, the light in the range shown by the slanting line on the lower left in FIG. The area in which the above-mentioned downward sloping line and the downward sloping line overlap cannot overlap. However, the range of this blind spot is narrow because the amount of projection of the shielding flange 5 toward the outer corner of the eye is small as described above, and there is no hindrance to the visibility of surrounding objects.

The light quantity adjusting tool 17 has a cylindrical shape with a male screw 17a screwed into the female screw 4a of the cylindrical portion 4 is formed on the outer peripheral surface thereof, as its structure is specifically shown in FIG. In addition, the flange 17b is provided at one end, and the colored transparent film 18 is attached to the end surface of the flange 17b.

Therefore, when the spectacle lens 12 is fitted with the light quantity adjusting tool 17 to which the colored transparent film 18 is attached and which is fitted to the visual acuity aid 1 for cataract, the amount of light entering the eye through the spectacle lens 12 is reduced. It will be. Therefore, as shown in FIG. 1, the spectacle lens 12 for the eye having cataract is equipped with the visual acuity aid 1 without the light amount adjuster 17, and the spectacle lens 12 for the normal eye has the light amount. If the visual acuity assisting tool 1 fitted with the adjusting tool 17 is worn, a normal eye is difficult to see because the amount of light is limited by the light quantity adjusting tool 17, so that it may be difficult for a normal eye to have an eye with a cataract. The nerve is concentrated and the visual acuity can be trained by the visual acuity assisting tool 1.

When the light amount adjusting tool 17 is fitted to the visual acuity assisting tool 1 without attaching the colored transparent film 18, the diameter of the through hole 7 can be reduced by the light amount adjusting tool 17. . Therefore, in this way, the field of view can be narrowed to that extent, so that the object can be clearly seen even when the cataract progresses and the number of opaque parts of the crystalline lens increases.

It should be noted that, as shown in FIG.
It may be provided at four locations (or three locations) around the.

<Embodiment 2> The visual acuity aid 19 for cataracts shown in FIGS. 6 and 7 differs from that of Embodiment 1 in that an adhesive layer 20 is used as a holding means. That is, the adhesive layer 20 is provided on the cushion layer 6, and the vision aid 19 peels off the release paper 21 that protects the adhesive surface of the adhesive layer 20 and attaches it to the spectacle lens 12.

Further, in FIG. 6, reference numeral 22 denotes an elastic field stop made of rubber or the like, which is formed in a cylindrical shape having a slit 22a as shown in FIG. When using, the field diaphragm 22 is set to the slit 2
As a state in which 2a is contracted so as to be narrow, a visual acuity assisting device 19
It is inserted into the cylindrical portion 4 and is held on the inner peripheral surface of the cylindrical portion 4 by elastic repulsive force. As a result, the diameter of the through hole 7 can be reduced. In addition, if several field diaphragms having different diameters are prepared, the diameter of the through hole 7 can be reduced according to the degree of progress of cataract.

<Third Embodiment> FIG. 9 shows a visual acuity aid 23 for cataract of the present embodiment. This sight assist tool 23 has a cylindrical portion 4.
The swirl paper 24 is housed inside. A part of the outer peripheral end of the spiral paper 24 is fixed to the tubular portion 4.

Therefore, the diameter of the through hole 7 is large when the spiral paper 24 is housed in the tubular portion 4, but when this is pulled out forward as shown by the chain line in FIG. The entire cylinder becomes longer. Therefore, the field of view can be effectively narrowed by reducing the diameter of the through hole 7 and increasing the overall length of the cylinder.

<Embodiment 4> FIG. 10 shows a visual acuity aid 25 for cataract of this embodiment. The sight aid 25 is made of paper, includes a tubular portion 26 and a flange 27, and the adhesive layer 20 protected by the release paper 21 is provided on the back surface of the flange 27.
Is provided. In use, the release paper 21 is peeled off and the visual acuity aid 25 is adhered to the spectacle lens by the adhesive layer 20.

<Embodiment 5> FIG. 11 shows a visual aid 28 for cataract of this embodiment. This visual acuity assisting device 28 has a front surface formed on an inclined surface 29a, and has an axial through hole 7 at an eccentric position.
A cylindrical visual field adjuster 29 formed of a sponge,
An adhesive layer 20 provided on the back surface of the visual field adjuster 29 with a cushion layer 30 interposed therebetween. The inclined surface 29a
Is inclined downward toward the inner canthus side of the visual field adjuster 29 so that the inner canal side becomes thin, and the through hole 7 is eccentric to the outer canthus side.

Therefore, when the visual acuity assisting device 28 is attached to the spectacle lens of one eye, the front surface is inclined as described above, so that the field of view of the other eye is less obstructed, and
Since the through hole 7 is eccentric, the same effect as that of the first embodiment (see FIG. 3) can be easily obtained.

<Embodiment 6> This embodiment is shown in FIGS. 12 and 13, and the means for holding the cataract visual acuity aid 31 is different from the previous embodiment. That is, the holding means of this example is the glasses 32
Of the ferromagnetic metal wire (iron wire) 34 stretched over the entire surface of the lens 33 of FIG. It is composed of a magnet 35 held on the front surface of 33.

The metal wire 34, as shown in FIG.
It is stretched vertically and horizontally in a grid pattern. These metal wires 34 are colored and painted in a flesh color. The magnet 35 is formed of a rubber magnet, and is fixed to the back surface of the shielding flange 5 of the visual field adjuster 2.

Therefore, in the case of this example, no matter where the visual field adjuster 2 is arranged on the spectacle lens 33, the attractive force of the magnet 34 and the metal wire 35 causes the visual field adjuster 2 to move. It is held on the front surface of 33.

<Embodiment 7> In FIG. 14, reference numeral 36 denotes a visual aid for cataract, which comprises a visual field adjuster 2 and cord members 37, 37 as holding means. As shown in FIGS. 15 and 16, the field-of-view adjuster 2 includes a cylindrical tubular portion 4 having both ends open, a shield flange 5 extending outside the base end of the tubular portion 4, and the shield flange 5. And a cushion layer 6 provided on the back surface of the.

The cylindrical hole of the cylindrical portion 4 constitutes a through hole 7 which allows the light ray to enter the eye. On the left and right arc portions of the shielding flange 5, the cord member 37 is provided with a circumferential groove 5a formed on the outer peripheral surface of the flange and a cover 5b covering the groove.
A through hole is formed to pass through in the circumferential direction. The cushion layer 6 is formed of a felt material or the like, and when the cataract vision aid 36 is attached to the eyeglass 11, the cushion layer 6 is applied to the front surface of the lens 12 of the eyeglass 11 to attach the lens 12 to the eyeglass 11. Protect.

The cord member 37 is formed of a stretchable cord such as rubber and is passed through the through hole of the visual field adjuster 2 to engage with the visual field adjuster 2. String member 3
Both ends of 7 are protruded from the through hole, and a hooking portion 37a that hooks on the edge 13 of the eyeglass 11 is provided at the end thereof. That is, the cord members 37, 37 passed through the left and right through holes of the field-of-view adjuster 2 have the spectacles 1 as shown in FIG.
It is hooked on the left and right parts of the upper part and the left and right parts of the lower part of the edge 1, and is stretched on the front surface of the spectacle lens 12.

Therefore, when the cord member 37 is passed through the through hole of the visual field adjuster 2 and stretched as described above, the visual field adjustment is performed by shifting the engagement position between the visual field adjuster 2 and the cord member 37. The device 2 can be slid on the front surface of the spectacle lens 12 to a position suitable for use. Further, this sliding movement is allowed by the cord member 37 expanding and contracting.

However, according to the visual acuity aid 36 for cataract, the visual field is in the range where it passes through the through hole 7 of the visual field adjuster 2 and reaches the fundus of the eyeball 15 (see the chain double-dashed line in FIG. 16). Is narrowed down to. Therefore, for example, as shown by the alternate long and short dash line in FIG.
An image is formed on the retina 16 of the fundus mainly through the central portion having a small number of 4a, and the obtained image becomes relatively clear.

Although light enters the eyes from above and below the visual aid for cataracts 36, the light entering there does not affect the visual recognition of the object in front.

FIG. 17 shows a modification of this example.
As the visual field adjuster 2, the same one as that of the first embodiment is used, and one string member 37 is wrapped around the arcuate portion of the visual field adjuster 2 on the inner canthus side so that both ends are hooked on the edges of the eyeglass 11 on the outer canth side. The other string member 37 is wound around the arcuate portion of the visual field adjuster 2 on the outer corner of the eye and hooked at both ends on the edge of the eyeglass 11 on the inner canthal side.

<Embodiment 8> This embodiment is shown in FIG. 18, and is characterized by the holding means of the visual aid for cataract 38. That is, the holding means is a hook member 39 formed of a spring steel wire. The lower end is connected to the shielding flange 5 of the field-of-view adjuster 2, and the upper end is provided with the edge 13 of the spectacles 11.
It is provided with a hook portion 39a that is hooked on the.

Therefore, by hooking the hook member 39 on the edge of the spectacles 11, the cataract vision aid 38 can be easily held in front of the eye, and the spectacles 1
It can be easily removed from 1.

<Embodiment 9> This embodiment is shown in FIGS. 19 and 20, and the visual field adjuster 42 of the visual acuity assisting device 41 for cataract is used.
And both the holding means. That is, the visual field adjuster 42 is composed of a plate having a plurality of small holes formed as the through holes 47. The plate-shaped visual field adjuster 42 is fitted on a circular ring-shaped magnet 43 formed by a rubber magnet.

The magnet 43 constitutes the holding means of this example. Other components of this holding means are a transparent plate 45 having a ferromagnetic metal wire (iron wire colored and painted in flesh color) 44 all over the surface, and the transparent plate 4 described above.
5, a hook member 46 that is hooked on the edge 53 of the spectacles 51 and holds the transparent plate 45 on the front surface of the spectacle lens 52.
And. The tension of the metal wire 44 on the transparent plate 45 is the same as that of the spectacle lens 33 of the third embodiment. The hook member 46 is fixed to the upper portion of the edge 45a of the transparent plate 45,
A hook portion 46 a that hooks on the edge 53 of the eyeglasses 51 is provided.

Therefore, when using the vision aid 41, the transparent plate 45 is held on the front surface of the spectacle lens 52 by the hook member 46. Then, as in the case of the third embodiment, the magnet 43 and the transparent plate 45 of the visual field adjuster 42.
The visual field adjuster 42 can be placed in a desired place in front of the eye by utilizing the suction force with the metal wire 44 of the. When not in use, the visual field adjuster 42 may be removed from the glasses 51 together with the transparent plate 45.

In the case of this example, however, the field of view is narrowed down to the range that can be seen through the through hole 47, which is a small hole of the plate-shaped field of view adjuster 42, and a relatively clear image is obtained as in the first embodiment. Obtainable.

<Embodiment 10> As shown in FIG. 21, a visual acuity aid 61 for cataract of this example has three vertically elongated through holes 62 arranged side by side on a plate formed to have a diameter substantially the same as that of a lens of spectacles. The visual field adjuster 63 that is opened, and the visual field adjuster 63
And a hook member (holding means) 64 that is provided above and below and is hooked on the upper and lower edges of the glasses.

In use, the visual field adjuster 63 is held on the front surface of the spectacle lens by the hook member 64. The field of view is narrowed down to the light incident range of the three through holes 62.
Since each through hole 62 is vertically long, it becomes convenient when the user moves the viewpoint up and down to view an object (for example, when reading a newspaper).

Although the through hole 62 is a through hole, it may be a transparent body (glass or plastic) fitted therein. Further, the visual field adjuster 63 may be formed by coloring the periphery of the transparent plate, leaving the through hole 62. The above points are the same in Examples 11 to 14 described below.

<Embodiment 11> As shown in FIG. 22, a cataract visual acuity assisting tool of this embodiment is provided with three laterally long through holes 66 arranged vertically on a plate formed to have a diameter substantially the same as that of a lens of spectacles. And a hook member (not shown) similar to that in the tenth embodiment.

The method of use is the same as that of the tenth embodiment, but in the case of this example, since each through-hole 66 is horizontally long, when moving the viewpoint left and right to view an object (for example, driving a car). It becomes convenient.

<Embodiment 12> As shown in FIG. 23, the visual acuity aid for cataract of the present embodiment has a cross-shaped through hole 72 formed in a plate formed to have a diameter substantially the same as the lens of the eyeglass. The field-of-view adjuster 73 and a hook member (not shown) similar to the fifth embodiment are used.

The method of use is the same as that of the tenth embodiment, but in the case of this embodiment, it becomes convenient when the viewpoint is moved vertically and horizontally to view an object.

In this example, the single through hole 72 is provided, but the single through hole may be circular.

<Embodiment 13> As shown in FIG. 24, the cataract visual acuity assisting tool of the present example is formed by forming a letter-shaped through hole 76 in a plate formed to have a diameter substantially the same as the lens of the eyeglass. The field-of-view adjuster 77 and a hook member (not shown) similar to the fifth embodiment are used.

The method of use is the same as that of the tenth embodiment, but in the case of this example, it becomes convenient when the viewpoint is moved vertically and horizontally to view an object.

<Embodiment 14> As shown in FIG. 25, the visual aid for cataract of this embodiment has an inverted U-shaped through hole 82 formed in a plate formed to have substantially the same diameter as the lens of the eyeglass. And a hook member (not shown) similar to that of the fifth embodiment.

The method of use is the same as that of the tenth embodiment, but this embodiment is also convenient for viewing an object by moving the viewpoint vertically and horizontally.

[Brief description of drawings]

FIG. 1 is a front view showing a vision aid for cataract and eyeglasses according to a first embodiment.

FIG. 2 is a cross-sectional view showing a vision aid for cataract and a spectacle lens of the same example.

FIG. 3 is a sectional view showing a field of view in the same example.

FIG. 4 is a cross-sectional view showing a state in which a light amount adjuster is attached to the visual acuity aid for cataract of the same example.

FIG. 5 is a front view of a vision aid for cataract showing a modified example of the suction cup of the same example.

FIG. 6 is a cross-sectional view showing a vision aid for cataract and a spectacle lens of Example 2.

FIG. 7 is a perspective view showing the visual aid for cataract of the same example.

FIG. 8 is a perspective view showing a field stop of the same example.

FIG. 9 is a perspective view showing a vision aid for cataract of Example 3;

FIG. 10 is a perspective view showing a vision assistance device for cataract of Example 4.

FIG. 11 is a perspective view showing a vision aid for cataract of Example 5.

FIG. 12 is a cross-sectional view showing a vision aid for cataract and eyeglasses of Example 6.

FIG. 13 is a front view showing the glasses of the same example.

FIG. 14 is a front view showing a vision assistance tool for cataract and eyeglasses of Example 7.

FIG. 15 is a perspective view showing the visual aid for cataract of the same example.

FIG. 16 is a cross-sectional view showing a vision assistance device for cataract, spectacles, and an eyeball of the same example.

FIG. 17 is a front view showing a modified example of the same example.

FIG. 18 is a cross-sectional view showing a vision assistance tool for cataract and eyeglasses of Example 8.

FIG. 19 is a cross-sectional view showing a visual aid for cataract and eyeglasses of Example 9.

FIG. 20 is a perspective view showing a visual field adjuster of the same example.

FIG. 21 is a front view showing a visual aid for cataract of Example 10.

22 is a front view showing the visual field adjuster of Example 11. FIG.

FIG. 23 is a front view showing the visual field adjuster of the twelfth embodiment.

FIG. 24 is a front view showing the visual field adjuster of the thirteenth embodiment.

FIG. 25 is a front view showing the visual field adjuster of the fourteenth embodiment.

[Explanation of symbols]

1,19,23,25 28,31,36,38,41,61 Sight assistance device for cataract 2,42,63,67,73,77,83 Visual field adjuster 3 Sucker 4 Tube part 5 Shielding flange 6 Cushion layer 7, 47, 66, 72 76, 82 Through hole 11, 32, 51 Eyeglasses 12, 33 Lens 13, 53 Edge 15 Eyeball 17 Light intensity adjusting tool 18 Colored transparent film 20 Adhesive layer 21 Release paper

Claims (10)

[Claims] 1. A field-of-view adjuster having at least one through-hole that allows light rays to enter the eye and narrowing the field of view to the incident range of the through-hole, and the field-of-view adjuster is held on the front surface of a lens of spectacles. A visual acuity aid for cataract, comprising: holding means. 2. The visual acuity assisting device for cataracts according to claim 1, wherein the visual field adjuster includes a tubular portion that is open at both ends and projects toward the front of the spectacle lens, and the tubular hole is the above-mentioned. A visual aid for cataract characterized by forming a through hole. 3. The cataract power assisting tool according to claim 2, wherein the tubular portion has an outer diameter of 1.5 cm or less, and a projecting length of the tubular portion from the spectacle lens is 2.5 cm or less. A visual aid for cataracts characterized in that 4. The visual acuity aid for cataracts according to claim 2, wherein the visual field adjuster projects outwardly at the base end portion of the tubular portion so that light rays are incident on the eye. A visual acuity aid for cataracts, comprising a shielding flange for shielding. 5. The cataract visual acuity device according to claim 4, wherein the amount of protrusion of the shielding flange toward the inner or inner corner of the eye is larger than the amount of protrusion of the shielding flange toward the outer corner of the eye. Vision aids. 6. The visual acuity aid for cataracts according to claim 5, wherein the length from the center of the tubular portion to the projecting end of the shielding flange toward the outer corner of the eye is 1.5 cm or less. Visual aids for cataracts. 7. The visual acuity aid for cataracts according to any one of claims 4 to 6, wherein the holding means is a suction cup fixed to the shielding flange and attached to the lens of the spectacles. A vision aid for cataracts. 8. The cataract visual acuity device according to claim 4, wherein the holding means is an adhesive layer provided on a rear surface of the shielding flange. Vision aids. 9. The cataract visual acuity aid according to claim 1, which is attached to one of the lenses of the spectacles, and the other lens of the spectacles which is attached to the other lens of the spectacles. A combination with a light amount adjuster that reduces the amount of light that enters the eye. 10. The visual acuity aid for cataract according to any one of claims 1 to 8, which is attached to one of the lenses of the spectacles, and the other lens of the spectacles. 8
The visual aid for cataracts according to any one of, and is fitted to the tube portion of the visual aid for cataracts attached to the other spectacle lens, the amount of light incident on the eye through the other lens A combination with a tubular light intensity adjuster with a colored transparent film attached to one end.