WO2021112101A1

WO2021112101A1 - Vision correction tool and vision correction method

Info

Publication number: WO2021112101A1
Application number: PCT/JP2020/044749
Authority: WO
Inventors: 吉川　実
Original assignee: 株式会社ミクロ技術研究所
Priority date: 2019-12-02
Filing date: 2020-12-01
Publication date: 2021-06-10
Also published as: JP2023007510A

Abstract

[Problem] To provide a vision correction tool and a vision correction method which are capable of achieving, relatively easily and in a short time, a vision corrected state in which an object can be seen more easily, brightness can be felt, or the like. [Solution] A vision correction tool which comprises: a blinder plate 2 that includes a light blocking part 4 having a pin hole 41 and a liquid crystal shutter part 5 which is placed against the light blocking part 4 in the thickness direction and is formed from liquid crystal capable of switching between a light transmitting state and a transmission limited state, the blinder plate 2 enabling the external environment to be seen through the pin hole 41 in the light transmitting state; and a controller 3 which is connected to the liquid crystal shutter part 5 and periodically switches the liquid crystal shutter part 5 between the light transmitting state and transmission limited state.

Description

Visual acuity correction tool and vision correction method

The present invention relates to a visual acuity correction tool and a visual acuity correction method that can obtain a visual acuity correction state relatively easily and in a short time after use.

The human eye contracts the adjusting muscles such as the ciliary muscle, straight muscle, and oblique muscle depending on the object to deform the crystalline lens and eyeball, thereby focusing on the retina, from near to far. It is designed to be perceptible. However, the human eye suffers from bad eye habits such as gazing at nearby areas such as emails on personal computers, game consoles, mobile phones, and smartphones, overuse of the eyes, and mental and physical stress on the optic nerve and accommodative muscles. It is known that the tension continues and the accommodative muscles, the crystalline lens, or the cornea are distorted, and as a result, a normal image cannot be formed on the retina, causing various symptoms.

On the other hand, it is also known that by training these adjusting muscles and optic nerve, distortion can be removed and visual acuity function can be restored. Various devices and instruments have been conventionally proposed as training means for this purpose.

For example, there is a health eyeglass described in Patent Document 1 as such an instrument. These health spectacles are formed by fitting a plate body formed of a non-transmissive material into a spectacle frame and having a large number of conical small holes formed therein instead of a lens. Glasses with a structure like insurance glasses have been called pinhole glasses in recent years, and when pinhole glasses with such a structure are worn, an image of the outside world is connected to the retina through multiple pinholes, and the distance is long. It is said that it has the same effect as seeing on the eyeballs and stimulates the brain to help activate it. As a result, it is said that by promoting the muscle movement of the eyeball or relaxing the muscle of the eyeball, it is possible to recover from eye fatigue, prevent deterioration of visual acuity, and correct visual acuity.

Jikkenhei 6-50031

Certainly, wearing pinhole glasses makes it easier for people with myopia to focus farther. However, it is said that pinhole glasses are only a device to make it easier to focus in the distance, and they are only temporarily easier to see when worn, and have no effect on vision recovery, vision correction, etc. It has been.

As a result of diligent research, the present inventors have developed a new visual acuity correction device and a visual acuity correction method that can obtain a visual acuity correction state such as making it easier to see a target and feeling brightness after use. .. That is, an object of the present invention is to provide a visual acuity correction device and a visual acuity correction method that can obtain a visual acuity correction state relatively easily and in a short time after use.

In order to achieve the above object, the vision correction tool of the present invention comprises a light-shielding portion having a pinhole and a liquid crystal that is superposed on the light-shielding portion in the thickness direction and can switch between a light transmission state and a transmission restriction state. An eye-shielding plate that has a liquid crystal shutter unit and allows the outside world to be visually recognized from the pinhole in the transmissive state, and is connected to the liquid crystal shutter unit to periodically perform a transmissive state and a transmission limited state of the liquid crystal shutter unit. It is characterized by having a controller that can be switched to.

It is a visual acuity correction method using the visual acuity correction tool, and is characterized in that it is performed by watching a blurred moving image from the pinhole.

It is a visual acuity correction method using the visual acuity correction tool, and is characterized in that it is performed by looking at the outside world from the pinhole while wearing glasses or contacts.

According to the visual acuity corrector of the present invention, the visual acuity corrector comprises a light-shielding portion having a pinhole and a liquid crystal shutter portion made of a liquid crystal that is superposed on the light-shielding portion in the thickness direction and can switch between a light transmission state and a transmission restriction state. The present invention includes an eye-shielding plate that allows the outside world to be visually recognized from the pinhole in the transmission state, and a controller that is connected to the liquid crystal shutter unit and periodically switches between the transmission state and the transmission restriction state of the liquid crystal shutter unit. The eyesight was corrected using this vision correction tool. As a result, it is possible to obtain an effect that the visual acuity correction state can be obtained relatively easily and in a short time.

The schematic perspective view of the visual acuity correction tool which concerns on 1st Embodiment of this invention. The schematic perspective view for demonstrating the structure of the eye-shielding plate. A block diagram for explaining the structure of the controller. The supplementary figure for demonstrating the structure of the visual acuity correction tool which concerns on 2nd Embodiment of this invention. The schematic diagram of the visual acuity correction tool which concerns on 2nd Embodiment of this invention.

Hereinafter, the visual acuity correction tool and the visual acuity correction method according to the embodiment of the present invention will be described with reference to the drawings.

FIG. 1 schematically illustrates a visual acuity correction tool 1 according to the first embodiment of the present invention, and the visual acuity correction tool 1 includes an eye shield plate 2 and a controller 3. Further, the eye-shielding plate 2 is composed of a light-shielding portion 4 having a pinhole 41, a liquid crystal shutter portion 5, a negative film 6 having a through hole 61, and a plate portion 7, and the liquid crystal shutter portion 5 and the controller 3 are connected via a wiring cord L. Is electrically connected. In FIG. 1, the thicknesses of the respective members 4 to 7 are exaggeratedly depicted in order to make the structure of the eye shield plate 2 easy to see, and these are shown in order to show the positional relationship between the pinhole 41 and the through hole 61. Is shown by the dotted line.

FIG. 2 shows a state in which each configuration of the eye shield plate 2 is disassembled. The plate portion 7 has a thickness of about 1 mm, which is composed of a light-shielding portion 4, a liquid crystal shutter portion 5, and an eye pad portion 71 to which a negative film 6 is attached in the thickness direction, and a grip portion 72 which is a portion held by the user when used. It is a transparent plate made of plastic.

The light-shielding portion 4 is a light-shielding film having a thickness of about 180 μm, and is provided with a pinhole 41 for the user to visually recognize the outside world when using the eye-shielding plate 2. The diameter of the pinhole 41 is preferably about 0.6 mm to 1.0 mm because if it is too narrow, the field of view becomes dark and if it is too large, the so-called pinhole effect disappears.

The liquid crystal shutter unit 5 is made of a polymer-type liquid crystal having a high light transmittance when not energized and a low light transmittance when energized, and is in a light transmitting state by an electric signal of the controller 3. And the transparency restriction state can be switched. Since the liquid crystal shutter 5 covers the pinhole 41, it is possible to control the transmission state and the transmission limitation state of the incident light from the pinhole 41.

The negative film 6 is a 180 μ film, and since the liquid crystal used in this embodiment was milky white, it was attached to enhance the light-shielding effect other than the pinhole 41. The negative film 6 is provided with a through hole 61 having a diameter slightly larger than that of the pinhole 41 at a corresponding position of the pinhole 21.

FIG. 3 is a block diagram for explaining the structure of the controller 3 that controls the light transmission state and the transmission limitation state of the liquid crystal shutter unit 5. The controller 3 includes a pulse generator 31, a frequency control unit 32, a pulse width control unit 33, a setting selection unit 34, an LCD driver 35, and a setting storage unit 36. The setting storage unit 36 stores the frequency and the pulse width in association with each other. For example, when the frequency is 1 Hz, it is stored that the pulse width is set to 0.5 seconds. In this embodiment, some shutter speed setting values are stored in the setting storage unit 36 in order to make the shutter speed of the liquid crystal shutter unit 5 variable according to the usage environment and the user's condition.

The setting selection unit 34 is configured to select and read the recorded data for setting the shutter speed stored in the setting storage unit 36.

The frequency signal read from the setting storage unit 36 by the setting selection unit 34 is output to the frequency control unit 32, and the frequency of the pulse signal generated by the pulse generator 31 is changed by the operation of the frequency control unit 32. Then, the pulse signal generated by the pulse generator 31 is output to the pulse width control unit 33.

Further, the pulse width read from the setting storage unit 36 by the setting selection unit 34 is output to the pulse width control unit 33, and is output to the LCD driver 36 after the pulse width is changed by the pulse width control unit 33. ..

The LCD driver 36 is electrically connected to the liquid crystal shutter unit 51 via the wiring cord L, and outputs a pulse signal that matches the operating voltage of the liquid crystal shutter unit 51.

To use the visual acuity correction tool 1 configured in this way, first, the user grasps the grip portion 72 by hand and sets the pinhole 41 so as to be arranged in the eye to be corrected. When the controller 3 is operated in this state, the user can visually recognize the appearance from the pinhole 41 with the pinhole effect in the light transmitting state of the liquid crystal shutter unit 5. That is, the user can visually recognize the outside world in a state where an object farther than the naked eye is in focus. On the other hand, in the light transmission limited state of the liquid crystal shutter unit 5, the incident light from the pinhole 41 is blocked, and the user cannot see the outside world from the pinhole 41. By repeating the transmission state and the transmission limitation state for a predetermined time at the shutter speed set by the controller 3 (hereinafter, this operation is referred to as "shutter operation"), the user can use the vision correction tool 1 after use. In, it is possible to obtain a visual acuity correction state such as making it easier to see the target object and feeling the brightness.

Although there are individual differences among users, it has been confirmed at this point that a vision correction state can be obtained by setting the shutter speed to around 1 second (sec) / time and using it for about 10 to 15 minutes.

In the present embodiment, one pinhole 41 is provided on the eye shield plate 2 and one eye is used, but a total of two pinholes 41 may be provided at positions corresponding to both eyes. ..

Further, in the present embodiment, the visual acuity corrector 1 is held in the hand and the eye shield plate 2 and the controller 3 are separately configured. For example, the visual acuity corrector 1 is a spectacle type and the eye shield plate 2 is used. It may be configured as a lens portion of both eyes.

The visual acuity correction tool 10 shown in FIG. 5 is configured in this way. Specifically, with reference to FIGS. 4 and 5, the eyeglass-type visual acuity corrector 10 is simplified and schematically shown in FIG. 5, and FIG. 4 is the eye shield plate 2 in FIG. However, the structure of the portion of the eye-shielding plate 2 surrounded by the circle indicated by the arrow is the lens portion (eye-shielding plates 20 and 20) of the frame 8. Although the controller 3 is connected to each of the

eye shield plates

20 and 20, it is omitted here. In the visual acuity corrector 10, a controller 3 (not shown) is connected to the left and right

eye shield plates

20 and 20, and the controller 3 can control only one, both, or both to operate the shutter alternately. It is configured.

In order to demonstrate the visual acuity correction effect of the present invention, the present inventors conducted experiments (treatments) under various conditions using the above-described spectacle-type visual acuity correction tool 10, and the results are shown below. It is shown as an example. In the following, only the right eye is shuttered and only the right eye is treated.

<Example 1>
The subject first measured the visual acuity of the naked eye of the right eye before the treatment, and then the subject was asked to wear the visual acuity correction tool 10 to measure the visual acuity of the right eye after the treatment, and the change in the visual acuity with the passage of time was measured. The treatment conditions were such that the diameter of the pinhole 41 was 1 mm and the shutter speed was 1 sec / time, and the moving image displayed on the TV at a distance of 5 m from the 50-inch size TV was viewed through the pinhole 41 for 15 minutes. At this time, the video on the TV was adjusted to be slightly blurred. The results of the treatment are shown in Table 1 below.

[Table 1]

Table 1 shows the visual acuity of the subjects before the treatment and the visual acuity after the treatment over time. The visual acuity of the subjects before the treatment was 0.4, but when the visual acuity was measured after the treatment, it was 0. The eyesight was improved to 6. After that, the visual acuity of the subject was measured about every hour such as 12:00 and 13:00, but the visual acuity was maintained in a corrected state without returning to the visual acuity before the treatment throughout the day.

<Example 2>
The other treatment conditions are the same as those in Example 1, except that what the subject sees during the treatment is not a moving image but a blurred still image, which is different from Example 1. The results of the treatment are shown in Table 2 below.

[Table 2]

With reference to the treatment results of Example 2, the visual acuity of the subject before the treatment was 0.5, but after the treatment, the visual acuity improved to 0.7. Furthermore, the visual acuity did not deteriorate even in the measurement results about every hour, and the visual acuity was maintained in a corrected state throughout the day as in Example 1.

<Example 3>
The treatment conditions are the same as in Example 1, except that what the subject sees during the treatment is not a blurry video but a clear video, and the distance between the subject and the television is 3 m, which is closer than in Example 1. Is. The results of the treatment are shown in Table 3.

[Table 3]

With reference to the treatment results of Example 3, the visual acuity before the treatment was 0.7, and the visual acuity immediately after the treatment was 0.8, which was slightly improved, but the visual acuity correction effect was not stable, and the final measurement on this day. At that time, his visual acuity had returned to 0.7 before the procedure. From this result, it was found that when the moving image is used for the treatment, the visual acuity correction effect can be maintained by the slightly blurred moving image rather than the clear moving image. In addition, as for the videos to watch, those that move fast are more effective in correcting eyesight than those that move slowly, especially those that are clearer than those that are blurry, and those who are younger, such as elementary school students and junior high school students. The effect was remarkable.

<Example 4>
The treatment conditions of Example 4 were the same as those of Example 1, but since the subject's visual acuity was extremely poor at 0.05, the treatment was performed with the subject wearing eyeglasses and wearing the vision correction tool 10. We compared the method of performing the procedure and the method of performing the procedure without wearing glasses. The results of the treatment are shown in Table 4.

[Table 4]

In Table 4, the upper part is the result of the treatment without wearing glasses under the same conditions as in Example 1, and the lower part is the result of the treatment with the glasses on, but the treatment was performed in the same state as in Example 1. In some cases, the visual acuity before the treatment was 0.05, while the visual acuity after the treatment was 0.15, which was improved, but when the glasses were worn, the visual acuity before the treatment was 0.4. The visual acuity after the treatment was 0.7, which was higher in the visual acuity correction effect than the former. From this result, it was found that for people with poor visual acuity, the effect of correcting visual acuity is higher when the treatment is performed with the visual acuity adjusted by using eyeglasses or contact lenses.

<Example 5>
Example 5 is the same as that of Example 4 except that the moving image seen by the subject is a clear moving image and the distance between the subject and the television is 3 m. The results of the treatment are shown in Table 5.

[Table 5]

Similar to Example 4, when the treatment was performed without wearing glasses, the visual acuity before the treatment was 0.05 and improved to 0.15 after the treatment, but the visual acuity returned with the passage of time thereafter. On the other hand, when the treatment was performed with the glasses on, the visual acuity before the treatment was 0.4, the visual acuity after the treatment was 0.4, and then 0.5, which was a temporary improvement. It has returned to 0.4. From this result, it was found that the visual acuity correction effect was higher in the blurred video than in the clear video.

In the subject of Example 1, when a visual acuity test was performed after a certain period of time (about 1 month) after the treatment, the visual acuity correction effect was maintained without deterioration.

The same treatment was performed only with the liquid crystal shutter without using pinholes, but the effect of correcting eyesight was not obtained. From this, it was found that the visual acuity correction effect can be obtained by watching a moving image or a still image for a certain period of time using a pinhole.

In addition, when the visual acuity correction tool is a spectacle type as described above, it is possible to perform the treatment by performing the shutter operation on both eyes, but in that case, the shutter operation is performed on both eyes at the same time. Rather, the visual acuity correction effect is higher when both eyes are shuttered alternately.

1, 10

Eyesight corrector

2, 20 Eye shield plate 3 Controller 31 Pulse generator 32 Frequency control unit 33 Pulse width control unit 34 Setting selection unit 35 LCD driver 36 Setting storage unit 4 Shading unit 41 Pinhole 5 LCD shutter unit 6 Negative Film 7 Plate part 71 Support plate 72 Grip part L Wiring cord

Claims

It has a light-shielding portion having a pinhole and a liquid crystal shutter portion made of a liquid crystal that is overlapped with the light-shielding portion in the thickness direction and can switch between a light transmission state and a transmission restriction state, and from the pinhole in the transmission state. An eye-shielding plate that allows you to see the outside world,
A controller that is connected to the liquid crystal shutter unit and periodically switches between a transmission state and a transmission restriction state of the liquid crystal shutter unit.
A vision correction tool characterized by being equipped with.
A visual acuity correction method using the visual acuity correction tool according to claim 1.
A visual acuity correction method characterized by viewing a blurred moving image from the pinhole.
A visual acuity correction method using the visual acuity correction tool according to claim 1.
A method for correcting visual acuity, which is performed by looking at the outside world from the pinhole while wearing glasses or contact lenses.