JPH08257077A - Sight recovery training device - Google Patents

Abstract

PURPOSE: To provide a sight recovery training device for displaying an image never tiring a trainee. CONSTITUTION: A sight recovery training device 10 has a lateral pair of longitudinally movable LCD panels for displaying an animation including a target and a background within a device body 20. Parallax and convergence can be imparted to the lateral images displayed on the LCD panels. Proper video tapes 16, 18 according to condition and age are reproduced in a video deck 12. A trainee watches the image including the target and the background which is longitudinally, vertically, horizontally moved, and changed in size through oculars 32L, 32R. An image having a sense of distance and a sense of reality is displayed, whereby the attention of the trainee cart be continuously attracted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visual acuity recovery training device.

[0002]

2. Description of the Related Art Deterioration of the visual acuity control function such as myopia and hyperopia may be recovered to a normal state by proper training. Therefore, various visual acuity recovery training devices for restoring the visual acuity adjustment function are provided.

In such a visual acuity recovery training device, for example, a slide image is formed inside the device, and an eyepiece lens is arranged between the slide image and the eyes of the trainee.
There is a device in which the optical path length (hereinafter referred to as "optical distance") between the virtual image position of the slide image optically formed by the eyepiece and the trainee's eyes is changed. With this device, the trainee looks at the slide image inside the device and sees the slide image in which the optical distance alternates between long distance and short distance, thereby performing the function recovery training of the ciliary body to focus the distance. Can be done. With this device, when the trainee views the slide image, the effect of the training cannot be obtained unless the trainee tries to focus on the slide image. In other words, the trainee must focus his attention on the slide image and try to see it firmly.

However, since the slide image formed inside this apparatus is a still image whose display content itself does not change even if the perspective changes, the trainee quickly becomes bored and cannot focus. It is easy to just look at the slide images. Especially for children,
You may even not see the slide image. Therefore, a sufficient training effect may not be obtained.

[0005]

SUMMARY OF THE INVENTION Therefore, the technical problem to be solved by the present invention is to provide a visual acuity recovery training device in which a trainee can see an image without getting tired and the training effect is enhanced. Is.

[0006]

In order to solve the above technical problems, according to the present invention, a visual acuity recovery training device having the following configuration is provided.

That is, this visual acuity recovery training device is a device capable of performing visual acuity recovery training by viewing an image including a target and a background through an eyepiece optical system. This device is an optotype display means for displaying the optotype, a background display means for displaying the background, an optical distance between the optotype and an eyeball gazing at the optotype, and an optical distance of the eyepiece optical system. A first target moving means for optically changing the distance to a short distance or a short distance substantially along the optical axis direction; and a first target moving means for moving the target vertically and vertically in a direction substantially perpendicular to the optical axis direction of the eyepiece optical system. 2 target moving means.

In the above structure, when there is no optical system such as a lens or a mirror between the optotype and the eyeball gazing at the optotype, the "optical distance" is the optotype and the eyeball gazing at the optotype. Becomes the actual distance between. Further, when an optical system such as a lens or a mirror is arranged between the optotype and the eyeball gazing at the optotype, as described above, between the virtual image position of the optotype and the eyeball gazing at the optotype. The optical path length of is the optical distance. Further, “optically changing” the optical distance includes not only the case where the target is actually moved to change the optical distance, but also the case where the target is placed between the target and the trainee's eyeball. The optical distance may be changed by changing the characteristics of the optical system. For example, the position of the optical system,
This includes cases such as changing the direction and changing the focal length.

In the above structure, the visual target display means and the background display means form an image of the visual target and the background that the trainee can see. The background does not necessarily have to appear to be behind the optotype, but some or all of the background may appear to be in the same or forward position as the optotype. Further, usually, only one optotype is used at a time as a target to gaze, so it is preferable to display only one optotype, but a plurality of optotypes may be displayed.

The structure of the optotype display means and / or the background display means is arbitrary. For example, an article having an image as a visual target and / or a background may be arranged so that the image of the article can be seen. Alternatively, the visual target and / or the background may be displayed by displaying an image on a screen or the like, or by forming a stereoscopic image in space by holography. Moreover, the visual target and / or the background are not limited to still images, and
The position, size, shape, pattern, color, brightness, etc. may change. The optotype display means and the background display means may be the same display method or different display methods.

The optotype is three-dimensionally moved to the trainee by the first optotype moving means and the second optotype moving means, moving the optotype to the perspective and up, down, left and right. The configurations of the first and second target moving means are arbitrary. For example, the optotype itself displayed by the optotype displaying means may be moved. Alternatively, as described above, the first optotype moving unit may arrange an optical system such as a lens or a mirror between the optotype and the eyeball of the trainee to change the optical characteristics. Further, a specific optotype may be displayed continuously or intermittently and moved, or a plurality of different optotypes arranged at different positions may be appropriately selected and displayed sequentially or simultaneously. Further, the first optotype moving unit and / or the second optotype moving unit may be manually operated at any time, or a certain procedure may be automatically executed.

In the above configuration, by making the display contents of the background and the optotype relevant to each other so that the optotype has a specific character and changing the optotype three-dimensionally, for example, For movement of the target against the background,
It is possible to give a sense of reality, narrativeness, and unexpectedness to continuously attract the eyesight trainee's interest.

Therefore, the visual acuity recovery training device enables the trainee to view the image without getting tired and enhances the training effect.

In the above structure, it is possible to adopt a structure in which the second target moving means for moving the target vertically and horizontally is not provided.

In such a structure, the visual target moves only forward and backward, as in the conventional slide image type apparatus described above. However, in such a configuration, instead of providing the optotype and the background in one still image as in the slide image method, for example, an optotype having one or two or more specific characters can be displayed. It is possible to continuously attract the interest of the eyesight recovery trainee by moving the background having a relationship with the target character by changing the distance.

Therefore, even with the visual acuity recovery training device having such a configuration, the training effect can be enhanced by allowing the trainee to view the image more quickly than the conventional device.

Preferably, the optotype display means and the background display means have a common screen, and the optotype and the background are displayed on the common screen. For example, an optotype and a background are displayed on a screen which is a common screen.

With the above structure, it becomes easy to display the optotype and the background in association with each other.

Preferably, the common screen is an LCD panel.

In the above structure, since the LCD panel forms an image inside, it is not necessary to project the image from the outside onto the screen which is a common screen. Therefore, the structure of the device is simplified.

[0021] Preferably, the first target moving means includes common screen moving means for moving the common screen substantially along the optical axis direction.

In the above structure, the common screen moving means located at a position away from the trainee operates to change the optical distance.

Therefore, since the moving part is away from the trainee, the trainee is less likely to feel discomfort.

Preferably, the optotype display means and the background display means display the optotype and the background separately on the left and right sides, and at least in accordance with a change in the optical distance.
Any of parallax, vergence and the size of the target is changed.

In the above configuration, the visual target and the background viewed by the trainee are displayed separately on the right and left sides, and a part or all of the left and right displays are appropriately shifted in the left and right directions to give a parallax to the display image, which is adjusted according to the optical distance. When the magnitude of the lever parallax is changed, the sense of perspective experienced by the trainee changes according to the optical distance.

The left and right targets and / or backgrounds viewed by the trainee are separately displayed, and a part or all of the left and right displays are appropriately shifted in the left and right direction to give convergence to the display image, thereby reducing the optical distance. Accordingly, if the magnitude of this congestion is changed, the sense of perspective experienced by the trainee becomes closer to reality.

Further, when the size of the target viewed by the trainee is changed so that it becomes larger at shorter distances and smaller at longer distances according to the optical distance, the sense of perspective experienced by the trainees becomes more realistic. Becomes

As described above, at least parallax, congestion,
By varying either of the sizes of the targets, the trainee can see a more realistic image in perspective. Therefore, the trainee can see the image more tiredly, and the training effect is further enhanced.

Preferably, the first target moving means and / or the second target moving means further includes target moving speed changing means for changing the moving speed of the target.

In the above configuration, the way of moving the optotype can be appropriately changed according to the symptoms and age of the trainee. Further, the movement of the visual target can be changed so as not to be monotonous, and the attention of the trainee can be more and more continuously attracted to the image formed by the apparatus.

Therefore, the effect of the visual acuity recovery training can be further enhanced.

Preferably, the target moving speed changing means changes the moving speed of the target when the first target moving means changes the optical distance from the short distance to the long distance by the first view. The target moving means makes the optical distance slower than the moving speed of the target when changing the optical distance from a long distance to a short distance.

In the above structure, the speed of focusing from a long distance to a short distance is relatively high, and the speed of focusing from a short distance to a long distance is relatively slow, which is suitable for the visual acuity adjustment characteristics of the human eye. Then, the target can be moved.

Therefore, by adapting the moving speed of the visual target to the visual acuity adjustment characteristic of the human, the visual acuity recovery training effect can be further enhanced.

Preferably, at least one of the image of the optotype displayed by the optotype display means, the image of the background displayed by the background display means, and an operation pattern for operating the second optotype moving means. Is stored as a moving image,
An external storage means for storing an operation pattern for operating the first target moving means as an operation control signal, and an external storage reproduction means for reproducing the moving image and the operation control signal stored in the external storage means are further provided. Prepare here,
The "moving image" means not only so-called animation but also an image whose display content can change with time.

In the above structure, the external storage means stores the predetermined training content as a moving image and an operation control signal.
The moving image stored by the external storage means is reproduced by the external storage reproduction means and provided to the visual acuity recovery device.
The reproduced moving image is displayed as an optotype and a background.
The operation control signal stored by the external storage device is reproduced by the external storage reproduction device and provided to the visual acuity recovery device. The target is moved back and forth based on the reproduced motion control signal.

In the above structure, the vertical and horizontal movements of the visual target and the moving speed thereof are stored in the external storage means as a moving image. Further, the back and forth movement of the target and its moving speed are stored in the external storage means as an operation control signal. Then, these memories are reproduced by the external memory reproducing means, and the visual target is moved based on the reproduction. In this sense, the external storage means also has a function as the first target moving means, the second target moving means, and the target moving speed changing means.

In the above structure, the external storage means in which the predetermined training content, that is, the moving image and the motion pattern is stored is reproduced by the external storage reproducing means, whereby the optotype displaying means and the optotype moving means are manually operated individually. It is possible to execute a predetermined training content without repeating the same content. On the other hand, if the external storage means in which different training contents are stored is used, the training contents can be changed.

Therefore, it is easy to set / change the training content.

The visual acuity recovery training apparatus which does not include the second visual target moving means for moving the visual target vertically and horizontally can also be configured in the same manner as described above.

That is, at least one of the image of the optotype displayed by the optotype display means and the image of the background displayed by the background display means is stored as a moving image,
An external storage means for storing an operation pattern for operating the first target moving means as an operation control signal, and an external storage reproduction means for reproducing the moving image and the operation control signal stored in the external storage means are further provided. Prepare

Also in the above-mentioned configuration, similarly, it becomes easy to set / change the training content.

Preferably, the external storage means further stores voice. The apparatus further comprises a voice supplying unit that supplies the trainee with the voice reproduced by the external storage reproducing unit.

With the above configuration, it is possible to provide the trainee with a voice. This voice can provide the trainee with explanations and instructions of the training method, music corresponding to the display of images, and the like.

Therefore, it is possible to further enhance the training effect by allowing the trainee to view the image without getting tired.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The visual acuity recovery training apparatus according to the embodiments of the present invention shown in FIGS.

First, the outline of the overall configuration of the visual acuity recovery training apparatus according to the first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is an overall configuration diagram of a visual acuity recovery training device. FIG. 2 is a principle diagram of image display. FIG. 3 is a display example of an image. FIG. 4 is a block diagram of the visual acuity recovery training device. FIG. 5 is a flowchart of the control sequence.

As shown in FIG. 1, the visual acuity recovery device 10 includes:
Generally, the device body 20 and a tripod 21 that supports the device body
A video deck 12 connected to the apparatus body 20, headphones 14 connected to the video deck 12, and video tapes 16 and 18 that can be played back by the video deck 12. VCR 12
Includes a video tape inserting section 12a and a video tape reproducing section 12b.

With the above structure, the video tape reproducing section 12b of the video deck 12 reproduces the video tapes 16 and 18 loaded from the video tape inserting section 12a and sends the reproduced video signal to the apparatus main body 20. By the video signal, a video image for visual acuity recovery training, that is, an image is formed on an LCD panel (described later) provided inside the device body 20. The images are provided as video. Videotapes with recorded images, for example, presbyopia,
Video tape 16 for myopia and video tape 18 for myopia
And the like are prepared and the videotapes 16 and 18 are exchanged so that an image suitable for the purpose can be provided.

A pair of left and right eyepieces 32R and 32L are provided at one end of the apparatus body 20, and a trainee can look through the images formed inside the apparatus body 20 through the eyepieces 32R and 32L. Since the device body 20 is supported by the tripod 21, the device body 20 can be freely arranged vertically and horizontally, and the trainee can look at the image in a relaxed posture.

The image includes a target and a background that the trainee looks at. During training, the optotype moves up, down, left and right within the LCD panel that displays the image. Further, the LCD panel itself is moved back and forth with respect to the apparatus main body 20, and the optical distance between the visual target and the trainee is appropriately changed. That is, the target moves three-dimensionally.

Audio corresponding to images is also recorded on the videotapes 16 and 18. This sound is also reproduced by the video tape reproducing section 12b of the VCR 12 and provided to the trainee from the headphones 14. The voice includes, for example, explanations and instructions of the training method, music according to the image, and the like.

The inside of the apparatus main body 20 is generally constructed as shown in FIG. That is, a pair of left and right eyepieces 32L and 32R, a pair of left and right LCD panels 30L and 30R, and a diffusion plate 26 are arranged from the outer side to the inner side of the device body 20.
And a pair of left and right lamps 22L and 22R, in this order,
Each is arranged substantially along the left and right optical axes. Lamp 2
2L and 22R have reflection plates 24L and 24R, respectively. A light shielding plate 28 is disposed between the left and right optical axes, and the left eye only has the left LCD panel 30L and the right eye has the right LCD.
Only the panel 30R is viewed. The LCD panels 30 </ b> L and 30 </ b> R are movable integrally with the device body 20 substantially along the optical axis of the eyepiece lens, and the other parts are in fixed positions with respect to the device body 20.

With the above structure, the light rays from the lamps 22L and 22R are transmitted through the diffuser plate 26 to become diffused light, which is LC
The D panels 30L and 30R are illuminated from the back. The trainee can see through the eyepieces 32L and 32R the images formed by the LCD panels 30L and 30R illuminated from the back. Eyepieces 32L and 32R are L
An image (virtual image) is optically formed at a position apart from the actual positions of the CD panels 30L and 30R. Ie LCD
The position of the virtual image of the image formed by the panels 30L and 30R is separated from the actual position of the LCD panels 30L and 30R. Therefore, even if the device body 20 is small, it is possible to optically form an image (virtual image) at a long distance. When the LCD panels 30L and 30R are moved back and forth substantially along the optical axis with respect to the device body 20, the optical path length between the image (virtual image) and the eyeball, that is, the optical distance, changes from a short distance to a long distance. .

The image is displayed, for example, as shown in FIG. That is, a landscape, that is, a background image is formed over substantially the entire screen 34 of each of the LCD panels 30L and 30R. An image of one optotype 36F or 36N is formed on a part of the screen 34. The optotypes 36F and 36N move vertically and horizontally within the range of the screen 34. For example, the position moves from the position indicated by reference numeral 36F to the position indicated by reference numeral 36N.

Preferably, the optotypes 36F and 36N are small when the LCD panels 30L and 30R are on the far distance side, that is, when the optical distance is long, as small as 36F and on the short distance side. That is, when the optical distance is short, it is increased as indicated by reference numeral 36N. As a result, the perspective of the visual targets 36F and 36N becomes more realistic. The background image is usually the optotypes 36F and 36N.
However, it is also possible to form part or all of the background image so as to be seen in front of the target. Further, the background image may be in focus as in the image of the optotype, or may be out of focus depending on the distance.

Next, the configuration will be further described with reference to the block diagram of the visual acuity recovery device 10 shown in FIG.

That is, the VCR 12 is connected to the headphones 14 and the video signal processing circuit 40.
The video processing circuit 40 includes a pair of left and right LCD drive circuits 44.
It is connected to L, 44R and CPU42. The pair of left and right LCD drive circuits 44L and 44R are connected to the LCD panels 30L and 30R, respectively. The CPU 42 is connected to the start switch 46, the motor drive circuit 48, and the backlight control circuit 50. The backlight control circuit 50 includes a pair of left and right backlights, that is, the lamp 22.
It is connected to L and 22R. Furthermore, the eyesight recovery training device 1
AC / DC power unit 5 to supply power to each part of 0
2 is provided.

With the above structure, when the video deck 12 reproduces the video tapes 16 and 18, the audio signal is sent to the headphones 14 while the NTSC system video signal is sent to the signal processing circuit 40. This video signal contains
A video signal for displaying two LCD images and various control signals are included.

The video signal processing circuit 40 processes the video signal, separates and combines the left and right image signals from the video signal, and sends them to the left and right LCD drive circuits 44L and 44R. Further, the video signal processing circuit 40 digitizes the diopter signal, the lamp brightness signal, and the blinking mode signal included in the video signal, and transfers them to the CPU 42 together with the synchronization signal.

The LCD drive circuits 44L and 44R are driven by the image signal from the signal processing circuit 40 to generate the LCD panel 30.
LCD panel 30L, the drive signal for driving L, 30R,
Send to 30R.

The CPU 42 controls on / off of the entire apparatus by a signal from the start switch 46. Further, the CPU 42 calculates the target position of the LCD panels 30L and 30R based on the diopter signal from the signal processing circuit 40 and sends the target position information to the motor drive circuit 48. Further, the CPU 42, based on the brightness signal and the blinking mode signal from the signal processing circuit 40, the lamps 22L, 22R.
And sends the brightness control information to the backlight drive circuit 50.

The motor drive circuit 48 drives the motor 49 based on the target position information to drive the LCD panels 30L and 30L.
Move R back and forth.

The backlight control circuit 50 adjusts the brightness of the lamps 22L and 22R based on the brightness control information.

The visual acuity recovery training device 10 having the above-described configuration is shown in FIG.
The operation is almost the same as the flowchart shown in FIG.

That is, in step # 202, the visual acuity recovery training device 10 waits for the start switch 46 to be turned on. When the start switch 46 is turned on,
In step # 204, the video signal is supplied from the VCR 12. Then, when the video signal is supplied, in step # 206, the diopter signal, the brightness signal, and the blinking mode signal included in the video signal are input to the CPU 42 via the signal processing circuit 40. Then, in step # 208, the CPU 42 drives the motor 49 via the motor drive circuit 48 based on the diopter signal to move the LCD panels 30R, 30L to predetermined positions. Further, in step # 210, the CPU 42
Controls the brightness of the lamps 22R and 22L via the backlight control circuit 50 based on the brightness signal and the blinking mode signal.

The visual acuity device recovery apparatus 10 having the above structure will be described in more detail.

First, the processing of the video signal by the signal processing circuit 40 will be described in detail with reference to FIGS.

FIG. 6 is a waveform diagram of a video signal. Figure 7
FIG. 4 is a configuration diagram of image display. FIG. 8 is a waveform diagram of the image signal. FIG. 9 is a detailed circuit diagram of the signal processing circuit 40. FIG. 10 is a timing chart of signal processing.

As shown in FIG. 6, each frame signal 55 of the video signal 53 is divided into two by the sync signal 54.
One field signal 56L, 56R is included. General NT
In the case of the SC type video signal, two field signals 56
L and 56R correspond to two interlaced scanning signals for one image, and two field signals 56L and 56R
To display one image. That is, one frame signal 55 reproduces one image.

On the other hand, in the visual acuity recovery training device 10, each of the field signals 56L and 56R is used to display two left and right images. That is, of the two field signals 56L and 56R included in each frame signal 55, one field signal 56L
For the left LCD panel 30L and the other field signal 56R for the right LCD panel 30R.

Specifically, first, the left and right field signals 56L and 56R are separated from the video signal 53 shown in FIG. Then, as shown in FIG. 8, the left image signal 5
7L repeats the left field signal 56L twice, and becomes 1
A field signal is used for synthesis. Similarly, the right image signal 57R is the right field signal 56R.
L is repeated twice to form a 1-field signal, which is combined.

As shown in FIG. 6, each field signal 56L, 56R includes a control signal 58L, 58R at a portion having a predetermined length from the synchronization signal 55. The control signals 58L and 58R are also included in the left and right image signals 57L and 57R, respectively, as shown in FIG. Therefore, when the left and right images are formed by using the image signals 57L and 57R as they are, a portion other than the original image, that is, a portion corresponding to the control signals 58L and 58R is displayed.

Therefore, the image formed based on the video signal 53 is displayed as shown in FIG. That is, LC
The D display frames 60L and 60R are partially covered by the screen frames 62L and 62R, and the image display portion 64 corresponding to the control signals 58L and 58R is hidden by the screen frames 62L and 62R. Therefore, of the images displayed in the LCD display frames 60L and 60R by the left and right image signals 57L and 57R, only the original video is displayed in the screen frames 62L and 62R.

A signal processing circuit 4 for processing the video signal 53.
0 is configured as shown in FIG. That is, the signal processing circuit 40 includes an A / D converter 41a, a memory 41b,
It includes a D / A converter 41c, a switch 41d, and a timing control circuit 41e. The video signals are input to the left and right image signal systems 40L and 40R and the timing control system 40T.
And the control signal system 40S are connected in parallel.

In the left and right image signal systems 40L and 40R, the video signal is directly connected to the A contact of the switch 41d. On the other hand, a video signal is connected to the B contact of the switch 41d via the A / D converter 41a, the memory 41b, and the D / A converter 41c which are connected in series. The outputs of the left and right image signal systems 40L and 40R switches 41d are LC
The D drive circuits 44L and 44R are respectively connected.

In the timing control system 40T, the video signal is connected to the timing control circuit 41e. Output terminals R ₁ , W ₁ , R ₂ , W ₂ , S of the timing control circuit 41e
W ₁ and SW ₂ are connected to the input terminals R ₁ , W ₁ , R ₂ and W ₂ of the memories 41b of the left and right image signal systems 40L and 40R and the input terminals SW ₁ and SW _{2 of} the switch 41d, respectively. It Further, the synchronization signal from the timing control circuit 41e is CP
It is connected to U42 (see FIG. 4).

In the control signal system 40S, the video signal is connected to the A / D converter 41a, and the output of the A / D converter 41a is connected to the CPU 42 (see FIG. 4).

In the above structure, the A / D converter 41a
Digitizes the video signal. The memory 41b stores the digitized data. D / A converter 41c
Converts the digital data from the memory 41b into analog data. The switch 41d switches the output between the A contact and the B contact based on the timing signal from the timing control circuit 41e. The timing control circuit 41e includes a memory 41b, a switch 41d, a CPU based on the video signal.
42 (see FIG. 4) and timing signals and synchronization signals for controlling the operation of each element.

When the switch 41d is set to the A contact side by the timing signal from the timing control circuit 41e, the video signal remains as it is and the LCD drive circuits 44L and 44L.
It is output to R. At this time, the timing control circuit 41e
Is a R ₁ or R ₂ terminals of the memory 41b to high, and stores the video signal in the memory 41b.

On the other hand, when the switch 41d is set to the B contact side by the timing signal from the timing control circuit 41e, the timing control circuit 41e operates in the signal memory 41b.
The W ₁ or W ₂ terminal of is set to high, and the contents stored in the memory 41b are output to the LCD drive circuits 44L and 44R via the D / A converter 41c and the switch 41d.

In the timing control circuit 41e, the left image signal system 40L, that is, the timing signals for the terminals SW ₁ , R ₁ and W ₁ , and the right image signal system 40R, that is, the terminal S.
The control timings of the timing signals for W ₂ , R ₂ and W ₂ are in opposite phases as shown in the timing chart of FIG.

Next, the device body 2 of the visual acuity recovery training device 10
The internal configuration of 0 will be described in detail with reference to FIGS.

FIG. 11 is an exploded perspective view of the apparatus main body 20. FIG. 12 is a perspective view of a main part of the internal configuration of the apparatus body 20.

As shown in FIG. 11, the apparatus main body 20 is roughly divided into an upper cover 102 and a lower cover 1 which are divided into upper and lower parts.
04, the display unit 120 and the printed circuit board 11 housed inside the upper cover 102 and the lower cover 104.
4 and the AC unit 110. Lower cover 1
06 has a tripod base 108 for attaching the tripod 21 (see FIG. 1). The printed circuit board 114 includes a display unit 120, an AC unit 110, and a video input terminal 1
12 and 12 are connected. The printed circuit board 114 has a switch 46, and the switch cover 104 protruding to the outside from the switch hole 102h of the upper cover 102 is engaged with the switch 46. The display unit 120 includes a lamp holder 130 attached to a display unit base plate 122.
The motor unit 140 (see FIG. 12), the LCD holder 150, and the lens holder 160 are included. Upper cover 1
02 and the lower cover 106, the display unit 120 is assembled between the eyepiece 32 of the lens holder 160.
The L and 32R are exposed to the outside from the device body 20.

The display unit 120 is constructed as shown in FIG. That is, the lamp holder 130, the motor unit 140, and the LCD holder 150 are mounted inside the display unit base plate 122 having a substantially U-shape, and the lens holder 160 is attached to the open front end 125 of the display unit base plate 122. It is attached.

The LCD holder 150 is mounted inside the display unit base plate 122 in parallel with the front-rear direction.
It is slidably attached to the slide shaft 151 of the book.
The slide shafts 151 are arranged vertically in order to reduce the vertical play of the LCD holder 150. A slide guide portion 153 into which the slide shaft 151 is inserted is provided on the upper and lower portions of the LCD holder 150. The slide guide portion 153 is sufficiently long, and the slide shaft 151
The part that slides in is long enough. Therefore, LCD holder 1
The backlash on the left and right of 50 is reduced. LCD holder 1
50 is an LCD panel 30L, 3 housed inside
0R (not shown) is fixed from the rear by the LCD pressing plate 152. The LCD holder 150 is provided with the light shielding plate 28 on the front surface thereof and the projection 154 on the upper portion thereof.

A motor unit 140 is attached to the lower surface of the upper wall 123 of the display unit base plate 122. The drive shaft 142 of the motor unit 140 is a slide shaft 151.
And a thread is formed on the outer peripheral surface thereof. This screw engages the protrusion 154 of the LCD holder 150. Then, the drive shaft 142 of the motor unit 140
The rotation of the LCD holder 150 causes the slide shaft 15 to move.
Move back and forth along 1.

A lens holder 160 for holding the eyepieces 32L, 32R is fixed to the front end 125 of the display unit base plate 122.

The lamp holder 130 has a box shape,
The diffusion plate 26 is provided on the front surface and the lamp mounting plate 132 is provided on the rear surface. The lamp mounting plate 132 is provided with a pair of left and right lamps 22L and 22R and reflecting plates 24L and 24R. When the mounting plate 132 is mounted on the lamp holder 130 from the rear as shown by an arrow 133, the mounting plate 132
Upper lamps 22L, 22R and reflectors 24L, 24R
Are housed inside the lamp holder 130. A lamp holder mounting plate 124 and a switch 126 are provided on the rear wall 127 of the display unit base plate 122. When the lamp holder 130 is laterally inserted into the display unit base plate 122 as shown by an arrow 131, the lamp holder 130 is attached to the lamp holder attachment plate 124. The switch 126 is a switch for setting the initial position of the LCD holder 150 as described later.

Next, a method of controlling the image formed by the visual acuity recovery training device 10 will be described in detail with reference to FIGS.

13 to 15 are explanatory views of a method of controlling image display. 16 to 17 are control pattern diagrams according to the training purpose. FIG. 19 is a control flowchart of image display. FIG. 20 is an explanatory diagram of image display that gives parallax. FIG. 21 is an explanatory diagram of an image display method for giving congestion. FIG. 22 is an explanatory diagram of another image display method that causes congestion. FIG. 23 is an explanatory diagram of an image formed by the image display method of FIG.

First, a control method for changing the diopter of an image will be described with reference to FIG. In FIG. 13 (I), the vertical axis represents diopter and the horizontal axis represents time.

The diopter is determined by the virtual image position of the image formed by the LCD panels 30L and 30R and the eyeballs 2R and 2 of the trainee.
It is defined as the reciprocal of the optical distance L (unit is meter) from L. The diopter is calculated by using a negative value as the optical distance when the virtual image position is in front of the eyeballs 2R and 2L, and by using a positive value otherwise (in this case, the image is a real image). To do. That is, when the virtual image position is in front of the eyeballs 2R and 2L, the diopter is defined as −1 / L. The unit of diopter is diopter. The larger the absolute value of diopter is, the shorter the optical distance L is. When the diopter is 0, the optical distance L is infinity, and the positive diopter corresponds to hyperopia.

The diopter is changed by moving the LCD panels 30L and 30R back and forth to change the optical distance L, for example, as in the control pattern shown in FIG. 13 (I).

That is, in FIG. 13 (I), the LCD is initially
A control pattern is shown in which the panels 30L and 30R are largely moved back and forth, that is, in the near distance, the fluctuation width is gradually reduced, and finally 0 diopter, that is, infinity. The illustrated control pattern is repeated an appropriate number of times.

In the illustrated control pattern, the target moving speed is relatively high when the targets are brought close to each other, that is, when the diopter is reduced, and when the target is moved away, that is, when the diopter is increased, the target movement is increased. The speed is relatively slow. This is because the speed of focusing from a long distance to a short distance is faster than the speed of focusing from a short distance to a long distance, and the training is performed in conformity with the physiological characteristic of the human eye.

Further, the target is moved beyond 0 diopter, that is, infinity to a positive diopter, that is, a position corresponding to hyperopia. This is to enhance the training effect.

By changing the diopter as in the above control pattern, recovery training of the focus adjusting function by the ciliary body is executed.

Next, a control method for changing the size of the target according to the change in diopter will be described with reference to FIG. 13 (II). In FIG. 13 (II), the vertical axis represents the size of the target, that is, the target magnification, and the horizontal axis represents time. The horizontal axis corresponds to FIG. 13 (I). The target magnification is 0 diopter, that is, 1 at infinity.

The target magnification is changed in proportion to the diopter, for example, as in the control pattern shown in FIG. 13 (II). However,
At infinity and the position corresponding to hyperopia, the target magnification is constant, that is, 1. That is, the smaller the diopter, in other words, the shorter the optical distance and the closer the target is to the eyeball of the trainee, the larger the target becomes.

Therefore, by changing the optotype magnification with the illustrated control pattern, the optotype is displayed large in the vicinity and small in the distance, so that a realistic optotype image is formed.

Next, a control method for changing the parallax in response to the change in diopter will be described with reference to FIG. 13 (III) and FIG. In FIG. 13 (III), the vertical axis represents the magnitude of parallax and the horizontal axis represents time. The horizontal axis corresponds to FIG. 13 (I). FIG. 20 is an example of an image display that gives parallax.

Parallax means that when the relative position between the eyeball and the external object moves, the position of the retinal image also relatively changes, which is an important factor for determining the perspective of the object.

The parallax is given by shifting the near view display element between the left and right images. For example, in the left and right images 70L and 70R shown in FIG. 20, the positions of the near view display elements, that is, the rivers, trees, rice fields, and houses in the foreground are shifted to the left and right. On the other hand, the distant view display elements, ie the positions of mountains, clouds, distant houses and trees, do not shift.

The parallax is changed corresponding to the diopter, as in the control pattern shown in FIG. 13 (III). That is, the closer the visual target is, the larger the parallax is, and no parallax is given at the infinity and the position corresponding to hyperopia.

By changing the parallax as in the above control pattern, the trainee's visual target becomes more realistic.

Next, a method of changing the congestion in response to the change of the diopter will be described with reference to FIG. 13 (IV) and FIGS. In FIG. 13 (IV), the vertical axis represents the magnitude of convergence, that is, the convergence angle θ described later, and the horizontal axis represents time.
The horizontal axis corresponds to FIG. 13 (I). FIG. 21 is an explanatory diagram of an image display method for giving congestion. FIG. 22 is an explanatory diagram of another image display method that causes congestion. FIG. 23 is an explanatory diagram of an image formed by the image display method of FIG.

Convergence refers to a function in which the lines of sight of both eyes gather toward an object to which they are gazing. For example, when a small small object is placed in front of the center line of both eyes of a person who can see binocular vision and gradually gets closer to the eye while gazing, the binocular eye functions to move inward as the object moves.

As shown in FIG. 21, the congestion is caused by the two eyes 2L,
The display positions 39L, 39R on the LCD panels 30L, 30R of the left and right targets 38L, 38R are given by shifting them inward so that the sight lines 33L, 33R of the 2R face inward and converge at the intersection 37.

The angle θ at which the lines of sight 33L and 33R of both eyes intersect at the intersection 37 is called the vergence angle here. Convergence angle θ
Is θ = tan ⁻¹ ((W / 2) / L) by the optical distance L of the targets 38L and 38R and the width W of the left and right eyes 2L and 2R.
It is represented by × 2. For example, when W = 60 mm, when the diopter is −10 diopters, that is, L = 100 mm, θ = tan ⁻¹ ((60/2) / 100) × 2 = 3
It is 3 °. If the diopter is -5 diopters, that is, L = 200 mm, then θ = tan ^-1 ((60/2) /
200) × 2 = 17 °.

The congestion is changed in accordance with the diopter, as in the control pattern shown in FIG. 13 (IV). That is, the closer the target, the larger the convergence angle θ,
The convergence angle θ is 0 ° at infinity and the position corresponding to hyperopia.

By changing the congestion as described above,
The target that the trainee sees becomes more realistic.

The congestion can be changed by methods other than the above method. Therefore, next, another method of changing congestion will be described.

That is, as shown in FIG. 22 (I), the optical axes of the eyepieces 32L and 32R and the LCD panels 30L and 30R are arranged so as to coincide with the left and right lines of sight 33L and 33R, thereby changing the congestion. You can In this method, the eyepieces 32L and 32R are used to change the convergence.
The entire left and right optical systems constituted by the LCD panels 30L and 30R are tilted in accordance with the directions of the lines of sight 33L and 33R.

Further, as shown in FIG. 22 (2), it is possible to give congestion by moving only the LCD panels 30L and 30R inwardly as shown by arrows 35L and 35R.

With either method, to change the congestion, L
LCD panel 30L, 30 without changing positions 39L, 39R of optotypes 38L, 38R with respect to CD panel 30L, 30R
The position of the entire R is changing.

The left and right images 70L and 70R displayed by the above two methods are as shown in FIG. That is, the positions 39L and 39R of the target are LCD
It is in a fixed position with respect to the panels 30L and 30R.

Next, a control method for moving the visual target in the screen frames 62L and 62R (see FIG. 7) will be described with reference to FIG.
explain. As shown in FIG. 14, screen frames 62L, 62R
Let x be the horizontal axis and y be the vertical axis. In FIG. 14 (I), the vertical axis represents the value of the x coordinate, and the horizontal axis represents time. In FIG. 14 (II), the vertical axis represents y.
The coordinate value is shown, and the horizontal axis shows time. The horizontal axes in FIGS. 14 (I) and (II) correspond to each other.

The visual target is moved from the center s of the screen frames 62L and 62R to the upper right, upper left, lower right and lower left, as in the control pattern shown in FIG.

By moving the visual target as described above, the trainee's line of sight can be made to follow the movement of the visual target, and the line of sight can be moved.

Therefore, the extraocular muscles that move the eyeballs can be trained and blood circulation around the eyes can be promoted.
Further, since the line of sight is not fixed, the trainee is stimulated and the concentration is prevented from decreasing.

Next, regarding the method of controlling the brightness of the image,
This will be described with reference to FIG. In FIG. 15 (I), the vertical axis represents diopter and the horizontal axis represents time. In FIG. 15 (II), the vertical axis represents image brightness and the horizontal axis represents time. 15 (I), (II)
Corresponds to the horizontal axis.

For example, as shown in FIG. 15, the brightness of the image is the brightness of the image, that is, the lamps 22L and 22R with the diopter fixed to 0 diopter, that is, infinity.
Change the brightness of. The diopter is set to 0 diopters so as not to be affected by so-called near vision reaction. In other words, the near vision reaction refers to the physiological characteristics of a person whose pupil becomes smaller when looking closer, and if the near vision reaction occurs, the pupil will not widen even if the image is darkened, so there is a sufficient iris training effect. Because I can't get it.

As described above, the iris of the trainee can be effectively stimulated by changing the brightness of the image at infinity.

As described above, the visual acuity recovery training device 1
The image of 0 is formed in a predetermined control pattern with respect to the diopter, the size of the target, the parallax, the convergence, the movement of the target, and the brightness of the image. When the device 10 is actually used, it is preferable to form an image with a control pattern in which these control elements are appropriately combined according to the purpose of training.

That is, an image is formed in a control pattern as shown in FIGS. FIG. 16 shows a control pattern in the case of recovery training for pseudo myopia of a young person. FIG. 17 shows a control pattern in the case of recovery training for presbyopia of middle-aged and elderly people. FIG. 17 shows a control pattern in the case of general myopia or hyperopia recovery training.
16 to 18, (I) shows the diopter, that is, the control pattern of the forward and backward movement of the LCD panels 30L and 30R, and (II) shows the x coordinate of the visual target, that is, the control pattern of the horizontal movement.
(III) shows the y-coordinate of the target, that is, the control pattern for vertical movement.

For example, in the case of recovery training for pseudo-myopia or presbyopia, it is mainly because the refractive power of the crystalline lens does not work well. Therefore, the training is focused on the distance focus adjustment, that is, the movement of the ciliary body. Therefore, FIGS.
As shown in, the focus is on diopter training and the movement of the target is small.

The middle-aged and elderly have a lower ability to control the ciliary body than the young. Therefore, in the case of the recovery training for presbyopia of middle-aged and elderly persons shown in FIG. 17, the diopter changes slowly compared with the case of the recovery training for pseudo myopia of young persons shown in FIG.

On the other hand, in the case of recovery training for myopia or hyperopia, it is effective to move the muscles around the eyes and the ciliary body evenly. Therefore, as in the control pattern shown in FIG. 18, the diopter is changed and the target is largely moved.

The control pattern for forming an image is recorded on the videotapes 16 and 18 in advance. That is, as described above, a moving image is formed on the LCD panels 30L and 30R by the image signal included in the video signal 53,
Parallax, vergence and size and movement of the target are controlled. On the other hand, the control signal 58 included in the video signal 53
L and 58R control the front and rear positions of the LCD panels 30L and 30R, that is, the diopter, and the brightness of the lamps 22L and 22R, that is, the brightness of the image.

The video tapes 16 and 18 should be prepared according to the symptoms, age, etc.
By selecting 8 and playing back, an image controlled to have appropriate training content is provided as appropriate.

Next, the control procedure of the diopter and the brightness of the image will be described with reference to the flowchart shown in FIG.

That is, in step # 252, C
The PU 42 drives the motor 49 via the motor drive circuit 48 to switch the LCD panels 30L and 30R to the switch 126.
Return to the position where is and reset to the initial position. Then, in step # 254, the CPU 42 turns on the lamps 22L and 22R via the backlight control circuit 50. Then, in step # 256, the CPU 4
2 reads the diopter signal from the signal processing circuit 40, and converts the diopter signal into the target position pulse number in step # 258.

At step # 260, it is determined whether or not the current position pulse number of the LCD panels 30L and 30R matches the target position pulse number.

If they do not match, in step # 264, the magnitude of the current position pulse number and the target position pulse number are compared.

If the current position pulse number is smaller than the target position pulse number, in step # 266, the motor 4
9 is driven in the forward direction to move the LCD panels 30L and 30R forward. Then, in step # 268, the number of current position pulses is increased.

On the other hand, when the current position pulse number is larger than the target position pulse number, in step # 270,
The motor 49 is driven in the negative direction, and the LCD panels 30L, 3
Move 0R backward. Then, in step # 272, the current position pulse number is decreased.

If the current position pulse count and the target position pulse count match, the CPU 42 stops the motor 49 in step # 262.

After executing the predetermined steps of steps # 260 to 272 according to the number of current position pulses and the number of target position pulses, in step # 274, the CPU 42
Reads the lamp brightness signal and the blinking mode signal from the signal processing circuit 40, and controls the brightness of the lamps 22L and 22R via the backlight control circuit 50.

Then, in step # 276, it is determined whether or not the blinking mode is set. The blinking mode is shown in Figure 1.
In this mode, the illuminance is changed to give a stimulus to the iris as shown in 5.

If the mode is not the blinking mode, step # 256
Return to

On the other hand, if it is the blinking mode, step # 2
At 78, the number of target position pulses is set to the number of pulses corresponding to the position where the diopter is 0 diopters. Then, in step # 280, the duty ratio is switched, and the process returns to step # 260.

In the above construction, in the blinking mode, the image is always formed at infinity. Therefore, effective movement of the iris can be performed without error.

In the configuration of the first embodiment described above,
By relating the display contents of the background and the targets 38L, 38R so that the targets 38L, 38R have a specific character and changing the targets 38L, 38R three-dimensionally, For example, the movements of the optotypes 38L and 38R with respect to the background can be given a sense of reality, narrativeness, and unexpectedness so as to continuously attract the trainee's interest.

Therefore, the visual acuity recovery training apparatus 10 according to the first embodiment can enhance the training effect by allowing the trainee to view the image without getting tired.

Next, a second embodiment further including means for determining and displaying the degree of achievement of training will be described with reference to FIGS. FIG. 24 is a main part configuration diagram, FIG. 25 is a block diagram, and FIG. 26 is a flowchart diagram. Since the configuration of the second embodiment is basically the same as that of the first embodiment, only the differences will be described below.

First, the structure will be described.

That is, the display unit 120 in the apparatus body 20 is different from that of the first embodiment, as shown in FIG.
Left and right pair of LCD panels 30L and 30R and eyepiece 3
Half mirrors 90L and 90R are provided between the two 2L and 32R, respectively, and a pair of CCD cameras 90L and 90R are provided so that reflected images from the half mirrors 90L and 90R can be captured.
With 90R.

The left and right CCD cameras 90L and 90R are connected to the image processing circuit 94 as shown in the block diagram of FIG. The image processing circuit 94 is connected to the control microcomputer 96. The diopter position information from the signal processing circuit 40 is also input to the control microcomputer 96. The control microcomputer 96
It is connected to the score display means 98.

Next, the operation of the above configuration will be described.

That is, the CCD cameras 90L and 90R pick up images of the eyes 2L and 2R, and the video signal is an image processing circuit 94.
Sent to The image processing circuit 94, based on the video signal,
The pupil positions of the eyes 2L and 2R are detected. Information on the detected pupil position, that is, pupil position information, is stored in the control microcomputer 9
Sent to 6.

The control microcomputer 96 calculates the gaze direction from the pupil position information. Then, based on the target position information from the signal processing circuit 40, the shift amount of the gaze direction with respect to the target is calculated. Then, the quality of the gaze direction is determined depending on whether or not this deviation amount is within a predetermined range. That is, when the eyeballs 2L and 2R can follow the movement of the targets 38L and 38R, the gaze direction is determined to be in a good state.

This judgment is repeated a predetermined number of times, and the number of times a good judgment is made is counted. The count value is sent to the display means 98. The display means 98 displays the sent count value. For example, the number of times of determination is 1000, and the count value is displayed with the last digit of the number of times of good determination as the decimal point, so that the ratio of good determination can be displayed with 100 points.

Next, the procedure of the above operation will be further described with reference to the flow chart shown in FIG.

That is, the count value N is set to 0 in step # 302. Then, in step # 304, the control microcomputer 96 determines whether the shift amount in the gaze direction is within the predetermined range based on the pupil position information from the image processing circuit 94 and the target position information from the signal processing circuit 40. , The quality of the gaze direction is determined. If the determination is good, the count value N is incremented by 1 in step # 306.
If it is not a good judgment, without changing the count value N,
Then, the process proceeds to next Step # 308.

In step # 308, the process waits for 1/1000 of the total training time. This causes the pupil position to be sampled 1000 times at regular intervals during the entire training time. Then, in step # 310, whether the training is completed, that is, 1
Judge whether or not the number of times reaches 000 times. If not completed, the process returns to step # 304. On the other hand, if the training is completed, in step # 312, the control microcomputer 96
The count value N is displayed on the display means 98.

With the above structure, the trainee can use the targets 38L, 3
It can be determined whether or not 8R can be followed. Furthermore, the achievement level of the eyesight recovery training can be evaluated at the same time as the completion of the training.

The present invention is not limited to the above embodiments and can be implemented in various other modes.

For example, in order to change the optical distance of the optotypes 38L and 38R, the LCD panels 30L and 30R may be fixed to the main body 20 and the eyepieces 32L and 32R may be moved, or the LCD panels may be moved. 30L, 3
Both the 0R and the eyepieces 32L and 32R may be moved, or further, the optical characteristics of the eyepieces 32L and 32R, for example, the focal length may be changed. Targets 38L and 38R to change the brightness of the image
An appropriate filter may be arranged between the eyeballs 2L and 2R. Also, the moving image and the control signal may be provided by another recording medium such as a laser disc, a CD, and a VD. Alternatively, an image and sound may be generated by the computer as needed. Further, the content of the displayed image, the control pattern, and the like can be arbitrarily configured. Furthermore, this device can be used for other purposes such as improving visual acuity as well as recovering visual acuity.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a visual acuity recovery training device according to a first embodiment of the present invention.

FIG. 2 is a principle diagram of image display of the visual acuity recovery training device of FIG.

FIG. 3 is a display example of an image of the visual acuity recovery training device of FIG.

4 is a block diagram of the visual acuity recovery training device of FIG. 1. FIG.

5 is a flowchart of a control sequence of the visual acuity recovery training device of FIG.

6 is a waveform diagram of a video signal of the visual acuity recovery training device of FIG.

FIG. 7 is a configuration diagram of image display of the visual acuity recovery training device of FIG. 1.

8 is a waveform diagram of an image signal of the visual acuity recovery training device of FIG.

9 is a detailed circuit diagram of a signal processing circuit of the visual acuity recovery training device of FIG.

FIG. 10 is a timing chart of signal processing.

FIG. 11 is an exploded perspective view of the main body of the visual acuity recovery training device of FIG.

12 is a perspective view of an essential part of FIG.

FIG. 13 is an explanatory diagram of an image display control method.

FIG. 14 is an explanatory diagram of an image display control method.

FIG. 15 is an explanatory diagram of an image display control method.

FIG. 16 is a control pattern diagram of an image in the case of pseudo myopia.

FIG. 17 is a control pattern diagram of an image in the case of presbyopia.

FIG. 18 is a control pattern diagram in the case of nearsightedness or farsightedness.

FIG. 19 is a control flowchart of image display.

[Fig. 20] Fig. 20 is an explanatory diagram of an image display method for providing parallax.

FIG. 21 is an explanatory diagram of an image display method that gives congestion.

FIG. 22 is an explanatory diagram of another image display method that causes congestion.

23 is an explanatory diagram of an image formed by the method of FIG.

FIG. 24 is a main part configuration diagram of another embodiment of the present invention.

FIG. 25 is a block diagram of another embodiment of the present invention.

FIG. 26 is a flow chart diagram of another embodiment of the present invention.

[Explanation of symbols]

2L, 2R Eyeballs 10 Visual recovery training device 12 Video deck (external storage / playback means) 12a Video tape insertion part 12b Video tape playback part 14 Headphones (sound supply means) 16 Video tape (moving speed changing means, external storage means) 18 Video Tape (moving speed changing means, external storage means) 20 Device body 21 Tripod 22L, 22R Lamp 24L, 24R Reflector 26L, 26R Diffuser 28 Light-shield 30L, 30R LCD panel (target display, background display, common screen) ) 31 arrow 32L, 32R eyepiece (eyepiece optical system) 33L, 33R line of sight 34 image 35L, 35R arrow 36F, 36N visual target 37 intersection point 38L, 38R visual target 39L, 39R visual target position 40 signal processing circuit 40L left image signal system 40R right image signal system 40T timing control system 40S control signal system 41a / D converter 41b Memory 41c D / A converter 41d Changeover switch 41e Timing control circuit 42 CPU 44L, 44R LCD drive circuit 46 Start switch 48 Motor drive circuit 49 Motor 50 Backlight control circuit 52 Power unit 53 Video signal 54 Sync signal 55 Frame signal 56L, 56R Field signal 57L, 57R LCD drive signal 58L, 58R Control signal (operation control signal) 60L, 60R LCD display frame 62L, 62R Screen frame 64 Display concealment unit 70L, 70R Image 90L, 90R CCD camera 92L, 92R Half mirror 94 Image processing circuit 96 Control microcomputer 98 Point display unit 102 Upper cover 103 Switch hole 104 Switch cover 106 Lower cover 108 Tripod seat 110 AC unit 112 Video input terminal 14 printed circuit board 120 display unit 122 display unit base plate 123 upper wall 124 lamp holder mounting plate 125 front end 126 switch 127 rear wall 130 lamp holder 132 arrow 133 lamp mounting plate 134 arrow 140 motor unit (first target moving means, common screen) Moving means) 142 Drive shaft 150 LCD holder 151 Slide shaft 152 LCD holding plate 153 Slide guide part 154 Protrusion 160 Lens holder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuaki Horimoto 2-3-3 Azuchi-cho, Chuo-ku, Osaka-shi, Osaka, Osaka International Building Minolta Co., Ltd. (72) Inventor Kazuo Kimura Azuchi-cho, Chuo-ku, Osaka-shi, Osaka 2-33 Osaka International Building Minolta Co., Ltd. (72) Inventor Kenji Ishibashi 2-33 Azuchicho, Chuo-ku, Osaka City, Osaka Prefecture Osaka International Building Minolta Co. (72) Inventor Makoto Kamiya Osaka Prefecture 2-13-13 Azuchi-cho, Chuo-ku, Osaka City Minolta Co., Ltd., Osaka International Building (72) Inventor Yasushi Tanijiri 2-3-3 Azuchi-cho, Chuo-ku, Osaka City, Osaka City (72) In Minolta Co., Ltd. (72) Inventor Yasumasa Sugihara 2-3-13 Azuchi-cho, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta Co., Ltd.

Claims (11)

[Claims] 1. A visual acuity recovery training capable of performing visual acuity recovery training by viewing an image (70L, 70R) including an optotype (38L, 38R) and a background through an eyepiece optical system (32R, 32L). In the training device (10), the optotype display means (30) for displaying the optotypes (38L, 38R).
L, 30R), the background display means (30L, 30R) for displaying the background, and the eye (2L, 2R) gazing at the target (38L, 38R) and the target (38L, 38R). The first target moving means (1) for optically changing the optical distance (L) of the eye to a long distance or a short distance substantially along the optical axis direction of the eyepiece optical system (32R, 32L).
40) and the above target (38L, 38R) to the eyepiece optical system (32R, 32L)
A second visual acuity moving means for moving up and down and left and right in a direction substantially perpendicular to the optical axis direction of the visual acuity recovery training device. 2. A visual acuity recovery training capable of performing visual acuity recovery training by viewing an image (70L, 70R) including an optotype (38L, 38R) and a background through an eyepiece optical system (32R, 32L). In the training device (10), the optotype display means (30) for displaying the optotypes (38L, 38R).
L, 30R), the background display means (30L, 30R) for displaying the background, and the eye (2L, 2R) gazing at the target (38L, 38R) and the target (38L, 38R). The first target moving means (1) for optically changing the optical distance (L) of the eye to a long distance or a short distance substantially along the optical axis direction of the eyepiece optical system (32R, 32L).
40) and a visual acuity recovery training device. 3. A common screen (30) for the optotype display means (30L, 30R) and the background display means (30L, 30R).
L, 30R), and said visual target (38L, 38R) and said background are projected on said common screen (30L, 30R), The visual acuity recovery training device according to claim 1 or 2 characterized by the above-mentioned. 4. The common screen (30L, 30R) is LC
The visual acuity recovery training device according to claim 3, which is a D panel (30L, 30R). 5. The first target moving means (140) comprises common screen moving means (140) for moving the common screen (30L, 30R) substantially along the optical axis direction. The visual acuity recovery training device according to claim 3 or 4. 6. The optotype display means (30L, 30R) and the background display means (30L, 30R) display the optotypes (38L, 38R) and the background separately on the right and left sides, and the optical distance ( The visual acuity recovery training device according to any one of claims 1 to 5, wherein at least one of parallax, vergence, and the size of the target is changed according to the change of L). 7. The first optotype moving means (140) and / or the second optotype moving means are the optotypes (38L, 38).
R) moving speed changing means for changing the moving speed of the target (1)
6, 18) is further provided.
The visual acuity recovery training device according to any one of 6 above. 8. The target moving speed changing means is the first
The first target moving means (140) determines the moving speed of the target (38L, 38R) when the target moving means changes the optical distance (L) from short distance to long distance. distance
The above target (3) when changing (L) from a long distance to a short distance
8. The visual acuity recovery training device according to claim 7, which is slower than a moving speed of 8 L, 38 R). 9. An image of the optotypes (38L, 38R) displayed by the optotype display means (30L, 30R), and an image of the background displayed by the background display means (30L, 30R),
At least one of the operation patterns for operating the second target moving means is stored as a moving image, while the operation pattern for operating the first target moving means (140) is stored as an operation control signal (58L, 58R). External storage means (1
6, 18) and an external storage reproduction means (12) for reproducing the moving image and the operation control signals (58L, 58R) stored in the external storage means (16, 18). The visual acuity recovery training device according to any one of claims 1, 3 to 8. 10. At least one of the image of the optotypes (38L, 38R) displayed by the optotype display means (30L, 30R) and the image of the background displayed by the background display means (30L, 30R). Is stored as a moving image, while the first
External storage means (1) for storing an operation pattern for operating the target moving means (140) as operation control signals (58L, 58R)
6, 18) and an external storage reproducing means (12) for reproducing the moving image and the operation control signal stored in the external storage means (16, 18).
9. The visual acuity recovery training device according to claim 2, further comprising: 11. The external storage means (16, 18) further stores a voice, and a voice supply means (14) for supplying the trainee with the voice reproduced by the external storage reproduction means (12). The visual acuity recovery training device according to claim 9 or 10, further comprising: