JP2008036086A - Eye training device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily confirm the result of training for recovery of vision. <P>SOLUTION: The training for recovery of vision is performed by making display devices 4L and 4R display prescribed images which have to be watched through right and left eye-pieces 11 and 12 and making a position changing device 10 move the prescribed images relatively with respect to the eye-pieces 11 and 12. After the training, the recovery of vision is tested by making the display devices 4L and 4R display images for an eye test in stead of the prescribed images. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an eye training apparatus used for training aimed at restoring visual acuity and eye fatigue.

  Conventionally, as this type of eye training apparatus, left and right eyepiece lenses, one image display unit that displays an image for eye training, and an optical system that guides light from the image display unit to the left and right eyepieces There are some which include a position changing unit that changes the position of the image of the image display unit that the user is viewing in a predetermined direction (optical axis direction or convergence direction) (see the following patent document). The position changing unit is disposed on the optical path connecting the optical system and the eyepiece.

The movement of the ciliary muscles of the user can be promoted by changing the position of the image on the image display unit that the user is viewing through the left and right eyepieces.
JP-A-2005-334134

  The eye training apparatus can only perform training aimed at recovery of visual acuity and the like, and the result of training (degree of visual recovery, etc.) could not be confirmed.

  In order to confirm this, it is necessary to perform a visual acuity test at different locations and times. However, since it is complicated for the user, it is practically difficult to easily confirm the result of training.

  The present invention has been made in view of such circumstances, and an object thereof is to make it possible to easily confirm the result of eye training for the purpose of eyesight recovery or the like.

  In order to solve the above-described problems, an eye training apparatus of the present invention stores display means for displaying a predetermined image for eye training to be viewed through an eyepiece, and a plurality of types of images for eyesight examination. It is characterized by comprising storage means and display control means for causing the display means to display a vision test image instead of the predetermined image.

  According to the present invention, it is possible to easily confirm the result of eye training for the purpose of eyesight recovery or the like.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a conceptual diagram showing the configuration of an eye training apparatus according to a first embodiment of the present invention, FIG. 2 is a plan view of the eye training apparatus shown in FIG. 1, and FIG. 3 is a plane showing an example of a vision test image. FIGS. 4A and 4B are diagrams showing another example of an image for eyesight inspection.

  As shown in FIG. 1, the eye training apparatus 1 displays an image of a first left eyepiece (eyepiece) 2, a first right eyepiece (eyepiece) 3, and an eye training target. Two display devices (display means) 4L and 4R and a position changing device (moving means) 10 are provided.

  The left display device 4L is located on the optical axis of the first left eyepiece 2. The right display device 4R is located on the optical axis of the first right eyepiece 3. For example, small liquid crystal displays are used as the display devices 4L and 4R.

  The position changing device 10 is provided between the left and right display devices 4L and 4R and the first left and right eyepieces 2 and 3, and the positions of the images of the display devices 4L and 4R viewed by the user are displayed on the user's eyes. Change to the optical axis direction and the convergence direction.

  The position changing device 10 includes a second left eyepiece lens (eyepiece lens) 11, a second right eyepiece lens (eyepiece lens) 12, a left exterior portion 13, a right exterior portion 14, and an exterior portion 19. The second left eyepiece 11 is accommodated in the left exterior part 13. The second right eyepiece lens 12 is accommodated in the right exterior portion 14. The left exterior part 13 and the right exterior part 14 are accommodated in the exterior part 19 so as to be movable in the longitudinal direction. A left cam pin 15 is attached to the left exterior part 13, and a right cam pin 16 is attached to the right exterior part 14. The left cam pin 15 engages with a cam groove 17 formed in the housing 1a of the eye training apparatus 1 and is guided in the direction of arrow b in FIG. The right cam pin 16 engages with a cam groove 18 formed in the housing 1a of the eye training apparatus 1 and is guided in the direction of arrow c in FIG.

  Guide bars 25 and 26 are attached to the exterior portion 19. The guide bars 25 and 26 extend in the optical axis direction a of the first left and right eyepieces 2 and 3. The guide bars 25 and 26 are supported by bearings 27 so as to be movable in the optical axis direction a. When the exterior portion 19 moves in the optical axis direction a, the second left and right objective lenses 11 and 12 move along the directions of arrows b and c. Thus, since the positions of the second left and right objective lenses 11 and 12 in the optical axis direction a are shifted, the second left and right eyepiece lenses 11 and 12 constitute a shift lens.

  The positions of the second left and right eyepieces 11 and 12 are detected by the positional relationship between the Hall elements 21A to 21C and a magnet (not shown). In FIG. 1, the positions where the second left and right eyepieces 2 and 3 are indicated by solid lines are the initial positions (initial positions) of the second left and right eyepieces 11 and 12, and are indicated by broken lines before and after that. The position shown is the limit position of the second left and right eyepieces 11 and 12.

  In this way, by moving the second left and right eyepiece lenses 11 and 12, images displayed on the display devices 4L and 4R viewed by the user through the first left and right eyepiece lenses 2 and 3 are displayed. Can be moved in the optical axis direction a and the convergence directions b and c.

  Further, the eye training apparatus 1 has a control circuit 22. The position changing device 10 is disposed below the control circuit 22. The position changing device 10 includes a position control unit (not shown) for controlling the positions of the second left and right eyepieces 11 and 12, and display devices 4L and 4R in place of images for eyesight recovery training (predetermined images). And a display control unit 102 for displaying a vision test image. The position control unit detects the state of the Hall elements 21 </ b> A to 21 </ b> C and controls driving of the driving unit 20 of the position changing device 10.

  The display control unit 102 includes a memory 102a. The memory 102a stores a plurality of eye training images (predetermined images) and a plurality of visual examination images (see FIGS. 3 and 4). The display control unit 102 selects a specific vision test image from a plurality of vision test images stored in the memory 102a, and this specific vision test image is displayed instead of the eye training image after eye training. Display on 4L, 4R. The plurality of visual acuity test images include a pre-training visual acuity test image for a visual acuity test that is performed before eye training.

  As shown in FIG. 2, a power button 31 for turning on / off the power, a start button 32 for starting / stopping vision recovery training, a mode button 33 for selecting a display screen, etc., and eye training are provided on the upper surface of the housing 1a. A button 34 for turning on / off the display of the image for use and a display device 35 are provided.

  Next, the operation of the eye training apparatus 1 will be described.

  When the power button 31 is pressed to turn on the power and the start button 32 is pressed, the second left and right eyepiece lenses 11 and 12 reciprocate along the optical axis direction a (movements that move toward and away from the user). At the same time, the display devices 4L and 4R move toward and away from each other in the left-right direction (movement in the direction of convergence) (the images of the display devices 4L and 4R appear as one).

  The image moves in the forward / backward (perspective) direction and the convergence direction so that it is out of focus, but the eye recovery training is performed by chasing the image with the eye for a predetermined time so that the image is not out of focus. (However, there are differences in the effectiveness of recovery training depending on age and individual differences.)

  When the button 34 is pressed before the vision recovery training, the vision test image (pre-training vision test image) is turned on / off. This visual acuity test image (for example, the images shown in FIGS. 3 and 4) confirms the visual acuity before visual acuity recovery training.

  Further, the display of the eye test image before the vision recovery training may be automatically displayed in conjunction with the operation of turning on the power supply for starting the vision recovery training.

  When the button 34 is pressed after the vision recovery training, the vision test image is automatically turned on / off again. The visual acuity after the visual acuity recovery training is confirmed from this visual examination image (for example, the images shown in FIGS. 3 and 4).

  Then, the effect of the visual acuity recovery training is confirmed based on the difference in visual acuity before and after the visual acuity recovery training (for example, to which column in the images of FIGS. 3 and 4 can be distinguished).

  Display of the image for eyesight inspection after training may be performed by pressing the button 34 of the user.

  All or part of display contents (for example, the direction of the mark indicated by the arrows in FIGS. 3 and 4) of the vision test image in the vision test image before the vision recovery training and the vision test image after the vision recovery training Varies randomly by the control circuit 22. By doing so, it is possible to eliminate the adverse effect of inaccuracy in the visual acuity test by storing the display content of the visual acuity test image confirmed before the visual acuity recovery training.

  In addition, in order to be able to cope with individual differences (age, visual acuity difference, fatigue condition), the mode button 33 is used to select the type of image for eye test (symbol, character, pattern, etc.), background brightness, display color, visual acuity, etc. It is possible to select recovery training time (short: 2 minutes, standard: 5 minutes, long: 10 minutes, etc.) and the presence / absence of chimes that indicate the progress of the training time. What is selected can be confirmed on the display device 35.

  As described above, the visual acuity recovery effect of the eye training device can be easily confirmed by confirming the visual acuity with the visual acuity test image before and after the visual acuity recovery training.

  Further, the inaccuracy of the inspection due to storing the image for visual acuity inspection can be removed.

FIG. 5 is a conceptual diagram showing the configuration of an eye training apparatus according to the second embodiment of the present invention.
It is.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences will be described below.

  In the eye training apparatus 1 according to the first embodiment, the second left and right eyepiece lenses 11 and 12 are moved in the optical axis direction a and the convergence direction. However, as shown in FIG. In the eye training apparatus 201, the display devices 204L and 204R are moved in the optical axis direction a, and the second left and right eyepieces 211 and 212 are fixed.

  The display devices 204L and 204R are accommodated in the exterior portion 219 so as to be movable in the longitudinal direction. Guide bars 225 and 226 are attached to the exterior portion 219. The guide bars 225 and 226 extend in the optical axis direction a of the first left and right eyepieces 2 and 3. The guide bars 225 and 226 are supported by bearings 227 so as to be movable in the optical axis direction a.

  The eye training device 201 includes a cam mechanism (not shown) for moving the display devices 204L and 204R in the convergence direction, as in the first embodiment.

  The exterior part 219 is driven in the optical axis direction a by the drive part 220 of the position changing device 210.

  According to the second embodiment, the same effect as that of the first embodiment can be obtained.

FIG. 6 is a conceptual diagram showing the configuration of an eye training apparatus according to the third embodiment of the present invention.
It is.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences will be described below.

  Although the eye training device 1 of the first embodiment includes two display devices 4L and 4R, the eye training device 301 of the third embodiment includes only one display device 304.

  In the third embodiment, the left and right reflecting mirrors 5 and 6, the center reflecting mirror 7, and the half mirror are used for branching and guiding the image displayed on the display device 304 to the first left and right eyepieces 2 and 3. 8 is provided. A dummy glass 9 is disposed between the left reflecting mirror 5 and the first left eyepiece 2. The dummy glass 9 is an optical element for making the optical path length from the display device 304 to the first left eyepiece lens 2 equal to the optical path length from the display device 304 to the first right eyepiece lens 3.

  According to the third embodiment, the same effect as that of the first embodiment can be obtained, and one expensive display device can be omitted, so that the manufacturing cost can be reduced accordingly.

  In the above-described embodiment, the image on the display device can be moved in the front-rear (perspective) direction and the convergence direction. However, the image may be moved only in the front-rear direction, or the image may be moved only in the convergence direction. Good.

  The eye training devices 1, 201, and 301 of the above-described embodiments include the first and second left eyepieces 2 and 11, and the first and second right eyepieces 3 and 12, Only the first and second eyepieces may be used.

  Note that the first left and right eyepieces 2 and 3 may be omitted.

  In addition, it is not always necessary to display and display an image for eyesight inspection before the eyesight recovery training.

  In the case where the image for vision test is displayed before and after the vision recovery training, the image for vision test displayed after the vision recovery training is not necessarily different from the image for vision test displayed before the vision recovery training.

  In the first embodiment, all of the display contents of the vision test image are randomly changed by the control circuit 22, but part of the display contents of the vision test image is randomly changed by the control circuit 22. It may be changed.

  In addition, instead of changing the display content of the vision test image, a control circuit includes a memory (storage means) that stores a plurality of types of vision test images (a plurality of vision test images are prepared for each type). 22 may be changed in units of image for eyesight inspection.

  In this case, it is preferable to select a vision test image at random by the control circuit 22 from a plurality of types of vision test images stored in the memory.

FIG. 1 is a conceptual diagram showing the configuration of an eye training apparatus according to the first embodiment of the present invention. FIG. 2 is a plan view of the eye training apparatus shown in FIG. FIG. 3 is a plan view showing an example of a visual acuity test image. FIG. 4 is a diagram showing another example of an image for eyesight inspection. FIG. 5 is a conceptual diagram showing the configuration of an eye training apparatus according to the second embodiment of the present invention. FIG. 6 is a conceptual diagram showing the configuration of an eye training apparatus according to the third embodiment of the present invention.

Explanation of symbols

  1, 201, 301: eye training device, 2: first left eyepiece, 3: first right eyepiece, 11: second left eyepiece, 12: second right eyepiece lens, 4L, 4R 204L, 204R, 304: display device (display means), 10, 210: position changing device (moving means), 22: control circuit, 102: display control unit, 102a: memory (storage means).

Claims (6)

Display means for displaying a predetermined image for training an eye to be viewed through an eyepiece;
Storage means for storing a plurality of types of images for visual examination;
An eye training apparatus comprising: display control means for causing the display means to display an image for eyesight examination instead of the predetermined image.   2. The eye training apparatus according to claim 1, wherein the display control means displays a pre-training visual acuity test image before the predetermined image is displayed on the display means.   The eye training apparatus according to claim 2, wherein the display control unit displays an image different from the eye test image displayed after eye training and the pre-training eye test image.   4. The eye training apparatus according to claim 3, wherein the display control means displays an image obtained by changing a part of the pre-training vision test image with respect to a vision test image displayed after eye training. .   The eye training apparatus according to claim 1, wherein the eye test image is selected at random from a plurality of types of the eye test images stored in the storage unit.   The eye training apparatus according to claim 1, further comprising a moving unit that moves the predetermined image in an optical axis direction of the eyepiece.

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