JP2007014394A - Eyesight restoration training device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an eyesight restoration training device allowing a trainee to perform the training with the visual axis always fixed. <P>SOLUTION: The eyesight restoration training device comprises a reflection part 5 for reflecting the image light from a display 3 for displaying an eyesight restoration training image, a carrier part 6 for changing the optical distance between an eyepiece part 2 where the eyes of the trainee are located and the reflection part 5, and a display control part for changing the display size of the eyesight restoration training image according to the optical distance. The direction of movement of the reflection part 5 and the optical axes of the incident light and the reflection light are parallel regardless of the optical distance and without changing the optical axis 9A of the incident light into the reflection part 5 or the optical axis 9B of the reflection light. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vision recovery training apparatus that trains an imaging adjustment function of an eye.

  The decrease in visual acuity is thought to be due to a decrease in the imaging function of the eye due to the accommodation tension and weakness of the eye's regulatory muscles (the ciliary muscles). You can expect. In this method, the ciliary muscle is activated by training, and the perspective adjustment function is activated to restore the visual acuity.

It has been proposed to improve visual acuity, particularly pseudomyopia and presbyopia, using the above method (see, for example, Patent Document 1). That is, a target moving means for moving the target at an appropriate speed between a target that can be viewed from the eyepiece and that can display an appropriate graphic, and a far point and a near point that are at a predetermined distance from the eyepiece, respectively. And a visual acuity improving apparatus that includes a display unit that changes the size of a graphic displayed on the target in proportion to the distance between the target and the eyepiece. In this apparatus, a reflecting surface such as a plane mirror is provided so that the surface on which the target graphic is displayed faces in the same direction as the eyepiece, and faces the target and the eyepiece. The reflecting means is fixed to the pedestal and is moved between two predetermined points by the conveying means. The light emitted from the target is reflected by the reflecting means and enters the eyepiece. With such a configuration, it is possible to reduce the depth of the apparatus and reduce the size while securing a predetermined far point with respect to the distance from the target to the eyepiece.
International Publication No. 2004/066900 Pamphlet

  However, in the visual acuity recovery apparatus as described above, a plane mirror is used as the reflecting means. However, when the user views the target reflected by the plane mirror from the eyepiece, the line of sight is moved up and down as the plane mirror moves. Need to be made. Forcing the user to perform eye movements that are not suitable for the original purpose may induce fatigue and lack of concentration due to an increase in the burden on the user, and may reduce the visual improvement effect.

  The present invention has been made in view of the above-described conventional circumstances, and an object thereof is to provide a visual acuity recovery training apparatus capable of performing training in a state in which a trainee always fixes a line of sight with a small configuration. To do.

  The visual acuity recovery training device according to the present invention is a visual acuity recovery training device that trains the imaging adjustment function of the eye, and includes a display unit that displays an image for visual acuity training and a reflection unit that reflects image light from the display unit A moving unit that changes an optical distance between a trainee's eye position and the reflecting unit, and a display control unit that changes a display size of the vision training image according to the optical distance, and the optical distance. Regardless of whether the optical axis of the incident light to the reflective part and the optical axis of the reflected light do not change, the moving direction of the reflective part and the optical axis of the incident light and reflected light are parallel. Have.

  According to the above configuration, since the optical axis does not change regardless of the optical distance between the trainee's eye position and the reflecting portion, the trainer always trains with the eyesight fixed with a small-sized vision recovery training device. It can be carried out.

  In the visual acuity recovery training apparatus according to the present invention, the reflecting portion is constituted by a plurality of plane mirrors.

  According to the present invention, since the optical axis does not change regardless of the optical distance between the trainee's eye position and the reflecting portion, the trainer always trains with the eyesight fixed in a small-sized vision recovery training device. It can be carried out.

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

(First embodiment)
FIG. 1 is a cross-sectional view showing the configuration of the visual acuity recovery training device according to the first embodiment, and shows a state where an image for visual acuity training described later is located at a far point.

  This visual acuity recovery training apparatus has an eyepiece 2 on the side surface of a housing 1, a display 3 that displays an image for visual acuity training inside, and two plane mirrors that reflect image light from the display 3. A reflecting unit 5 composed of 4A and 4B and a transport unit (moving unit) 6 that changes the optical distance (optical path length) between the eyepiece unit 2 and the reflecting unit 5 where the trainee's eyes are located are provided. The vision recovery training apparatus is provided with a control unit 8 that constitutes a display control unit that controls the motor 7 that drives the transport unit 6 and changes the display size of the image for vision training according to the optical distance. ing. Regardless of the optical distance, the optical axis 9A of the incident light and the optical axis 9B of the reflected light to the reflecting unit 5 are not changed, and the moving direction of the reflecting unit 5 and the optical axes of the incident light and the reflected light are not changed. 9A and 9B are configured to be parallel to each other.

  The reflection unit 5 is fixed to a pedestal 10, and the pedestal 10 is mounted on a conveyance unit 6 including a pulley 11 and a belt. The pulley 11 is driven by a motor 7 to move the reflecting portion 5. The optical distance between the eyepiece unit 2 and the display unit 3 can be changed by moving the reflecting unit 5 in the left-right direction in FIG. Further, the transport unit 6, the pulley 11, and the like may be covered with the floor 12, and the entire vision recovery training device may be accommodated in the housing 1.

  The display unit 3 is fixed to a floor 12 provided in the housing 1. The display unit 3 is configured by an electrical display device such as a liquid crystal display, a CRT display, an organic EL display, etc., and can easily change the type, size, color, background color, and the like of figures and characters to a desired state. It is possible to display moving images.

  In FIG. 1, the dotted line connecting the eyepiece unit 2 and the display unit 3 indicates the optical axis, but the image for visual acuity training displayed on the display unit 3 travels along this optical axis, and the user reflects it. The image reflected by the unit 5 is seen. The reflecting part 5 is constituted by two plane mirrors 4A and 4B, and the optical axis 9A connecting the display part 3 and the reflecting part 5 and the optical axis 9B connecting the eyepiece part 2 and the reflecting part 5 are parallel as described above. It is comprised so that. In order to make these optical axes parallel, it is desirable that the plane mirrors 4A and 4B have an angle fine adjustment function (not shown).

  In the visual acuity recovery training apparatus configured as described above, the user focuses on the eyepiece 2 and performs visual acuity improvement training by looking at visual training images such as graphics and characters displayed on the display 3. . The eyepiece 2 is preferably sized so that the user can look into it with both eyes, but has one that is large enough to be seen with one eye, and the user performs eyesight improvement training for each eye. It doesn't matter if you do. It is also possible to have two things that are large enough to be viewed with one eye, and perform eyesight improvement training for both eyes simultaneously, or shield one eye for one eye training.

  In addition, the locus of movement of the reflecting unit 5 generated by the transport unit 6 is parallel to the optical axis 9A and the optical axis 9B, but this allows the optical axis to be fixed even if the reflecting unit 5 moves. Thus, the user can fix the line of sight. At that time, it is important that the locus of the reflecting portion 5 and the optical axis 9B are parallel to each other, and the optical axis 9A may not be parallel to the locus of the optical axis 9B and the reflecting portion 5. However, in this case, it is necessary to dynamically control the angles of the plane mirrors 4A and 4B with the movement of the reflecting portion 5. This makes it possible to make the trajectory of the reflecting portion 5 parallel to the optical axis 9B, but complicates the apparatus configuration and control.

  The operations of the display unit 3 and the motor 7 are controlled by the control unit 8, and one specific example of this control will be described. When the reflection unit 5 approaches the eyepiece unit 2, an image such as a figure or a character displayed on the display unit 3 is gradually reduced. On the contrary, when the reflection unit 5 moves away from the eyepiece unit 2, the image is displayed. To gradually increase. In addition, the display of the image is stopped simultaneously with the stop of the reflecting portion 5. By such control, the apparent image size for the user can be made constant.

  Here, the optical distance between the eyepiece unit 2 where the trainee's eyes are located and the vision training image on the display unit 3 can be changed by the transport unit 6, but in the present embodiment, the trainer's eyes According to the optical distance between the position (the eyepiece unit 2) and the position of the display unit 3 that displays the vision training image, the vision training image is projected on the retina of the trainer's eye with a certain size. The display size of the vision training image is changed.

  As described above, according to the visual acuity recovery training device of the present embodiment, since the optical axis does not change regardless of the optical distance between the trainee's eye position and the reflecting portion 5, the trainee always keeps his line of sight fixed. Training can be done at. Therefore, it is possible to reduce the burden and fatigue on the trainee and improve the visual acuity improvement effect.

  In the above example, the number of plane mirrors constituting the reflection unit 5 is two. However, if the locus of the reflection unit 5 is parallel to the optical axis 9A and the optical axis 9B, the number of the configuration mirrors is two. It is not limited to sheets. For example, the reflecting portion 5 may be configured by bending a single plane mirror. Further, the reflecting portion 5 may be a prism.

  Further, the eyepiece unit 2 may be provided with a lens to create a virtual image to reduce the depth and further reduce the size of the apparatus.

(Second Embodiment)
FIG. 2 is a cross-sectional view showing the configuration of the visual acuity recovery training apparatus according to the second embodiment, and shows a state where the display unit is located at a far point as in FIG. The same components as those in FIG. 1 are denoted by the same reference numerals.

  The visual acuity recovery training device of the present embodiment has an external configuration in which the horizontally long device of FIG. 1 shown in the first embodiment is vertically long. That is, the optical distance between the eyepiece unit 2 and the display unit 3 can be changed by moving the reflecting unit 5 in the vertical direction in FIG. And since the locus | trajectory of the reflection part 5, each of the optical axis 9A, and the optical axis 9B is parallel, an optical axis will be fixed and the user can fix a visual line. In addition, a plane mirror 21 is inserted between the eyepiece unit 2 and the reflection unit 5 so that the user can look into the apparatus from the side. The conveyance unit 6, the pulley 11, and the like may be covered with the wall 22, or the entire visual acuity improvement device may be accommodated in the housing 1.

  Even in the visual acuity recovery training apparatus shown in the present embodiment, the optical axis does not change regardless of the optical distance between the position of the trainee's eyes and the reflecting portion 5 in a small configuration, so the trainee always fixed his line of sight. Can be trained in the state. Also. In addition to having the advantage that the user can carry out visual acuity recovery training with the line of sight fixed and the size of the apparatus being reduced, the installation area of the apparatus can be further reduced.

  Since the optical axis does not change regardless of the optical distance between the trainee's eye position and the reflecting portion, the present invention is a small-sized eyesight recovery training device, and the trainer always trains with the line of sight fixed. It is useful for a visual acuity recovery training device or the like that trains the imaging adjustment function of the eye.

Sectional drawing which shows the structure of the visual acuity recovery training apparatus in the 1st Embodiment of this invention. Sectional drawing which shows the structure of the visual acuity recovery training apparatus in the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Eyepiece part 3 Display part 4A Plane mirror 4B Plane mirror 5 Reflection part 6 Conveyance part 7 Motor 8 Control part 9A Optical axis 9B Optical axis 10 Base 11 Pulley 12 Floor 21 Plane mirror 22 Wall

Claims (2)

A vision recovery training device that trains the imaging adjustment function of the eye,
A display unit for displaying a vision training image;
A reflection part for reflecting image light from the display part;
A moving unit that changes an optical distance between the trainee's eye position and the reflecting unit;
A display control unit that changes a display size of the vision training image according to the optical distance,
Regardless of the optical distance, the optical axis of the incident light and the optical axis of the reflected light are not changed, and the moving direction of the reflective part and the optical axes of the incident light and the reflected light are parallel. A vision recovery training device. The vision recovery training device according to claim 1,
The said reflection part is a visual acuity recovery training apparatus comprised with a some plane mirror.

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