JPH0576849B2 - - Google Patents

Description

[Detailed description of the invention]

【0001】

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subjective visual function testing device that includes an eye chart device and a reflection device.

【0002】

[Prior art] Conventional subjective methods for visual acuity, stereoscopic vision,
A visual function testing device for testing visual functions such as tropism is configured so that an eye chart is provided 3 m to 5 m in front of a subject for eye examination.

【0003】

[Problems to be Solved by the Invention] When performing eye examination using such a subjective visual function testing device, it is necessary to increase the line of sight distance of the examinee so as not to be affected by the accommodative power of the eyes. be.

[0004] For this reason, when using a conventional subjective visual function testing device, it is necessary to provide a large space for eye examination, but in optical shops and ophthalmology clinics with small floor space, it is necessary to secure a large space for eye examination. That was difficult.

[0005] Furthermore, it is desirable that such a subjective visual function testing device be stored when not in use to secure consulting space and the like.

[0006] Accordingly, an object of the present invention is to provide a visual function testing device that has a simple configuration and is capable of performing eye examination in a narrow space, and that can secure a consulting space and the like when the device is not in use.

【0007】

[Means for Solving the Problems] In order to solve the above object, the present invention provides a housing in which an opening for a reflection device storage section provided inside is provided on the surface;
a first reflecting device that is disposed inside the housing and reflects the light beam from the visual acuity chart device; and a first reflecting device that is supported by the housing by support means so as to be movable between the reflecting device storage section and the upper part of the housing; The visual function testing apparatus is characterized in that it includes a second reflecting device that reflects the light beam from the first reflecting device toward the subject's eyes when placed above the housing.

[0008]

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

[0009] In FIG. 1, on the top surface of the table 1, there is a CRT 2 for the examiner and a glass window 3, and next to the CRT 2 for the examiner is a keyboard 4 for operating the optotype.
There is.

[0010] In FIG. 1, 5 is a fifth reflecting mirror as a second reflecting device located above the glass window 3;
Reference numeral 6 denotes a mirror support arm (supporting means) disposed on one side of the table 1, 7 a first leg on the one side of the table 1, and 7a formed entirely within the first leg 7. A mirror storage chamber (reflector storage section); 7b is a lid that opens and closes the upper end opening of the mirror storage chamber 7a that opens on the top surface of the table 1; 8 is a second leg on the other side of the table 1; Department.

[0011] The above-mentioned mirror support arm 6 has a support section 6a that is configured to be extendable and retractable using a telescopic pipe (nesting tube), etc., and is attached to the upper end of the support section 6a so as to be horizontally rotatable in the direction of arrow A. The bent arm portion 6b is formed into a substantially L-shape. The support column 6a of the mirror support arm 6 is fixed to the bottom of the mirror storage chamber 7a. Furthermore, a mirror support member 9 is fixed to the tip of the bending arm portion 6b, and a fifth reflection mirror 5 is rotatable in the direction of arrow B at the bottom of the mirror support member 9 via angle adjustment devices 10, 10. Adjustably mounted. With this configuration, the fifth reflecting mirror 5 is stored in the first leg portion 7 of the table 1, that is, in the mirror storage chamber 7a, by the expansion and contraction of the mirror support arm 6 when not needed.

[0012] In FIG. 2, a mirror chamber 8a is formed throughout the second leg portion 8 of the table 1, and a CRT 21 for the subject (visual vision A reflecting mirror 22 is attached to the wall opposite to the display device. A second reflective mirror 23 is attached to a wall facing the first reflective mirror 22, and a third reflective mirror 24 is held at the center of the upper part of the mirror chamber 8a. Further, a fourth reflective mirror 25 is disposed below the glass window 3 on the top surface of the table 1. still,
The CRT 2 displays the same optotype as the CRT 21 and also displays test data.

[0013] The light flux emitted from the CRT 21 is reflected several times between the first and second reflection mirrors 22 and 23, and then reflected in the order of the third reflection mirror 24, the fourth reflection mirror 25, and the fifth reflection mirror 5. It is facing towards the front of table 1. In addition, such first, second, third, fourth reflecting mirrors 22, 23, 24, 2
5 constitutes a second reflection device.

[0014] Next, the operation of the visual function testing device having such a configuration will be explained.

[0015] CRT21 for the test subject and CRT for the examiner
2, identical optotypes formed by digital signals are displayed by operating the keyboard 8. After the light beam from the CRT 21 for the subject is reflected several times between the first reflection mirror 22 and the second reflection mirror 23, the direction of the light beam is changed by the third reflection mirror 24 toward the fourth reflection mirror 25. be changed to. This changed luminous flux passes through the glass window 3, is changed in direction forward by the fifth reflecting mirror 5, and enters the eye of the subject 26.

[0016] In this embodiment, when the eye examination is not performed, the fifth
The mirror support arm 6 with the reflective mirror 5 is placed inside the table 1, that is, in the mirror storage chamber 7a.
Since it can be stored as shown by the broken line in the figure, the consulting space and optometry space can be made into the same space.

[0017] Furthermore, by using a CRT as an eye chart device, the optotype is closer to hand than the conventional wall-mounted or projection type, making it easier to see the optotype, and it is also possible to produce a large number of images. Furthermore, this CRT is separate for the test subject and for the examiner, allowing the examiner to check visual targets at hand.

[0018] In this embodiment, the key lamps on the displayed keyboard may be turned on without using the CRT 2 for the examiner.

[0019] In another embodiment, an eye chart device is used.
Instead of a CRT, it may be constructed of a projector and a screen, or it may be constructed of a liquid crystal or a vision card. Note that if an eye refractive power testing device is attached to the second reflecting device described above, eye refractive power can also be tested.

【0020】

[Effects] According to the present invention as described above, by capturing the subject's line of sight into the device, the space for eye examination can be made smaller than in the past, and
When the device is not in use, the second reflecting device can be housed within the housing to ensure a consulting space in the upper part of the housing.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a visual function testing device showing one embodiment of the present invention.

FIG. 2 is a diagram showing the configuration and optical path of the first reflecting device in FIG. 1;

[Explanation of symbols]

1...Table (housing) 2...CRT for examiner 3...Glass window 5...Fifth reflecting mirror (second reflecting device) 6...Mirror support arm (support means) 7a...Mirror storage room (reflector storage section) 21... Subject's CRT (vision chart device) 22...First reflecting mirror (part of the first reflecting device) 23...Second reflecting mirror (part of the first reflecting device) 24...Third reflecting mirror (part of the first reflecting device) 25...Fourth reflecting mirror (part of the first reflecting device)

Claims (1)

[Claims] 1. A housing whose surface is provided with an opening for a reflection device housing provided therein; a first reflection device that is disposed inside the housing and reflects a luminous flux from an eye chart device; The reflector is supported by the housing by support means so as to be movable between the reflector housing and the upper part of the housing, and when placed in the upper part of the housing, directs the light beam from the first reflector to the subject's eye. A visual function testing device comprising: a second reflecting device that reflects toward the target.