JPH0838420A - Optometry device - Google Patents

Abstract

PURPOSE:To provide an optometry device capable of sufficiently securing the optical distance for optometry in a narrow place and capable of simply confirming the information necessary for optometry other than a target and unnecessary to be presented to a testee. CONSTITUTION:This optometry device is provided with a liquid crystal display panel (target display means) in a case 1 arranged at an interval from a testee via a table 2; a reflecting device reflecting the light beam from the liquid crystal panel many times, outputting it outward on the side of the case 1, and guiding it to the testee at the optometry position; and a liquid crystal display panel 14 (optometry information display means for tester) displaying at least a target as optometry information on the side face of the case 1 invisible from the testee at the optometry position of the table 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visual acuity test apparatus which can be used even in a narrow place where a linear distance required for a visual acuity test cannot be secured.

[0002]

2. Description of the Related Art A conventional visual function inspection apparatus for visually checking visual functions such as visual acuity, stereoscopic vision, and oblique position is such that an eye target is provided at a position 3-5 m in front of a subject. Is configured.

When performing an optometry using such a subjective visual function testing apparatus, it is necessary to increase the line-of-sight distance of the subject so as not to be influenced by the eye's accommodation power.

Therefore, when the conventional subjective visual function testing device is used, it is necessary to widen the space for the optometry. However, it has been difficult to secure a large space for optometry at an eyeglass store or an ophthalmology clinic with a small floor area.

Further, even when it is desired to equip a mobile medical vehicle such as a bus with a subjective visual function inspection device for local medical treatment, it is difficult to secure the above-mentioned distances 3 to 5 in a narrow vehicle compartment.

In order to solve such a problem, a multi-reflection type inspection device which secures an optical path length by using a reflecting device arranged in a table, a reflecting device arranged in a ceiling, and the like has been considered. There is.

[0007]

However, since the ceiling is low in a mobile medical vehicle or the like, even if the above-mentioned multi-reflection type inspection apparatus is applied to this vehicle, a sufficient optical path length is ensured for a visual acuity test. Was difficult.

On the other hand, the examiner can confirm the optotypes presented to the examinee and easily confirm the information other than the optotypes that is necessary for the optometry and does not have to be presented to the examinee. It is desirable to be able to.

Therefore, according to the present invention, it is possible to secure a sufficient optical distance for a visual acuity test even in such a narrow place, and it is not necessary to present it to the subject because it is information necessary for the optometry other than the optotype. It is an object of the present invention to provide a visual acuity test device that can easily check information.

[0010]

In order to achieve this object, the present invention is directed to an optometry table used for optometry of a subject, and is arranged with a space between the subject and the table. A housing, an optotype display means provided in the housing for displaying optotypes, and after reflecting the light flux from the optotype display means in the housing a number of times, toward the outside of the housing A visual acuity test apparatus including a reflecting device that emits light and guides the subject to the eye examination position, wherein at least the optotype is displayed as eye examination information on the housing invisible to the subject at the eye examination position of the table. The visual acuity test device is provided with an optometry information display means for a person.

[0011]

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

In FIGS. 1 to 3, reference numeral 1 is a housing, and 2 is a table disposed on the side of the housing 1. This housing 1
At the upper part of the side wall 1a of the support arm 3, a support arm 3 is provided with an arrow 4 around the base.
It is mounted so that it can rotate in any direction. An eye-refractive-power inspection device 5 is attached to the tip of the support arm 3.

As shown in FIGS. 3 and 4, a liquid crystal display panel 6 as a visual target display means is provided at one end of the bottom of the housing 1. Further, inside the housing 1, a first reflecting device 7 that reflects the light flux from the liquid crystal display panel 6 a number of times and then horizontally emits it to the side of the housing 1 is disposed.

The first reflecting device 7 includes a reflecting mirror 8 arranged in an upper portion of the housing 1, a reflecting mirror 9 arranged on the other end side of the bottom portion in the housing 1, and above the reflecting mirror 9. A reflection mirror 10 is provided. Then, the light flux 12 from the target 11 displayed on the liquid crystal display panel 6 is reflected by the reflection mirror 8,
A translucent window provided on the side wall 1a of the housing 1 by reflecting in the order of 9 and 10.
It can be emitted horizontally from 13.
Further, on the rear side wall 1b of the housing 1, a liquid crystal display panel 14 (optometry information display means for an examiner) displaying an optotype 11 'having the same content as the optotype 11 displayed on the liquid crystal display panel 6 is provided. It is provided to check the target.

In this embodiment, the first reflecting device 7 is composed of three reflecting mirrors 8, 9 and 10. However, the number of reflecting mirrors forming the first reflecting device 7 is not limited to this. Not a thing. Further, although the liquid crystal display panels 6 and 14 are used as the target display means, a CRT or the like may be used as the target display means.

Further, a side wall 1a of the housing 1 is formed with a slit 15 which is located below the light-transmitting window 13 and extends vertically, and the base of a mirror arm 16 is inserted through the slit 15. The mirror arm 16 is driven up and down in the slit 15 by a pulse motor (not shown).
A reflection mirror 17 is attached to the free end of the mirror arm 16 as a second reflection device.

The reflecting mirror 17 corresponds to the light transmitting window 13 in the figure. In this state, the light beam reflected by the first reflecting device 7 and emitted from the light transmitting window 13 is horizontally directed to the eye refractive power testing device 5 side. Reflect on.

Therefore, in this state, the eye refractive power of the subject can be inspected by using the subjective eye refractive power inspection device 5 and the visual target 11 displayed on the liquid crystal display panel 6.

On the other hand, when the visual acuity test of the examinee is performed by directly inspecting the optotype displayed on the liquid crystal display panel 6 by the examinee without using the eye-refractive-power inspecting device 5, the figure is first shown. The mirror arm 16 is lowered by a pulse motor, and the reflection mirror 17 is moved below the eye-refractive-power test device 5. After that, the support arm 3 is horizontally rotated in the direction of arrow 4,
By arranging the support arm 3 along the side wall 1a of the housing 1,
The subjective eye-refractive-power test device 5 is retracted from the front of the subject. Next, the mirror arm 16 is raised by a pulse motor (not shown), and the reflection mirror 17 is arranged at the height of the light transmitting window 13. In this state, the visual target 11 displayed on the liquid crystal display panel 6
The visual acuity test is performed by allowing the subject to visually recognize through the first reflecting device 7 and the reflecting mirror 17 as the second reflecting device.

[0020]

As described above, the present invention displays the optometry table used for the optometry of the examinee, the housing spaced apart from the examinee through the table, and the optotype. A visual target display means provided in the housing for
A visual acuity test apparatus comprising a reflector for guiding a light beam from the optotype display means in the housing a number of times and then emitting the light toward the outside of the housing to the subject at the optometry position, Since the configuration is provided with an examiner's optometry information display means for displaying at least the visual target as optometry information on the housing invisible to the subject at the optometry position of the table,
Even in an eyeglass store or an ophthalmology clinic with a small floor area, it is possible to secure a sufficient optical distance for a visual acuity test, and there is also information that the examiner needs for optometry other than the optotype and does not need to be presented to the examinee. You can check easily.

Further, even in a small vehicle compartment such as a bus for local medical treatment, a sufficient optical distance for visual acuity test can be secured.

Further, since the supporting portion such as the reflecting mirror is not provided above the second reflecting device and the like, the examiner and the examinee do not feel pressure.

[Brief description of drawings]

FIG. 1 is a perspective view of a visual acuity test device according to the present invention.

FIG. 2 is a side view seen from the direction II in FIG.

FIG. 3 is a schematic plan view of FIG.

FIG. 4 is an optical path diagram of the visual acuity test device shown in FIGS. 1 to 3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Table 6 ... Liquid crystal display panel (visual target display means) 7 ... 1st reflective device 11 ... Visual target 14 ... Liquid crystal display panel (optometry information display means) 17 ... Reflection mirror (2nd reflective device) )

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Sasaki 75-1 Hasunumacho, Itabashi-ku, Tokyo Topcon Co., Ltd.

Claims (1)

[Claims] 1. An optometry table used for optometry of an examinee, a casing arranged at a distance from the examinee via the table, and provided in the casing for displaying an optotype. And a reflecting device for reflecting the light flux from the target display means in the housing a number of times and then emitting the light toward the outside of the housing to guide the subject to the optometry position. A visual acuity test apparatus, wherein the examiner's optometry information display means for displaying at least the visual target as optometric information is provided on the housing invisible to the subject at the optometric position of the table. apparatus.