JPH10181A - Eye examining device - Google Patents

Abstract

(57) [Summary] (With correction) [Problem] To detect position information of a subject at the time of optometry and to display the position to the subject when the position is shifted. SOLUTION: An optotype 2 representing a Landolt's ring and an illumination lamp 3 behind the optotype 2 are provided inside a housing 1 which is an automatic optometer, and the two eyes of the subject S are in sight. A viewing window on the optical axis connecting the target 2 is provided with a left-eye lens 4a and a right-eye lens 4b that provide an optical action equivalent to far vision and serve as an optometry opening. The subject S having arrived at the predetermined position is the target 2 illuminated by the lamp 3 via the lenses 4a and 4b.
Is observed, and the direction is operated by operating the response keyboard at hand. Also, on both left and right sides of the viewing window, a pair of light emitting elements 5 and light receiving elements 6 made of a diode or the like face the both sides of the face of the subject S so that the light flux is blocked by the subject S. Are located.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eye examination apparatus that can suitably examine one's own eyes.

[0002]

2. Description of the Related Art In many conventional eye examination apparatuses, an examiner mainly performs an eye examination while giving instructions to a subject.

[0003]

When an examinee performs an examination by himself / herself, it is difficult for the examinee himself to confirm whether or not the eye to be examined is at a proper position for the optometry. Cannot be performed properly.

An object of the present invention is to provide an eye examination apparatus that allows a subject to perform self-examination at an appropriate position.

[0005]

An eye examination apparatus according to the present invention for achieving the above object has a detecting means for detecting positional information of a face of a subject with respect to an optometric position, and a detecting means for detecting the eye information at the time of an eye examination. Display means for displaying the detection information to the subject.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows an embodiment in which the present invention is applied to an automatic optotype. An optotype 2 representing, for example, a Landolt's ring is provided inside a housing 1 and an illumination lamp 3 is provided behind the optotype 2. The left eye lens 4a and the right eye, which are provided and have a viewing window on the optical axis connecting the two eyes E and the target 2 of the subject S, have an optical action equivalent to far vision and become an eye examination opening. An ophthalmic lens 4b is provided. The subject S who has arrived at the predetermined position observes the target 2 illuminated by the lamp 3 via the lenses 4a and 4b, and responds to the direction of the Landolt's ring by operating the response keyboard at hand. ing.

FIG. 2 shows an example of the response keyboard 7, in which four push buttons 7a to 7d corresponding to different directions of the Landolt's ring are provided. Judging the direction of the upper Landolt's ring, push button 7a
To 7d to respond.

Further, a pair of light emitting elements 5 and light receiving elements 6 each composed of a diode or the like as shown in FIG. It is arranged facing both sides of the face. When the face of the subject S approaches the viewing window, the light from the light emitting element 5 is shut off, the illumination lamp 3 is automatically turned on by a signal from the light receiving element 6, and conversely, the face of the subject S When away from the predetermined position, light from the light emitting element 5 enters the light receiving element 6 and the subject S
Is output, and the lamp 3 is turned off.

FIG. 3 shows the light emitting element 5, light receiving element 6,
Lighting lamp 3, response keyboard 7, controller 8,
FIG. 2 is a block circuit diagram illustrating a relationship with a timer 9, wherein a controller 8 is usually a CPU (Central Processing Unit)
And a ROM (Read Only Memory) containing a program, and the respective units are connected in parallel with the controller 8 as a functional center.

At the time of visual acuity measurement, first, the light emitting element 5 is turned on, the subject S fixes the eye E at a predetermined position, and cuts off the light from the light emitting element 5, so that the light receiving element 6 is The presence, that is, the fact that the eye to be inspected is at a predetermined position with respect to the lenses 4a and 4b, which are the detection apertures, is detected, a presence signal is transmitted to the controller 8, and the illumination lamp 3 is immediately turned on by the command of the controller 8 to allow visual observation The target 2 is illuminated, and the subject S reads the target 2 and inputs a response to the controller 8 via the response keyboard 7.

If the face of the subject S unconsciously moves a little away from the apparatus during the measurement, the timer 9 is activated via the controller 8 by the subject absence signal from the light receiving element 6 to count. Start. Within the first set time set in the timer 9, the subject S
If no response is given, it is determined that the subject S has actually left the place, the lamp 3 is turned off, and the measurement is terminated. However, if the subject S responds within the first set time, it is considered that the face of the subject S has only slightly deviated from the predetermined position. After a lapse of a set time, for example, the lamp 3
Blinks to warn the subject.

When the subject S notices that his / her face is separated by a warning and immediately returns his / her face to a predetermined position, the light receiving element 6
Recognizes this, the blinking of the lamp 3 is stopped by the command of the controller 8, and the normal measurement is continued. If the state in which light enters the light receiving element 6 after the warning display continues for the third set time set in the timer 9, it is determined that the subject is actually absent, and the lamp 3 is turned off and the measurement is performed. Ends.

Incidentally, the second set time may be such that the counting is started by the timer 9 immediately after the subject absence signal is inputted, similarly to the first set time. The counting may be started immediately after the response of the subject S is input during the counting. The warning display can be performed by sound or voice in addition to the blinking of the lamp 3, and the warning by the blinking of the lamp and the sound may be performed simultaneously.

The response keyboard 7 may be of a type that responds by, for example, tilting the operating rod arranged at the center of the keyboard 7 in the direction of the matched index.

In the above-described embodiment, the case of the automatic eyesight meter using the Landolt's ring has been described. However, the present invention can be similarly applied to other eye inspection apparatuses such as a binocular visual function measuring instrument. . Further, in the embodiment, a light blocking type for detecting whether or not the face of the subject is at a predetermined position is used. However, it is also possible to use another type such as a reflected light detection type. Of course.

[0016]

As described above, according to the eye examination apparatus according to the present invention, the subject can confirm his / her own position information with respect to the optometry position, and the subject himself / herself can properly examine the subject's eye for examination. Since it is possible to always consciously adjust the position, a more accurate test result can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an automatic eyesight meter.

FIG. 2 is a plan view of a response keyboard.

FIG. 3 is a block circuit diagram.

[Explanation of symbols]

 Reference Signs List 1 housing 2 optotype 3 lamp 4 lens 5 light emitting element 6 light receiving element 7 response keyboard 8 controller 9 timer

Claims (3)

[Claims] 1. A detecting means for detecting positional information of a face of a subject with respect to an optometric position, and a display means for displaying detection information of the detecting means to the subject during an eye examination. Eye examination device. 2. The eye examination apparatus according to claim 1, wherein the display means displays the detection information by blinking the illumination lamp. 3. The eye examination apparatus according to claim 1, wherein said display means displays the detection information by sound or voice.