JPH0622911A - Optometer - Google Patents

Abstract

PURPOSE:To provide an optometer which can estimate the recognition state of the eye of a tested person and can correctly carry out the optometry work. CONSTITUTION:As for an optometer 1 for carrying out the ophthalmeteric eye test for the eye of a tested person, a memory means which memorizes a number of simulated recognition patterns corresponding to a variety of recognition states, input means for inputting the recognition pattern selection information on the basis of the recognition information supplied from the inspected person, accompanied with the test of the eyes of the tested person, judging means for judging the simulated recognition pattern corresponding to the recognition pattern selection information supplied from the input means, and a display means 13 for displaying the simulated recognition pattern judged by the judging means are provided. With this constitution, the simulated recognition pattern corresponding to the recognition state of the tested person is displayed on the display means 13, and a tester can recognize the actual recognition state of the tested person by eyes, and the subsequent optometry work can be carried out correctly and smoothly regardless of whether the tester is skilled or unskilled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optometry apparatus, and more particularly, to an optometry apparatus having improved examination efficiency.

[0002]

2. Description of the Related Art Conventionally, as an optometric apparatus for an eye of an examinee, an observing means for consciousness is supported on a table so as to correspond to the eye of the examinee, and the optometer of the examiner By visually observing the visual target in the test chart arranged in front of the inspection means through the window, the astigmatism of the subject,
The sphericity and visual acuity were measured.

[0003]

However, in the conventional apparatus having the above-described structure, the examiner cannot directly know in what state the eye of the subject actually sees the optotype, and the optometry is performed. In practice, it depends on the skill of the examiner and the method of thinking and error. Therefore, in the case of an unfamiliar examiner,
There is a problem that a large error occurs in the measurement data even when the optometry is performed.

Therefore, it is an object of the present invention to provide an optometry apparatus which is capable of inferring the visual recognition state of the eye of a subject and accurately performing the optometry work by improving the configuration of the apparatus.

[0005]

DISCLOSURE OF THE INVENTION The present invention is an optometry apparatus for subjecting a subject's eyes to subjective optometry, and storage means for storing a number of simulated visual recognition patterns corresponding to various visual recognition states, and an examinee. Input means for inputting visual recognition pattern selection information based on the visual recognition information from the subject associated with the measurement of the eye, and the visual recognition from the input means among the large number of simulated visual recognition patterns stored in the storage means. It has a judging means for judging the simulated visual recognition pattern corresponding to the pattern selection information, and a display means for displaying the simulated visual recognition pattern judged by this judging means.

[0006]

According to the optometry apparatus having the above-described structure, the examiner inputs the visual recognition pattern selection information corresponding to the visual recognition information from the input device while listening to the visual recognition information associated with the optometry from the examinee. Based on the judgment, the simulated visual recognition pattern corresponding to the visual recognition pattern selection information is sent from the storage means to the display means and displayed. As a result, the examiner can visually confirm the actual visual recognition state of the subject, and can perform the subsequent optometry work accurately and smoothly regardless of whether he is proficient or not.

[0007]

EXAMPLES Examples of the present invention will be described in detail below.

A subjective eye examination apparatus 1 of the present embodiment shown in FIG.
Is disposed on the optometry desk 2 and an optometry desk 2 arranged in a store such as an eyeglass store, an inspection means 5 which is supported above the optometry desk 2 via arms 3 and 4 and which performs a subjective test. An operating unit 6 as an input unit, a control box 7 arranged in a desk supporting base 2a constituting the optometry desk 2, and a transmitting unit 8 arranged on one end face of the desk supporting base 2a for transmitting a remote control signal. A display panel device (visual acuity table display device) 9 arranged at a position several meters away from the optometry desk 2.

The display panel device 9 includes the transmitter 8
A receiver 10 for receiving a remote control signal from the receiver and a visual chart 11 for displaying various visual targets such as an astigmatism test chart based on the remote control signal received by the receiver 10 are provided.

The operation means 6 has an operation key portion 12 as an input means for inputting a remote operation signal for switching a test chart and inputting visual recognition pattern selection information based on visual recognition information of a subject, which will be described in detail later. And a display means 13 such as a liquid crystal display.

In FIG. 1, 5a is an optometry window provided in the inspection means 5.

FIG. 2 shows a main part of a control system of the optometry apparatus 1. The optometry apparatus 1 is connected to the operation means 6 including the operation key portion 12 and the display means 13 for the control means 15 which performs overall control and also functions as a determination means. Further, a pattern memory 16 as a storage means is connected to the control means 15.

The pattern memory 16 stores, for example, four types of astigmatism patterns P0, Pa, Pb, Pc shown in FIGS. 3, 4, 5, and 6 in which the entire circumference is divided by 15 degrees. .

The pattern memory 16 also stores the point cloud chart Px shown in FIGS.

The astigmatism pattern P0 corresponds to the state where there is no astigmatism with all the 24 radial lines being made clear. Astigmatism pattern Pa is calculated from 24 radial lines.
The line in the vertical direction and the direction forming an angle of 15 degrees with this line are made clear, and the other lines are made dotted lines showing the unclear state. The astigmatism pattern Pb is 4 out of 24 radial lines in the vertical direction.
The lines that form 5 degrees and the direction that forms 15 degrees with this are made clear, and the other lines are dotted lines showing the unclear state. In the astigmatism pattern Pc, of the 24 radial lines, the lines that form 90 degrees with respect to the vertical direction and the directions that form 15 degrees with respect to the vertical direction are made clear, and the other lines are dotted lines showing an unclear state.

Next, the operation of the optometry apparatus 1 will be described assuming that the astigmatism measurement of the subject is mainly performed and that the astigmatism test chart CH is displayed on the visual surface section 11.

It is assumed that the subject visually checks the astigmatism test chart CH by looking through the eye examination window 5a of the inspection means 5 and tells the examiner that a vertical line is clearly visible. The examiner inputs the visual recognition pattern selection information, which means the vertical direction, from the operation key portion 12 based on the visual recognition information from the subject. Based on this visual recognition pattern selection information, the control means 15 reads from the pattern memory 16 the astigmatic pattern Pa in which the vertical lines are clearly displayed, and this is displayed on the display means 1.
Send to 3. As a result, as shown in FIG.
Astigmatism pattern Pa is displayed on the screen.

Next, the control means 15 adds a temporary astigmatism degree in the direction of the axis different by 90 degrees from the case described above according to the visual recognition pattern selection information. As a result, the astigmatism pattern Pc is displayed on the screen of the display unit 13 as shown in FIG.

By changing the display from the astigmatism pattern Pa to the astigmatism pattern Pc in this way, the appearance of the examinee naturally changes, and based on this, the examiner obtains new visual information from the examinee and examines the examinee. Can estimate the person's astigmatism degree. Such speculation is extremely useful for unskilled examiners.

For example, if an astigmatism pattern Pc in which a clearly visible line changes from vertical to horizontal is displayed, the provisional astigmatism degree added by the control means 15 becomes too large.
Here, by changing the temporary astigmatism degree by the control means 15 and continuously obtaining the visual recognition information several times, the astigmatism pattern P0 with the proper astigmatism degree is finally displayed on the screen of the display means 13, and the astigmatism degree is confirmed. Finish the measurement.

Astigmatism axes are measured by using, for example, astigmatism patterns Pb and Pc.

Next, the measurement of the astigmatic axis using the point cloud chart Px stored in the pattern memory 16 will be described with reference to FIGS. 8 to 10.

The examiner inputs visual recognition pattern selection information, which means the point cloud chart Px, from the operation key portion 12 based on the visual recognition information from the subject. Based on this visual recognition pattern selection information, the control means 15 reads the point cloud chart Px from the pattern memory 16 and sends it to the display means 13. As a result, the point cloud chart Px as shown in FIG. 8 is displayed on the screen of the display unit 13.

When the eye to be inspected is an emmetropic eye, the point cloud chart Px looks as shown in FIG.
The points that form x appear circular. When the astigmatic axis of the eye to be inspected is 45 degrees, the point cloud chart Px looks distorted in the 45 degrees upward left direction as shown in FIG.

Further, when the astigmatic axis of the eye to be inspected is 135 degrees, the point cloud chart Px looks distorted in the direction of upward 45 degrees as shown in FIG.

By obtaining such visual recognition information of the appearance from the subject, the examiner can estimate the astigmatic axis of the subject's eye.

Further, by displaying each state of the above-mentioned point group chart Px on the screen of the display means 13 under the control of the control means 15, the examiner actually sees the subject. The state of the group chart Px can be visually confirmed.

Next, the measurement of sphericity using the point cloud chart Px stored in the pattern memory 16 will be described with reference to FIGS. 11 and 12.

The examiner inputs the visual recognition pattern selection information, which means the point cloud chart Px, from the operation key portion 12 based on the visual recognition information from the subject. Based on this visual recognition pattern selection information, the control means 15 reads the point cloud chart Px from the pattern memory 16 and sends it to the display means 13. As a result, the point cloud chart Px as shown in FIG.
Is displayed on the screen of the display means 13.

When the eye to be examined is an emmetropic eye, each point forming the point cloud chart Px looks like a clear circle as shown in FIG. When the eye to be inspected is, for example, myopia, the appearance of the point cloud chart Px is such that the outline of each point is blurred as shown in FIG.

By obtaining such visual recognition information from the subject, the examiner can estimate the degree of myopia or hyperopia of the subject's eye.

Also in this case, the point cloud chart Px described above is used.
By displaying each of the above states on the screen of the display means 13 under the control of the control means 15, the examiner visually confirms the state of the point cloud chart Px which the examinee actually sees. it can.

The present invention is not limited to the above-mentioned embodiments, but various modifications can be made within the scope of the invention.

For example, as a display mode of the point cloud chart Px, the point cloud chart Px corresponds to the emmetropic eye and myopia of the eye to be inspected.
It is also possible to change the display density of to darker or lighter, to display hyperopia in red and myopia in blue. It is also possible to change the aspect ratio of each point without changing the display density of the point group chart Px corresponding to the emmetropic eye and astigmatism.

Further, it is possible to display the values of the astigmatism axis and the sphericity, or to display the values of the sphere power, the cylinder power, and the astigmatism axis which are appropriate for the spectacle lens of the subject.

[0036]

According to the present invention described in detail above, with the above-described configuration, accurate and smooth optometry can be performed by estimating the actual visual recognition state of the examinee regardless of whether he is skilled or unskilled. A possible optometry device can be provided.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a main part of a control system in the apparatus according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram of an astigmatism pattern used in the apparatus according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of an astigmatism pattern used in the apparatus according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram of an astigmatism pattern used in the apparatus according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram of an astigmatism pattern used in the apparatus according to the embodiment of the present invention.

FIG. 7 is a plan view showing a display mode of display means in the apparatus of the embodiment of the present invention.

FIG. 8 is an explanatory diagram of a point cloud chart in the apparatus according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram of a point cloud chart in the device of the embodiment of the present invention.

FIG. 10 is an explanatory diagram of a point cloud chart in the apparatus according to the embodiment of the present invention.

FIG. 11 is an explanatory diagram of a point cloud chart used in the apparatus of the embodiment of the present invention.

FIG. 12 is an explanatory diagram of a point cloud chart used in the apparatus of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optometry apparatus 6 Operation means 12 Operation key part 13 Display means 15 Control means 16 Pattern memory

Claims (1)

[Claims] 1. An optometry apparatus for performing subjective optometry of a subject's eye, and a storage means for storing a large number of simulated visual recognition patterns corresponding to various visual recognition states, and this measuring device associated with the measurement of the subject's eye. Input means for inputting visual recognition pattern selection information based on visual recognition information from an examiner, and simulated visual recognition corresponding to visual recognition pattern selection information from the input means among a large number of simulated visual recognition patterns stored in the storage means. An optometry apparatus comprising: a judgment means for judging a pattern and a display means for displaying a simulated visual recognition pattern judged by the judgment means.