JP2000116600A - Vision instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vision instrument to present targets to enable even a young person to use by himself with interest lastingly without being bored. SOLUTION: An observing distance and the size of a screen 2 are entered previously, and optotype marks M showing animal figures of various sizes and directions are presented to a subject. The subject manipulates a responding means 5, and the directional response of each optotype mark M is entered into a computer 1 via a light receiving member 6 using infrared rays, and according to the given response, the next display is decided. In this manner, a vision training operation is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eyesight device used for eyesight measurement, eyesight training or eye refraction measurement in an ophthalmic hospital or the like.

[0002]

2. Description of the Related Art Conventionally, a visual acuity test and an eye refraction test have been performed at 5 m.
Place the optotype at a position about a distance away, wearing near-sighted glasses using a lens having an optical axis in the visual axis direction, is performed,
For example, the visual acuity is measured based on whether a direction such as a Landolt ring or an E mark has been recognized, or whether a target mark of a picture or a character has been recognized. The visual acuity is determined according to the size of the visual acuity mark, and expressed by one decimal place. In addition, an automatic optotype that displays the responding direction to the subject includes a dedicated liquid crystal target display unit and a control program. Further, a technique for storing a target mark using a bitmap memory is also known.

[0003]

However, the above-mentioned conventional visual acuity apparatus requires a space for installation, and the work of watching a CRT or the like on which a target is displayed is continued for a long time, so that an excessive load is applied to the eyes. There is a problem that the control muscles are over-tensioned and very tired. Also, with Landolt rings and E-marks, it is difficult to perform an eyesight test with interest, especially for young people, and an inspector who recognizes pictures and characters requires an examiner to judge whether or not the answer is correct. Therefore, there is a problem that the test cannot be performed by one person.

An object of the present invention is to solve the above-mentioned problems,
It is an object of the present invention to provide a visual acuity apparatus that presents a target that can be used continuously without being bored with interest.

Another object of the present invention is to provide an inexpensive visual acuity apparatus which can continue VDT work without fatigue and can perform an eye refraction test or a visual acuity measurement test even in a narrow place.

It is still another object of the present invention to provide a visual acuity apparatus which can perform visual acuity training by one person and can show the degree of improvement by a slight change in visual acuity.

[0007]

According to a first aspect of the present invention, there is provided a visual acuity apparatus for displaying a first mark and a second mark having various sizes. Mark alignment means for aligning the position of the first mark with the position of the second mark, wherein the eyesight is measured based on the size of the second mark adjusted by the subject. .

The visual acuity apparatus according to the present invention has mark presenting means for presenting an animal of various sizes in a different direction to a subject, and the visual acuity is determined by the size of the mark responded by the subject. Is measured.

A visual acuity apparatus according to the present invention is characterized by using viewing distance conversion glasses comprising convex lenses in which the left and right eye lenses are symmetrically decentered.

A visual acuity apparatus according to the present invention is characterized in that visual acuity marks of the same size are presented in a plurality of different directions, and the visual acuity is determined based on a correct answer rate of a response.

A visual acuity device according to the present invention is a visual acuity device that sequentially presents optotype marks having different directions and sizes, and automatically measures visual acuity based on a response. Are displayed differently.

A visual acuity apparatus according to the present invention has a target mark operated by a general-purpose computer OS, and a portable storage member storing a control program for the target mark.
The size of the display screen of the target mark and the observation distance can be input to the storage member before use.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows a front view of a vision training machine according to a first embodiment. A computer 1 operated by a general-purpose computer OS is used. The computer 1 has a display screen 2 and a keyboard 3 and a mouse for inputting data. 4. A light receiving member 6 for receiving a signal from the response means 5 and the like are connected.

First, a CDROM 7 as a portable storage member
The target mark M and its control software stored in the computer 1 are installed in the computer 1. Since the relationship between the size of the optotype mark M and the visual acuity F is programmed in advance, the observation distance and the size of the screen 2 are input before use. Accordingly, the relationship between the visual acuity value and the size of the optotype mark M seen by the subject is always kept constant, regardless of the size of the screen 2 and the observation distance.

The responding means 5 is operated by the subject, and inputs the directional response of the optotype mark M to the computer 1 through the light receiving member 6 by infrared rays. The next target display is determined according to the response, and the visual acuity training proceeds. The optotype mark M is displayed with animals of various sizes and directions. Animals are more interesting than abstract marks and can be used continuously. Unlike inanimate objects and plants, they have a head, so they have directionality, and as an optotype mark M that asks for a direction response asking which direction they are facing. It is suitable.

FIGS. 2 to 4 show an eye mark M of the animal displayed on the screen 2, and FIG. 5 shows a Landolt ring C used for an eyesight test. At first, a large target mark M is presented, and when the subject successively answers correctly, a smaller target mark M is presented. A plurality of optotype marks M having different sizes are presented.
Is presented. Even if the correct answer rate is 50% or less, the visual acuity F is displayed in the lower two digits according to the correct answer rate. Thus, the visual acuity F is calculated, and the result of each measurement is displayed.
Since the display can be made even with a slight improvement in visual acuity, the subject can be encouraged to continue the examination.

In addition, since the computer 1 emits a high-pitched pleasant sound in every response when the answer is correct, and emits a low unpleasant sound in the incorrect answer when the answer is incorrect, the subject makes an effort to produce a comfortable sound. The user sees the mark M, which is effective for eyesight recovery training.

The observation distance of the subject is preferably about 5 m. If the observation distance is not 5 m, the distance conversion glasses 8 as shown in FIG. 6 are used. These glasses 8 are left and right lenses 9L and 9R.
Each uses a symmetrically decentered portion of one large convex lens 9 as shown in FIG. Convex lens 9
Is the power to convert the observation distance to 5m,
Eyeglasses 8 for 2 m and 3 m are also prepared. Regardless of the distance between the pupils of the subject, the relationship between convergence and accommodation can be maintained in the same manner as when the spectacles 8 are not worn, so that the subject can be tired even when worn continuously. Absent. The glasses 8
Alternatively, the lenses 9L and 9R and the bridge 9 'may be integrally formed by molding.

FIG. 8 shows a distance conversion means 10 having an observation distance of about 1 m. A lens 11 is attached to a tip of a pole 12, and the other end of the pole 12 is fixed to the screen 2. The observation distance input to the computer 1 is the distance to the lens 11, and the subject looks at the screen 2 through the lens 11. Thus, it is possible to prevent the face from approaching during the examination and causing a measurement error.

FIG. 9 is a front view of the second embodiment, and FIG.
The present embodiment has the same configuration as that of the first embodiment except that the optotype mark M to be displayed and the way of response are different. The computer 1 is provided with a microphone 13 and connected to a response unit 5 having push buttons 5a and 5b.

The first target mark M1 is replaced with the second target mark M2.
To the smallest circle that is. A subject with better visual acuity can see a smaller circle, so that the subject can be well matched. The subject responds in four directions using the push buttons 5a of the responding means 5, and notifies the user of the match by pressing the push button 5b. These signals are input to the computer 1, and the pushbutton 5b can be pressed up to three times in accordance with any circle, and the visual acuity is calculated from the size of the smallest circle that can be matched.

FIG. 10 is an explanatory diagram of a display software screen according to the third embodiment, in which the first target mark M1 is replaced with the second target mark.
According to the bridge that is M2, a game that gradually progresses to the center is configured. The bridge becomes thinner toward the center, and the mark M1 is moved with the push button 5a along the path, and the push button 5b is pushed when the mark is adjusted to the bridge. It ends when you make a mistake twice in a row, and the small bridge that you can reach is equivalent to your eyesight.

FIG. 11 is an explanatory view of a display screen of the hunting game according to the fourth embodiment, in which optotype marks M of different kinds of animals appear on the screen 2 one after another. The examinee presses the aiming which is the first target mark M1 with the push button 5a.
And press the push button 5b in accordance with the animal target marks T1 and T2, which are the second target marks M2. Push button 5b
When the button is pressed, a sound is emitted from the microphone 13 from the gun, and if it matches, the image changes to an image in which the animal falls down, and if it does not match, the image in which the animal escapes.

At first, a small animal such as a pigeon comes out. In this case, since the target marks T1 and T2 are large,
Can be easily adapted. In the case of a large animal, the target marks T1 and T2 become small, and the measurement ends when the target mark is removed three times. How big the animal has been defeated indicates the quality of the visual acuity, and when finished, the defeated animal is displayed on the screen 2. In this way, since far-sightedness can be continued with an effort, it is possible to recover a decrease in visual acuity due to overstrain of accommodation caused by excessive near-sightedness.

[0025]

As described above, the visual acuity apparatus according to the present invention can be used in a game mode by measuring the visual acuity according to the degree of alignment between the first mark and the second mark. Automatic measurement can be continued continuously.

In the visual acuity apparatus according to the present invention, by presenting the optotype mark of the animal in a different direction, the direction of the optotype is clarified by the head of the animal, so that the user can be interested in the operation easily. Measurement can be performed, and since there are many types of animals, different optotype marks can be presented one after another, and the measurement can be continued without getting tired.

In the visual acuity apparatus according to the present invention, the relationship between the distance and the convergence is maintained in the same manner as in the case of non-wearing, irrespective of the interpupillary distance, by using the viewing distance conversion glasses composed of symmetrically eccentric convex lenses. So that you can see far away in a narrow place without getting tired.

The visual acuity device according to the present invention can present visual acuity marks of the same size in a plurality of times by changing the direction and displaying the visual acuity by the accuracy rate, so that the visual acuity can be represented more finely. It is suitable for display in the case of a vision training machine that changes to.

The visual acuity apparatus according to the present invention presents different optotype marks to the subject, and displays the correct or incorrect answer at that time to the subject each time, thereby making an effort to improve the visual acuity. Healing can continue.

The visual acuity apparatus according to the present invention can install a control program and an optotype mark operated by a general-purpose computer OS from a portable storage member to a general-purpose computer and perform a visual function test with an inexpensive system. it can.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment.

FIG. 2 is an explanatory diagram of an animal target mark.

FIG. 3 is an explanatory diagram of an animal optotype mark.

FIG. 4 is an explanatory diagram of an animal target mark.

FIG. 5 is an explanatory diagram of a Landolt ring.

FIG. 6 is a perspective view of viewing distance conversion glasses.

FIG. 7 is a side view of the lens.

FIG. 8 is a perspective view of a viewing distance conversion unit.

FIG. 9 is a front view of the second embodiment.

FIG. 10 is an explanatory diagram of a display screen according to a third embodiment.

FIG. 11 is an explanatory diagram of a display screen according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Computer 2 Screen 3 Keyboard 4 Mouse 5 Response means 6 Light receiving member 7 CDROM 8 Distance conversion glasses 10 Distance conversion means 13 Microphone C Landolt ring M, M1, M2 Target mark T1, T2 Target mark

Claims (7)

[Claims] 1. An image display means for displaying a first mark and second marks of various sizes, and a mark by which a subject matches the position of the first mark with the position of the second mark. An eyesight device, comprising: an aligning unit, wherein the eyesight is measured based on a size of the second mark adjusted by the subject. 2. The apparatus according to claim 1, further comprising: mark presenting means for presenting the subject with various sizes of animal marks in different directions, and measuring the visual acuity based on the size of the mark responded by the subject. Eyesight device. 3. A visual acuity apparatus using viewing distance conversion glasses comprising convex lenses in which the left and right eye lenses are symmetrically decentered. 4. A visual acuity apparatus characterized in that a visual acuity mark of the same size is presented a plurality of times in different directions, and a visual acuity is determined based on a correct answer rate of a response. 5. A visual acuity device that sequentially presents optotype marks having different directions and sizes and automatically measures visual acuity based on a response, wherein a different display is provided to a subject depending on whether the response is correct or incorrect. Eyesight device characterized by the above-mentioned. 6. The visual acuity apparatus according to claim 5, wherein a sound which is higher when the answer is correct than when the answer is incorrect is emitted. 7. A portable storage member storing an optotype mark operated by a general-purpose computer OS and a control program for the optotype mark, and a display screen size of the optotype mark before use. And an observation distance can be input to the storage member.