JPS62281920A - Sight function examination apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention A0 Purpose of the Invention A. Field of Industrial Application This application relates to a visual function testing device suitable for infants and handicapped children (persons).

■, Conventional techniques and their problems■, Landolt ring visual acuity test■ The subjects of this test were intellectually healthy children aged 6 years and older to adults with cognitive and speech abilities. For this reason,
Healthy infants under the age of 3, children with developmental delays who do not speak and have low language comprehension, children with physical disabilities who are unable to maintain posture, autistic children with stereotypic behavior, and other disabilities. For children with multiple disabilities, it was considered impossible to perform a subjective visual acuity test. In other words, in conventional testing methods, subjects are asked to read letters.

Ask the subject to say the names of animals and plants, or present a Landolt ring with cuts in various directions, such as up, down, left, right, etc., and ask the subject to point at the cut, verbally say it, or give a similar Landolt ring to orient it in the same direction as the sample. Because of this, it was thought that people with a mental age of at least 6 years or older were capable of these actions. Therefore, it was thought that the target group described above would be unable to perform these tasks, and no visual acuity tests were conducted at all.

I
5) 'Invented by PTeller.

In Japan, there are Awaya and Mohindra type date point PL devices. This was done by presenting vertical stripes of various widths and a plain pattern with the same average brightness on the screen from behind, and observing which direction the test light was gazing at. Visual acuity is calculated assuming that you can see.

However, this method also has some problems.

■ Infants and toddlers after 1 year of age tend to have distracted attention and short attention spans, making it difficult to perform the main test.

■ For infants and children with disabilities, this examination is also necessary for the reasons stated in ■■ of I! : cannot be performed, and also cannot be performed if the patient has nystagmus, etc.

■ Autistic cousins are not required to take this test at all because they require some effort to get their attention.

■ Generally speaking, horizontal stripes are more likely to attract the attention of infants, children, etc. than vertical stripes, but in this case, the stripes are only vertical.

B1 Structure of the invention A1 Means for solving the problem The present application attempts to solve the above-mentioned problem with the following structure. That is, in the case of the present application, a pattern pattern such as a stripe or a pattern with brightness equal to that of the projector, etc., or a plain pattern with the same brightness as this pattern is irregular for the left and right screens.The reaction device is divided into left and right sides corresponding to the left and right screens. , is a visual function calibration device configured to notify the correct answer with a buzzer or the like when the subject responds to the side on which the pattern pattern is projected.

Embodiment 1 is a visual function test wearing device of the present invention, which is composed of a stimulus presentation device main body 2, a reaction device 11 disposed in front of the device main body 2 at a predetermined distance, and the like. Therefore, the device main body 2 has four supporting legs 6 having a small moving wheel 6A at the lower end.
A table 6 with a top plate 6C stretched over the top end of B and this top plate 3
A milky-white screen 4°5 that cannot be seen through stands up on the front edge of C, and behind this screen 4,5 there is a pair of left and right glow projectors 6.7 (Elmol trademark-8-300) that project onto the screen 4.5. ), and these projectors 6 and 7 are configured to project a pattern pattern such as stripes and a plain pattern having the same brightness onto the screen 4 in a sliding manner to either the left or the right. Reference numeral 8 denotes a front wall that stands up on the front edge of the top plate 6C, and the left and right screens 4.degree. 5 are exposed on this front wall. Furthermore, a gaze point 9 with a flashing red light 10 is disposed approximately in the center of the front wall 8. Note that this camera 10 can also be provided with a peephole to perform necessary observations. Also,
Regarding the operation of the projector, each pattern is precisely time-controlled by a shutter.

In addition, regarding the above striped pattern, the width of the stripes is 5
It's a good idea to prepare a few different types. On the other hand, the reaction device 11 may be any of the ball inserting tool 12, the mold fitting tool 16, and the contacting tool 14. Therefore, the ball holder 12 includes a golf ball 12A and left and right boxes 12B that receive the ball 12A.
, 12C, and the top plates of the boxes 12B and 12C have insertion holes 12B' and 12C', and the bottom has a switch 12B that is activated when the ball 12A is inserted.
", 12C" are arranged. Therefore, this ball holder 12 is placed at about 3 OcrIL in front of the subject's eyes and used for toileting. When the subject puts it in the box on the side of the handle pattern, the "Bing Bong" buzzer 12D sounds as a correct response.

Note that this can be switched between left and right using the controller 12E.

The contact tool 14 has touch sensors 14C, 14 divided into left and right sides on a transparent screen 14B stretched over the stand-up frame 14A.
D is attached.

Therefore, this contact tool 14 is presented in front of the subject, and the subject holds the handle pattern side with his or her hand.Another 17 is a reaction time measuring device disposed between the reaction device 11 and the projectors 6 and 7. . This device tK measures the reaction time from when a pattern is presented until the subject responds, and checks whether the subject responds correctly or incorrectly.

In addition to the above, stereoscopic vision calibration and astigmatism calibration can be performed as follows. That is, red and green or yellow and black points 15A.

A random figure 15 (stripe pattern) in which 15B are randomly arranged is prepared to check stereoscopic vision. In addition, the first
While FIG. 1 shows random dots, FIG. 12 shows red and green dots arranged in vertical stripes with parallax. The calibration was performed by presenting a striped pattern on either the left or right side and a random dot array with no pattern.The subject wore glasses consisting of red and green lenses, and React to patterns. In the above, two projectors on the left and right are used to display a plain pattern on one side and a knitted pattern on the other in a sliding manner, but using only one projector, slide 16 as shown in Figure 313 It is also possible to use a combination of the two patterns. The bottom side has a striped pattern 16A, and the right side has a pattern 16B with only a frame cut out and the surrounding area printed in black. When this is set inside a projector, the transparent part on the right side passes the light from the light source as it is, so the brightness is equal to the average brightness of the striped pattern part. ) on top of the transparent part to reduce the brightness. In this case, prepare several sheets with stripes of various widths on one side and transparent stripes on the other side as shown in the figure (the striped portions and the transparent portions are alternate on the left and right).

How to use Subjects learn to discriminate between stripes and solid colors before measurement, and then display stripes (vertical) on the screen.

Measurements are taken by presenting a plain color (horizontal) and a plain color.

C1 Effects of the invention A: It is possible to measure the subjective visual acuity of infants under 3 years of age (after 1 year of age, for whom the PL method is said to be impossible in 10% of cases) who do not speak and have a low level of language comprehension.

It is possible to measure the visual acuity of people with mental retardation who have low oral and language functions and communication skills.

C. Measurement is also possible for children with single disabilities such as those with physical disabilities such as cerebral palsy, children with hearing and speech disabilities, and visual disabilities.

Second, it is also possible to measure children with epilepsy with mental retardation, Down's cousins, and children with cerebral palsy.

E. Measurements can also be made in children with free light, behavioral abnormalities, and children with minute brain injuries who often exhibit stereotypic behavior.

The same method can be used to measure not only healthy infants, infants, infants and children with disabilities, but also persons with disabilities.

It can be applied not only to adults with brain disorders, but also to the elderly.

In addition to the above-mentioned slide projector, the stimulus can be presented using, for example, a lens-type optical device 18 as shown in FIG. 14. In the figure, 18A is a halogen lamp, 18B and 18C are convex lenses, 18D is a stimulus presentation turret, 18E is an objective lens, 18F and 18G are mirrors, and 18H is a screen. This device 18 can be made more compact as a whole than a device using a slide projector. In addition,
By substituting one or two microcomputer-controlled displays for the stimulus presentation device, calculation processing and the like can be performed quickly. Furthermore, instead of the monitor television camera 10, a half mirror 19A may be provided above the screen 19 as shown in FIG. 15, so that the examiner can directly observe the condition of the subject from this half mirror. In this case as well, a monitor television camera can be installed.

[Brief explanation of drawings]

FIG. 1 is a front view of the stimulus presentation device, FIG. 2 is a right side view of the same as above, FIG. 6 is a left side view of the visual function testing device, FIG. 4 is a schematic plan view of the same as above, and FIG. FIG. 6 is a perspective view of the mold fitting tool, FIG. 7 is a perspective view of the contact tool, FIG. 8 is a slide projector series operation circuit, FIG. 9 is a circuit diagram of the touch plate, and FIG. 10 11 and 12 are a front view of a slide for stereoscopic vision and astigmatism testing; FIG. 13 is a front view of another embodiment of the slide; and FIG. A schematic block diagram of another embodiment of the stimulus presentation device, and FIG. 15 is a schematic front view showing another embodiment of the screen. 111. Visual function testing device, 241. Stimulus presentation device main body,
11. Reactive loading. Patent Applicant Shijinko Mitsuboshi 38 3c Figure 10 Figure 11 + 5A Figure 12 Figure 13

Claims (1)

[Claims] A stimulus presentation device main body configured to irregularly project a pattern pattern such as stripes or a plain pattern having the same brightness as the pattern using a projector or the like onto the left and right screens is at a predetermined distance from the main body of the stimulus presentation device. A visual function test characterized in that the reaction device arranged in the screen is divided into left and right sides corresponding to the left and right screens, and is configured to notify the correct answer with a buzzer or the like when the test subject reacts to the side on which the pattern pattern is projected. Device.