SU772526A1 - Aniseikonimeter - Google Patents

Description

(54) ANISEIKONIMETER

one

This invention relates to medicine and concerns aniseikonimeters used in ophthalmic examinations.

A device is known for determining the main meridians of aniseikonia, containing test objects made in the form of fixed slits located tangentially to the circumference, a gaze lock, an angle of degrees, red and green light sources 1.

The disadvantages of this device is that it provides only information about the presence of meridional aniseiconia without quantifying its size; the intermittent arrangement of test objects in the presence of a gap of 22 ° AOR between them limits the possibility of determining the meridional aniseikonia with the required accuracy.

The closest in technical essence to the present invention is an animeometer, comprising a body, a central object for fixing the gaze, monochromatic light filters and test objects 2.

Disadvantages of the device - there is no possibility of simultaneously determining the direction of the main meridians of the largest and smallest aniseikonia with its subsequent quantitative measurement; The patient's hetero-morphology adversely affects the results of the study.

The purpose of the invention is to improve the accuracy of research by simultaneously determining the direction of the main meridians of the largest and smallest aniseikonia and its quantitative measurement in any meridian.

The goal is achieved by the fact that the anime gauge is equipped with spring-loaded strips with additional test objects and a rotating ring-scale of aniseikonia size with a frame fixed on it, while the latter are equipped with spring-loaded strips with additional test objects installed with the possibility of synchronous movement with conical scales relative to central object of fixing the gaze, while the main test object is made in the form of a solid transparent ring.

FIG. 1 shows an animeckimeter, front view; in fig. 2 - the same, top view.

Claims (2)

The anime gauge contains a case 1, in the end part of which a disk 2 is fixed, on which the central object 3 fixing the gaze is mounted, the main test object 4 is in the form of a solid transparent ring, and the scale 5 is also applied in degrees 5. Case 1 is provided with a rotary relative to the central object 3 fixation gaze ring-scale 6 of the size of aniseikonia in percent and the frame 7 fixed on it, laying, her strained strips 8, synchronously mixed, Ayushii relative to each other by means of the lever 9 and the cables 10 connected with them and the strips 8. On the pl 8 nkah applied; in the form of a part of a ring, additional test objects 11, covered with green light filters and refreshed with light bulbs 12. The central object 3 of gaze fixation is made in the form of a black disk applied in the center of a frosted glass illuminated from the back by a light bulb 13. The luminous flux incident on the additional test objects 11 is controlled by a potentiometer 4. To ensure accurate measurement of aniseikonia size, lever 9 is provided with a scale 15. Inside the housing 1 two monochromatic light filters 16 and 17 are mounted, through which the light from the lamps 18 and 19 falls on the disk 2 The light bulbs 19 and 18 are separated by an opaque partition 20. The green light bulb 19 is turned on and off by means of a toggle switch 21. The test is done using an animeter gauge in a darkened room. A patient in red and green glasses looks at an animeikoimer from a distance of 1–4 m. By using glasses with light filters painted in additional colors, separation of the visual fields is achieved, as a result of which, with binocular vision, the main testoblicus 4) will simultaneously be visible to one eye in the form of a red ring, and the other eye - in the form of a green ring. The central gaze fixation object 3 is visible binocular and stimulates fusion. In case of iseconia, the red and green images of the main test object 4 coincide with each other. In the presence of aniseikonia or heterophoria, the red and green images of the main test object 4 do not coincide. In order to eliminate the influence of heterophoria on the results of aniseikonia measurement, preliminary correction of the heterophoria of the patient with the help of prismatic glasses or a prism compensator is carried out. Before proceeding with the measurement of aniseikonia, the direction of the main axes of the meridional aniseikonia is determined. The proposed aniseiconimeter works as follows. The linear gauge is connected to the mains, with the result that the red and green lights 18 and 19 light up, separated by an impenetrable partition 20. Light passes through the light filter 16 and 17 and illuminates the MAIN test object 4, the light 13 lights up on disk 2, illuminating the glass with glued disk central object 3 fixing the gaze. If the patient has aniseiconia, and depending on its degree, the red and green images of the main test object 4 are dispersed with respect to the central object 3 of gaze fixation. At the meridional aniseikonia, the images of the main test object 4 have the shape of an ellipse, the major and minor axes of which correspond to the main axes of the meridional aniseikonia, determined on the back scale of 5 TAVO in degrees on the disk 2. After determining the principal axes of the meridional aniseikonia, it is measured quantitatively. Using the toggle switch 21 turn off the green light bulb 19 and at the same time turn on the light bulb 12 installed in the movable slats 8, on which additional test objects AND colored green are made as part of a ring. The ring-shaped 6 is rotated relative to the scale 5 of the disk 2 by the meridian of interest to us, while together with the ring-scale 6 the frame 7 with spring-loaded strips 8 and the lever 9 with the vernier scale 15 are rotated. With the help of a potentiometer 14 placed on the body 1, the normal luminous flux of the light bulbs 12 is adjusted. After the ring-scale 6 is placed on the meridian in which it is necessary to measure the size of aniseikonia, the doctor turns the lever 9 clockwise, causing the strip 8 additional test objects 11 are synchronously sblizhats using cables 10 to a central facility 3 gaze fixation. The lever 9 is reversed until the patient marks the coincidence of the main red test object 4 with the green additional test objects P. The percentage of aniseikonia in percent is determined on a scale on ring 6. The presence of a vernier scale 15 allows measurement with an accuracy of 0.1% . The proposed aniseikonimeter makes it possible to produce, with a sufficiently high degree of accuracy, the amount of aniseikonia in percent, simultaneously determine the direction of the main meridians of the greatest and the least aniseikonia and measure it quantitatively in any meridian, eliminate the influence of heterophoria on the accuracy of aniseiconia. Aniseikonimetr simple in design, reliable and easy to use. Claims of the invention Aniseuikonimeter comprising a body, a central object of fixing the gaze, monochromatic light filters and test objects, characterized in that, in order to increase the accuracy of research by simultaneously determining the direction of the main meridians of the largest and smallest aniseikonia and quantitatively measuring it in any meridian, it is equipped spring-loaded strips with additional test objects and a rotary ring of the size of aniseikonia with a frame attached to it, at the same time There are spring-loaded strips with additional test objects that are installed with the possibility of synchronous movement with conical scales relative to the central object of gaze fixation, while the main test object is made in the form of a solid transparent ring. Sources of information taken into account in the examination 1 USSR Author's Certificate No. 395066, cl. A 61 3/08, 1973. 2 USSR author's certificate No. 293379, cl. A 61 B 3/00, 1972.