METHOD FOR STUDYING DIPLOPIA Russian patent published in 2023 - IPC A61B3/00 A61F9/00 

FIELD: medicine; ophthalmology.

SUBSTANCE: fields of vision are separated using red-green glasses, luminous objects are presented, double images are combined after the image is presented, and the relative position of the double images is estimated. The study is carried out sequentially from distances of 1 m and 3 m, corresponding to a view near and far, while a tangential grid is projected onto the screen with 1 m or 3 m corresponding to this distance, circles are marked corresponding to marks 5°, 10°, 15° and 20°. Meridians are applied radially on a circular scale from 0 to 360°. A green dot is projected into the center of the grid using a projector. The patient in anaglyph glasses fixes this point with his eyes, he has a laser pointer in his hands, which also projects a red dot on the screen. Further, the patient, changing the position of the head, thereby changes the direction of gaze, leaving the object of fixation unchanged. Start the study with the head position to the left/down, while the gaze is directed to the right/up; being in this position, the subject, with the help of his pointer, “covers” the point projected in the center of the screen, trying to make both points coincide. In the presence of diplopia, these images do not match; the position of the red dot is marked by the examiner on the screen using the computer mouse displayed on it. Next, the patient moves his head to the right in such a way that he looks at the “frowningly” mark. Then the patient continues to turn his head to the right, while looking up/left. Then turn the head to the left, while the gaze is directed to the right. After that, the patient turns his head to the right through the central position, at the end point the gaze is directed to the left. The third stage — the head is raised and turned to the left, the gaze is directed down/to the right, the patient turns his head to the right without lowering it, while the gaze is directed down all the time, at the end point — to the left/down. At each point in time, the subject's pointer covers the projected point in such a way that they are completely aligned according to the subjective perception of the patient, but objectively, the position of the point from the patient's pointer changes. According to the results of the study, the shift of the imaginary image is estimated depending on the position of the head, as well as the speed of the patient's adaptation to changes in diplopia.

EFFECT: method makes it possible to increase the informativeness and accuracy of diagnosing diplopia due to the possibility of an objective quantitative assessment of diplopia during a change in the direction of gaze and assessment of diplopia for near and far distances.

1 cl, 2 ex