METHOD FOR EVALUATING DYNAMIC POSITION OF INTRAOCULAR LENS Russian patent published in 2019 - IPC A61B8/10 A61B5/107 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, particularly to ophthalmology. To assess the dynamic position of the intraocular lens (IOL) by ultrasonic biomicroscopy (UBM) in the patient's horizontal position, the "trabecula-iris" (D 1) and the distance "iris pigeon leaf-optical part IOL" (D 2) are measured, as well as by the OCT RTVue method in the Crossline mode in the vertical position of the patient's body, the "trabecula-iris" (D 3) and the "iris pigeon leaf-optical part IOL" (D 4) distances are measured in two mutually perpendicular meridians diametrically opposite, in mm, at points equidistant from the center IOL. In case measured separately by UBM method or by OCT separately distance differ from each other by less than 0.1 mm in each meridian at diametrically opposite points, and also differ from each other by less than 0.1 mm in each meridian at diametrically opposite points when comparing distances measured by UBM method with distances measured by OCT method, then dynamic position of IOL is stable. If the distances measured separately by UBM or by OCT differ from each other by less than 0.1 mm in each meridian at diametrically opposite points, as well as D 1 and D 3 differ from each other by less than 0.1 mm in each meridian at diametrically opposite points, and D 2 and D 4 differ from each other by more than 0.1 mm, then this indicates a dynamic displacement IOL relative to the iris profile without changing the anterior chamber angle profile. If the distances measured separately by UBM or by OCT differ from each other by less than 0.1 mm in each meridian at diametrically opposite points, and D 1 and D 3, and D 2 and D 4 differ from each other by more than 0.1 mm, this indicates a dynamic shift of IOL relative to the profile of the iris with a change in the profile of the angle of the anterior chamber. If distances measured separately by UBM or by OCT differ from each other by more than 0.1 mm in each meridian at diametrically opposite points, and D 1 and D 3, and D 2 and D 4 differ from each other by more than 0.1 mm, then it indicates dislocation IOL with its dynamic mobility.

EFFECT: method provides more accurate, reliable determination of the IOL position depending on the patient's body position, which enables to detect a pseudophakic aetiology of ophthalmic hypertension, iridocyclitis, macular edema with further stabilization of the IOL position.

1 cl, 4 ex