METHOD OF DETERMINING THE POSITION OF THE INTRAOCULAR LENS Russian patent published in 2023 - IPC A61B3/117 

FIELD: medicine; ophthalmology.

SUBSTANCE: invention can be used to determine the position of an intraocular lens (IOL). Optical coherence tomography of the anterior segment of the eye is performed on the Optovue device using the Cornea Crossline scanning protocol. Images of the iris profile, anterior and posterior surfaces of the IOL are obtained in meridians 0–180 and 90–270, on each of which, using the Point Line tool, within the visible section of the IOL, parallel to the tomograph beam path, the first and second segments are built with the same distance from the anterior to posterior edge of the IOL. The midpoints of the first and second segments are connected by a third segment through which the IOL plane passes. The middle of the third segment is the center of the IOL. Further, in each image, in the meridians 0–180 and 90–270, lines are drawn parallel to the path of the beam of the tomograph through the center of the IOL and the center of the pupil. The amount of decentration in the meridians 0–180 and 90–270 is determined as the distance between these lines. In each image, in the meridians 0–180 and 90–270, the angle between the tomograph beam path and the IOL plane is determined and the IOL inclination angle is calculated as the deviation from 90 of the angle between the tomograph beam path and the IOL plane.

EFFECT: method allows to evaluate the plane and center of various models of the IOL, required to determine the angle of inclination and decentration of the IOL due to the stated landmarks.

1 cl, 1 dwg, 2 ex