METHOD AND ARRANGEMENT FOR HIGH-RESOLUTION TOPOGRAPHY OF THE CORNEA OF AN EYE

A-confocal, interferometric measuring arrangement, a spatially resolving detector, apparatuses for positioning purposes and an evaluation unit. A beam splitter serves to output couple and image on the spatially resolving detector some of the light signal reflected by the cornea, upstream of which detector a reference light source with a delay line and a beam splitter are arranged in order to realize a superposition of the part of the light signal reflected by the cornea, to be imaged on the spatially resolving detector with a reference signal. The evaluation unit is determines the topography of the cornea from the simultaneously recorded signals of the interferometric measuring arrangement and the spatially resolving detector. The proposed solution combines a confocal FD OCT method with elements of imaging holoscopy and can thereby interferometrically measure the topography of the cornea with the necessary accuracy.