Methods, instruments, electronic devices, computer programs, and computer-readable storage media for corneal topography measurement.

Abstract

This invention belongs to the field of ophthalmic medical device technology, and provides a method, instrument, electronic device, and program product for measuring corneal topography. The method involves acquiring the corneal diameter and apex of the subject's cornea; determining the distance between the corneal apex and the apex of the Placido disc, and determining the eccentricity of the Placido disc; determining the shape of the Placido disc based on its eccentricity, and determining the number of rings of the Placido disc based on the corneal diameter; acquiring corneal topography images after reflection from the concentric rings on the Placido disc onto the corneal surface of the subject; and analyzing the multiple concentric rings contained in the corneal topography image based on the shape and number of rings of the Placido disc to obtain the corneal topography data of the subject. This improves the accuracy of corneal topography measurement, thereby enabling more accurate acquisition of minute morphological features of the corneal surface.

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