Computer model of keratoscope and its application to analyse misalignments of optical system components

Keratoscope is an ophtalmology device destined to measure topography of the cornea in order to perform microsurgical operation and to select contact lens. The linear and angular misalignments of the mirror relative to the device main axis, as well as influence of the lateral and axial errors of targeting the device to patient’s eye, are investigated using a keratoscope computer model with combined conic mirrors. To simplify calculation, the cornea is represented by a convex spherical mirror with the radius equal to the average curvature radius for aspherical outer surface of the normal human eye at its apex.