Patent ID: 6802837
Filing Date: 2004-10-12
Classification: A61B,A61F

Abstract:
A device used for the photorefractive keratectomy of the eye, comprisingan UV laser beam (UV) for ablating parts of the cornea, a fixation light beam (24) which has a wavelength in the visible region and which is directed onto the eye, and means for determining the point (20) at which the fixation light beam (24) passes through the front face of the cornea (12), comprising a centering light beam (34) which is directed onto the eye coaxially with the fixation light beam (24) and which has a wavelength different from that of said fixation light beam, and means (28, 36) for measuring the position (20) of the scattered light/Fresnel reflex of said centering light beam (34) directly impinging on the front face of the cornea (12).