DEVICE FOR THE CORRECTIVE SURGERY OF DEFECTIVE VISION OF AN EYE, METHOD FOR GENERATING CONTROL DATA THEREFOR, AND METHOD FOR CORRECTIVE SURGERY OF DEFECTIVE VISION OF AN EYE

摘要

A device is described for corrective surgery of defective vision of an eye (3) of a patient (4). The device comprises a laser apparatus (L) that is controlled by a controller (12) and cuts corneal tissue by means of a laser beam (2). In order to focus the laser beam (2) in the cornea (5), the controller (12) steers the laser apparatus (L) towards a target point (28) located in a pattern in the cornea (5), and selects the pattern in such a way that it lies at the boundary of a volume (18) in the cornea (5) which, when removed from the cornea (18), produces the desired correction of defective vision. The controller selects the pattern in such a way that the boundary circumscribes a volume formed such that the cornea (5) less the volume (18) has a radius of curvature RCV* which satisfies the following equation: RCV*=1/((1/RCV)+BBR/((nc-1)(1-dHS⋅BBR)))+F, in which RCV is the radius of curvature of the cornea (5) before the volume (18) is removed, nc is the refractive power of the cornea (5) tissue, F is a factor, BBR is the refractive power of spectacles (17) capable of correcting defective vision, and dHS is the distance from the corneal apex at which the spectacles (17) having the refractive power BBR would have to be located for the spectacles (17) to achieve the desired correction of defective vision.