Patent ID: 7867224

Claim:
A laser system comprising: a laser source generating a laser beam, wherein the laser source is adapted for medical removal of body tissue by the laser beam within a predetermined treatment contour; a guide frame providing a central axis, an outer circumferential surface and, on a side of the guide frame that is facing the body tissue, a circumferentially extending edge, wherein the circumferentially extending edge is pointed and defines a base surface of the guide frame matching exactly the shape of the treatment contour; wherein the outer circumferential surface of the guide frame has a cross-section that is identical to the base surface and the treatment contour; wherein the laser beam is provided with a focus that relative to the central axis is at least approximately positioned on the base surface of the guide frame; a scanner being adapted for completely scanning said base surface of the guide frame with the laser beam for removing the body tissue, wherein the scanner has a mirror and the mirror is arranged near a central axis of the guide frame, wherein a maximum deflection angle is adjusted such that the laser beam, oriented at a slant outwardly away from the central axis impinges on the pointed edge, thereby causing a recess in the body tissue exactly within the contour that is defined by the base surface of the guide frame in such a way that the guide frame can be successively inserted into said recess with increasing depth of body tissue removal, wherein the focus migrates on said base surface without leaving noticeably said base surface in the direction of the central axis; wherein the guide frame is adapted to be guided by said outer circumferential surface within an outer circumferential surface of the recess in the direction of the central axis of the guide frame and thereby being secured with respect to lateral displacement; wherein the scanner is arranged between the laser source and the guide frame in a path of the laser beam.