VORRICHTUNG ZUR SCHONENDEN UND EXAKTEN PHOTOABLATION FUER PHOTOREFRAKTIVE CHIRURGIE

摘要

The description relates to a device for photoablation, especially for photorefractive surgery, with a pulsed laser system (1), the laser beam of which is directed on a region to be ablated (5). The invention is characterized in that there is a beam splitter (4) in the beam path of the laser system (1) in front of the region to be ablated and that in the path of the partial beam (6b) emitted from the beam splitter (4) which is not directed on the region to be ablated (5) there is a film-like material (7), the ablation properties of which are comparable to the material of the region to be ablated (5), and behind the film-like material (7) there is at least one photosensor (9), the output signal from which is applied to a control unit (10) which stops further laser pulses when the photosensor (9) is irradiated.