System for laser surgical ophthalmology

Abstract

The invention relates to a system for laser surgical ophthalmology, comprising a source (110) of pulsed laser radiation having radiation parameters tuned for applying an incision in an eye tissue, particularly in the cornea, a scanner (160) for deflecting the laser radiation, and electronic control unit (190) set up for controlling the scanner according to a prescribed cut geometry, and a modulator unit (170) for modulating the laser pulse emitted by the source (110). The control unit (190) is further set up for controlling the modulator unit (170) according to a radiation deflection pattern determined for the cut geometry, such that at least one part of the laser pulse has a reduced pulse energy or is suppressed in predetermined parts of the radiation deflection pattern.

Description

technical field

[0001] The present invention relates to systems for ophthalmic laser surgery. Background technique

[0002] In refractive eye surgery, vision defects are corrected by intervention in the patient's eye to alter the refractive properties of the eye. In this regard, the so-called LASIK procedure (Laser In Situ Keratomileusis) is of great importance, in which first a planar corneal incision is made, as a result of which a small disc cap called a flap is produced. The flap can be folded aside to expose the underlying corneal tissue, the stroma. The stromal tissue is then ablated using a laser (usually an excimer laser) according to the resection pattern determined for each patient. The flap is then folded back; the wound heals relatively quickly.

[0003] For flap cutting during LASIK, the previously used mechanical microkeratome has recently been replaced by femtosecond lasers, ie lasers that generate pulsed laser radiation with pulse durations in the femtosec...

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