Device for laser-optical eye surgery

Abstract

A device for laser-optical eye surgery includes a source (10) of pulsed femtosecond laser radiation and also optical components (12, 14, 16) for guiding the las er radiation and focusing the same ontoa treatment location on or in the eye (28), the optical components including a plurality of lenses (18, 20) arranged in succession in the beam path of the laser radiation. In accordance with the invention, at least one (18) of the lenses is arranged so as to be adjustable relative to other lens es in the direction of the beam path. In particular, the adjustable lens is a first diverging lens of beam-expansion optics (12). An actuating arrangement (24) is assigned to the adjustable lens for its adjustment, for the control of which arrangement a control unit (26) is provided which is set up toaccess measured data concerning the topography of a surface of the eye and to control the actuating arrangement in a manner depending on the measured surface topography. The laser device enables the abandonment of a contact lens to be placed onto the eye.

Description

technical field [0001] The present invention relates to a device for laser optical eye surgery. Background technique [0002] Lasers are used in eye surgery in a variety of ways. For example, in refractive eye surgery to eliminate visual disturbances in the eye, it is often necessary to introduce an incision in the cornea or lens. A common technique for this is the so-called femtosecond laser correction of myopia (LASIK). In the case of LASIK (laser in-situ keratomileusis), first a small disc of the lower surface is cut from the cornea. This small disc, labeled in the art as a flap, remains attached to the remaining epithelial tissue in the junctional area; the flap is folded aside in this way to expose the underlying tissue area of ​​the cornea. Material is then ablated from the substrate by an excimer laser according to the previously determined ablation profile. After the previous procedure, the flat is folded back and sutured with the remaining tissue in a relatively...

AI Technical Summary

Problems solved by technology

However, even with such lenses, deformation of the eye cannot be completely avoided

Furthermore, a concave contact lens usually has a negative impact on the quality of the beam focus

The curved interface between the contact lens and the cornea can cause, for example, comatic distortions, which in turn can adversely affect the quality of the incision

Images