Device for laser-optical eye surgery

An ophthalmic surgery, optical device technology, applied in laser surgery, ophthalmic surgery, parts of surgical instruments, etc., can solve problems such as beam focusing quality influence, hair distortion, eye deformation, etc.

Active Publication Date: 2012-12-05
ALCON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Device for laser-optical eye surgery
  • Device for laser-optical eye surgery
  • Device for laser-optical eye surgery

Examples

Experimental program
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Embodiment Construction

[0024] figure 1 The laser device for eye surgery shown in includes a laser generator 10 which generates and outputs a pulsed laser beam with a pulse time in the femtosecond range. The term "femtosecond" here is to be interpreted broadly; it should not be interpreted as expressly defining a pulse duration starting at 1 ps (picosecond). On the contrary: the invention is in principle also suitable for pulse durations greater than 1 ps (picosecond). The said pulse duration is in the femtosecond range (fs range), to some extent just means that the femtosecond lasers (fs lasers) used in eye surgery usually have a relatively small focus size, for example, the focus diameter is the largest 5 μm, the Rayleigh length is at most 10 μm, and the invention shows its advantages especially in the case of small focus sizes. However, the pulse duration of the laser radiation is preferably below 1 ps, eg in the three-digit femtoseconds range.

[0025] The pulse repetition frequency of the las...

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PUM

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Abstract

The device has a laser generator (10) emitting pulsed femtosecond laser radiation and optical components e.g. scanner (14), for guiding and focusing the radiation onto a treatment location on an eye (28). The components have a diffuser lens (18) and a converging lens (20) arranged in succession in the beam path of the radiation. An actuating drive (24) i.e. actuating drive, is assigned to the lens (18) for adjustment of the lenses. A control unit (26) accesses data concerning topography of a surface of the eye and controls the drive depending on the measured surface topography. An independent claim is also included for a control method for a laser device for laser-optical eye surgery.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F9/008
CPCA61F2009/00882A61F9/00836A61F9/008A61F2009/00872A61B18/20
Inventor 克劳斯·福格勒奥拉夫·基特尔曼
Owner ALCON INC
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