Device for LASIK

A technology of excimer laser and cornea, applied in laser surgery, ophthalmic surgery, ophthalmic treatment, etc., can solve unwanted problems

Inactive Publication Date: 2012-02-22
WAVELIGHT GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Often, refractive ablation, the purposeful removal of corneal tissue for the purpose of reshaping the cornea with the desired imaging properties, does also remove the unwanted grating structures described above, but generally this Effective in areas of the cornea where a relatively "large" amount of tissue has been remo

Method used

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  • Device for LASIK
  • Device for LASIK
  • Device for LASIK

Examples

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Embodiment Construction

[0031] figure 1 An arrangement is shown for femtosecond LASIK, where two different sets of laser irradiation sources are typically used, a first laser irradiation source aimed at generating the femtosecond pulses used to perform valve ablation with a light burst and another laser irradiation source intended to generate A second source of laser irradiation pulses of another type of laser irradiation pulse having a lower energy density for performing corneal tissue ablation. In the art, two different laser irradiation systems are usually configured for this purpose, with separate optics for eye-related beam shaping and beam guidance, which alternatively (with respect to each other) space independently) aimed at the eye to be treated. But when figure 1 In , for the sake of simplification, the two systems are represented in actual combination.

[0032] The first laser irradiation source 12 is used to generate femtosecond pulses 14 , known per se in the art, the energy density o...

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Abstract

The invention relates to a device for LASIK having the following: a first laser radiation source (12) for generating first laser radiation pulses (14) having a power density for bringing about disruption of the corneal tissue; first means (24, 44, K) for guiding and shaping the first laser radiation pulses into the corneal tissue; a second laser radiation source (46) for generating second laser radiation pulses (48) having a power density for bringing about ablation of corneal tissues; second means (40, 42, 44, 24) for guiding and shaping the second laser radiation pulses relative to the cornea; a controller (50) having a first processing program (56a) for controlling the first means and the first laser radiation pulses for generating a cut (72) in the cornea (60; and having a second processing program (56b) for controlling the second means and the second laser radiation pulses for reshaping and modified the imaging properties of the cornea, wherein the first processing program generates regular corneal surface structures causing a rainbow effect in the imaging properties of the cornea; and a third processing program (56c) controlling the second means and the second laser radiation pulses for removing the indicated regular structures (68).

Description

technical field [0001] The present invention relates to devices and methods for laser in situ keratomileusis (LASIK). Background technique [0002] In refractive eye surgery, visual defects are corrected or mitigated by intervening on the patient's eye to change the refractive and imaging properties of the eye. Specifically, LASIK surgery is known to reshape the cornea of ​​the eye. In traditional LASIK surgery, the first step is to use a mechanical keratotome to create a flat corneal incision to create a so-called valve, which remains firmly attached to the cornea at one end so that it can be turned up to expose the underlying corneal tissue (stroma). Subsequently, ablation (ie, removal of tissue) is performed in the exposed stroma, usually using excimer laser irradiation, and the valve is inverted and healed. The epithelium is largely spared during this procedure, and the healing process is relatively quick and painless. In a traditional mechanical keratotome, a sharp b...

Claims

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Application Information

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IPC IPC(8): A61F9/01
CPCA61F9/008A61F9/00804A61F9/00836A61F2009/00872
Inventor 克里斯蒂安·维尔纳克劳斯·沃格勒克里斯托夫·德尼茨基
Owner WAVELIGHT GMBH
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