Device for ophthalmologic, particularly refractive, laser surgery

A technology of ophthalmic laser and laser surgery, which is applied in laser surgery, ophthalmic surgery, lasers, etc., and can solve problems such as the direction and degree of wrong positioning

Active Publication Date: 2011-05-25
ALCON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The aforementioned difficulty for the treating physician in accurately assessing the direction and extent of the patient's mispositioning based on the reflected ima

Method used

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  • Device for ophthalmologic, particularly refractive, laser surgery
  • Device for ophthalmologic, particularly refractive, laser surgery

Examples

Experimental program
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Embodiment Construction

[0020] First shown in the figure is a human eye 10 with a cornea 12 and a pupillary limbus 14 .

[0021] The laser surgery device shown exhibits in a known manner a fixed light source (eg LED, laser) 18 which emits a (weak) fixed light beam 18' which is viewed by the patient for the purpose of fixing the eye.

[0022] In addition, the laser surgery device comprises a therapeutic laser 20 which emits a therapeutic laser beam 20' directed via a lens 22 to a pair of scanning mirrors 24, 24' and deflected via a partially transmissive deflecting mirror 26 to the eye 10 on. The treatment laser beam 20' is a focused laser beam; the focusing optics for focusing the treatment laser beam 20' are not shown in any detail in the figures. However, suitable focusing optics are sufficiently known in the state of the art.

[0023]The laser 20 is, for example, an excimer laser, and its radiation wavelength is in the UV region, for example, 193 nm. It should be understood that other therapeut...

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PUM

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Abstract

A device for ophthalmologic, particularly refractive, laser surgery comprises a laser beam source (20) for emitting a focused treatment laser beam (200) and an optical coherence interferometric measuring apparatus (34), for example an OLCR pachymeter, for measuring the z-position of a predetermined point of an eye to be treated in the coordinate system of the laser surgery device. A processor (C) used as an evaluation and control unit is equipped to assess on the basis of the measured z-position as to whether a desired treatment location of the eye in the z-direction coincides with the focal plane of the treatment laser beam or is offset therefrom. Depending on whether or not the patient is correctly positioned with respect to the focal plane, the processor (C) can cause a series of reactions.

Description

technical field [0001] The present invention relates to devices for ophthalmic laser surgery, especially refractive laser surgery. Background technique [0002] There are various methods of treatment in surgery involving the human eye in which laser radiation is directed onto the eye to achieve a desired therapeutic purpose as a result of the interaction of the radiated laser radiation with the eye. In the case of refractive laser surgery, the aim of the treatment is to change the imaging properties of the optical system formed by the eye by means of laser radiation. Since the cornea is first and foremost essential to the imaging properties of the human eye, refractive laser surgery of the eye includes treatment of the cornea in many cases. In these procedures, changes are brought about in the shape of the cornea by the introduction of targeted incisions and / or the targeted removal of material; hence the term reshaping by some. [0003] A known example of reshaping the cor...

Claims

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Application Information

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IPC IPC(8): A61F9/01
CPCA61F2009/00872A61F2009/0087A61F9/00802A61F2009/00846A61F9/008A61F9/00825A61F2009/00851A61F9/013H01S3/101
Inventor 彼得·里德尔克里斯托夫·德尼茨基
Owner ALCON INC
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