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Systems for Ophthalmic Laser Surgery

An ophthalmic laser and surgery technology, applied in the system field of ophthalmic laser surgery, can solve the problem that the thermal damage of corneal tissue cannot be ruled out

Active Publication Date: 2016-04-06
ALCON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adjacent foci may then no longer be clearly separated from each other, but are so close together that thermal damage to corneal tissue due to local excess radiation of energy cannot be ruled out

Method used

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  • Systems for Ophthalmic Laser Surgery
  • Systems for Ophthalmic Laser Surgery
  • Systems for Ophthalmic Laser Surgery

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Embodiment Construction

[0027] The full text is referred to by 100 and in figure 1 The system shown in schematic block diagram representation in , is a laser system suitable for internal tissue cutting in a patient's eye. Intracorneal flap ablation for creating a LASIK flap is one possible and preferred example of an ablation for which laser system 100 is suitable. However, this does not preclude the use of laser system 100 for other forms of tissue cutting in the eye.

[0028] The laser system 100 includes a laser oscillator 110 which emits laser pulses in a free-running manner with a duration in the femtosecond range and a defined repetition rate. The laser oscillator 110 may be, for example, a solid-state laser oscillator, more specifically a fiber laser oscillator. The pulses emitted by the laser oscillator 110 pass through a preamplifier device 120 which increases the pulse power. At the same time, the preamplifier device 120 causes pulse time stretching. The repetition rate of the laser pul...

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Abstract

The invention relates to a system for ophthalmic laser surgery. The system comprises a pulse laser radiation source (110), a scanner (160), an electronic control unit (190) and a modulator unit (170). The pulse laser radiation source (110) has radiation parameters which meet requirements for cutting operation on ocular tissue (especially cornea); the scanner (160) is used for realizing deflection of laser radiation; the electronic control unit (190) is arranged for controlling the scanner according to preset cutting geometric figures; the modulator unit (170) is used for modulating laser pulse radiating from the pulse laser radiation source (110). Further, the electronic control unit (190) is particularly arranged for controlling the modulator unit (170) according to beam-deflection patterns determined according to the cutting geometric figures so that at least part of the laser pulse in the preset area of the beam-deflection patterns has low pulse energy or is suppressed.

Description

[0001] This application is a divisional application of an invention with a filing date of May 26, 2009, application number 200980159515.3 (international application number PCT / EP2009 / 003730) and an invention titled "system for ophthalmic laser surgery". technical field [0002] The present invention relates to systems for ophthalmic laser surgery. Background technique [0003] 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 created. 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; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F9/008
Inventor 奥拉夫·基特尔曼克劳斯·沃格勒
Owner ALCON INC
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