Intrastromal refractive correction systems and methods

A - Human Necessities – 61 – F

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A61F 9/009 (2006.01)

Patent

CA 2645201

Devices, systems, and methods for laser eye surgery selectively ablate tissues within the cornea of an eye along one or more target surfaces, so that corneal tissue bordered by the laser incision surface(s) can be mechanically removed. An appropriate tissue-shaping surface can be selected based on the regular refractive error of the eye, and a shape of the target laser surface(s) can be calculated so as to correct irregular refractive errors of the eye, impose desired additional sphero-cylindrical and/or irregular alterations.

La présente invention concerne des dispositifs, des systèmes, et des procédés de chirurgie oculaire par laser permettant l'ablation de tissus à l'intérieur de la cornée d'un oeil en même temps qu'une ou plusieurs surfaces cibles, de façon qu'à la limite des surfaces de l'incision par le laser, le tissu de cornée puisse être retiré mécaniquement. Connaissant le défaut régulier de réfraction oculaire, il est possible de définir une surface appropriée de mise en forme du tissu, et il est possible de calculer une forme des surfaces de cible du laser de façon à corriger les défauts réguliers de réfraction oculaire, et d'imposer selon les besoins d'autres modifications sphéro-cylindriques et/ou régulières.

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