Blend and transition zones for corneal ablations

A - Human Necessities – 61 – F

Patent

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A61F 9/007 (2006.01)

Patent

CA 2478418

Methods, devices, and systems for reprofiling a surface of a cornea (104) of an eye ablate a portion of the cornea to create an ablation zone (103) with an optically correct central optical zone (110) disposed in a central portion of the cornea, and a blend zone disposed peripherally to the central optical zone and at least partially within an optical zone (108) of the eye. The blend zone can have an optical power that gradually diminishes with increasing radius from the central optical zone.

La présente invention concerne des méthodes, des dispositifs et des systèmes de remodelage de la surface de la cornée d'un oeil par ablation d'une partie de la cornée pour créer une zone d'ablation présentant une zone optique centrale correcte d'un point de vue optique située au niveau de la partie centrale de la cornée, et une zone de mélange située à la périphérie de la zone optique centrale et au moins située en partie à l'intérieur d'une zone optique de l'oeil. Le zone de mélange peut présenter une puissance optique qui diminue graduellement avec l'augmentation du rayon par rapport à la zone optique centrale.

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