Uniform large area ablation system and method

Details Uniform large area ablation system and method Uniform large area ablation system and method

A - Human Necessities

61

F

A61F 9/008 (2006.01) A61F 9/01 (2006.01)

Patent

CA 2388798

Methods and devices for performing corrective eye surgery generally direct a laser beam at a target region of a patient's eye (118) with the laser beam (114) having a non-uniform energy distribution profile. As ablation rates vary locally across the beam cross-section (34), the energy distribution profile is tailored to effect a uniform ablation depth (20) with each laser pulse of an excimer laser system.

La présente invention concerne des procédés et dispositifs permettant de réaliser de la chirurgie ophtalmologique corrective en envoyant un faisceau laser vers une région cible de l'oeil du patient (118), et en utilisant pour cela un faisceau laser (114) dont le profil de distribution d'énergie n'est pas uniforme. Etant donné que les rapports d'ablation varient localement sur toute la coupe du faisceau (34), on adapte le profil de distribution d'énergie de façon à obtenir une profondeur d'ablation uniforme (20) pour chaque impulsion laser d'un système à laser excimère.

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