High-order optical correction during corneal laser surgery

Details High-order optical correction during corneal laser surgery High-order optical correction during corneal laser surgery

A - Human Necessities

61

F

A61F 9/01 (2006.01)

Patent

CA 2721743

Systems and methods related to corneal ablation for treatment of one or more high-order optical aberrations are provided. A method includes providing a defect-correcting prescription (92, 132), determining an ablation profile (98, 138) to impose the prescription on the cornea, and determining a sequence of laser-energy ablations (106, 146) to impose the ablation profile (98, 138) on the cornea. The prescription comprises a high-order optical correction. The ablation profile (98, 138) comprises a first-segment profile and a second-segment profile. The second-segment profile corresponds to at least one high-order optical correction. The ablation sequence (106, 146) comprises applying ablations corresponding to the first-segment profile prior to applying ablations corresponding to the second-segment profile.

La présente invention concerne des systèmes et des procédés se rapportant à une ablation cornéenne pour le traitement d'une ou de plusieurs aberrations optiques d'ordre élevé. Selon l'invention, un procédé consiste à fournir une prescription de correction de défaut (92, 132), à déterminer un profil d'ablation (98, 138) en vue de poser la prescription sur la cornée, et à déterminer une séquence d'ablations à énergie laser (106, 146) pour poser le profil d'ablation (98, 138) sur la cornée. La prescription consiste en une correction optique d'ordre élevé. Le profil d'ablation (98, 138) consiste en un profil de premier segment et en un profil de second segment. Le profil de second segment correspond à au moins une correction optique d'ordre élevé. La séquence d'ablations (106, 146) consiste à appliquer des ablations correspondant au profil de premier segment avant d'appliquer des ablations correspondant au profil de second segment.

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