Laser beam ophthalmological surgery method and apparatus

Details Laser beam ophthalmological surgery method and apparatus Laser beam ophthalmological surgery method and apparatus

A - Human Necessities

61

N

A61N 5/06 (2006.01) A61F 9/01 (2006.01) A61B 17/00 (2006.01) A61B 18/20 (2006.01)

Patent

CA 2207320

A laser beam ophthalmological surgery method includes the steps of generating a laser beam (12) and splitting the generated laser beam (12) into multiple laser beams (14, 15) which are simultaneously focused onto a plurality of scanners (16, 21, 45, 46, 48, 50). Each scanner (16, 21, 45, 46, 48, 50) in turn produces a predetermined scanning pattern focused on the cornea (20) of a patient's eye (24) to ablate the cornea tissue and with at least two beams (25, 26) simultaneously scanning and ablating the cornea tissue. Scanning is controlled from a central processing unit (27) to perform the surgical procedure, removing a laser thickness of the cornear tissue to provide a safer and more predictable surgical procedure in the reshaping of the cornea. A laser ophthalmological surgery apparatus (10) is provided which includes a laser (11) generating a laser beam (12), a beam splitter (13, 44) for splitting the laser beam (12) into a plurality of laser beams (14, 15), and a plurality of scanners (16, 21, 45, 46, 48, 50), each positioned for receiving one of the laser beams from the beam splitter (13, 44) and producing a predetermined scanning pattern from the laser beam (12) and impinging the scanning pattern upon the cornea (20) of a patient's eye (24).

L'invention porte sur un procédé de chirurgie laser de l'oeil comportant les étapes suivantes: produire un faisceau laser (12) principal, le diviser en de multiples faisceaux secondaires (14, 15), qui sont focalisés simultanément sur une multitude de scanners (16, 21, 45, 46, 48, 50). Chacun des scanners (16, 21, 45, 46, 48, 50) produit tour à tour un schéma de balayage donné focalisé sur la cornée (20) de l'oeil (24) du patient pour procéder à l'ablation du tissu cornéen en utilisant au moins deux lasers (25, 26): l'un pour le balayage et l'autre pour l'ablation des tissus cornéens. Le balayage est commandé par un processeur central (27) qui dirige la procédure chirurgicale d'élimination d'une épaisseur laser du tissu cornéen et de remodelage de la cornée avec plus de sûreté et un meilleur respect des prévisions. L'invention porte également sur un système laser (10) de chirurgie de l'oeil comportant: un laser (11) produisant un faisceau (12), un diviseur de faisceau (13, 14) le divisant en plusieurs faisceaux (14, 15) secondaires, et plusieurs scanners (16, 21, 45, 46, 48, 50) positionnés de manière à recevoir chacun l'un des faisceaux du diviseur (13, 14) et produisant chacun un schéma de balayage prédéterminé du faisceau correspondant (12) qui vient frapper la cornée (20) de l'oeil (24) du patient.

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