Method and system for improving vision

Details Method and system for improving vision Method and system for improving vision

A - Human Necessities

61

F

A61F 9/013 (2006.01) A61B 3/10 (2006.01) A61B 3/107 (2006.01) A61B 18/18 (2006.01) A61F 2/14 (2006.01) A61F 2/16 (2006.01) A61F 9/00 (2006.01) A61F 9/007 (2006.01) A61F 9/01 (2006.01) G02C 13/00 (2006.01)

Patent

CA 2485508

Methods and apparatus (610)are disclosed for diagnosing vision and improving vision in a manner which does not interfere with the natural shape of the cornea or its orientation relative to the remainder of the eye, but which changes its surface curvature appropriately to achieve the required correction of vision. The focus of the cornea (14) is adjusted so that different regions focus substantially to the same axis and preferably to substantially the same point on the axis. This can be accomplished by shaping the cornea (e.g. through ablation) or by applying an appropriate contact lens or other optical lens. In either case, correcting the central portions of the cornea should have a more significant effect on correcting focus scatter than correcting the more outward portions.

La présente invention se rapporte à des procédés et à un appareil permettant d'établir un diagnostic concernant la vision et d'améliorer la vision d'une manière qui ne perturbe pas la forme naturelle de la cornée ou son orientation par rapport au reste de l'oeil, mais qui modifie sa courbure superficielle de manière appropriée afin d'obtenir la correction souhaitée de la vision. Le foyer de la cornée est ajusté de sorte que différentes régions focalisent sensiblement sur le même axe et de préférence sur sensiblement le même point de cet axe. Ceci peut être effectué par surfaçage de la cornée (par exemple par ablation) ou par application d'une lentille de contact appropriée ou d'une autre lentille optique. Dans tous les cas, la correction des parties centrales de la cornée devrait présenter un effet plus significatif sur la correction de la dispersion du foyer que la correction des parties situées les plus à l'extérieur.

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