A lens having an optically controlled peripheral portion and...

G - Physics – 02 – C

Patent

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G02C 7/04 (2006.01) A61F 2/16 (2006.01)

Patent

CA 2665642

A contact lens or phakic IOC lens is provided with a peripheral portion that has a power profile that provides optical control of peripheral vision images. Typically, the central portion of the lens is also provided with optical control. The power profile of the lens at the boundary of the central and peripheral portions meets certain boundary conditions that ensure that the lens provides a desired or selected vision correction. Because the peripheral portion of the lens provides optical control that defocuses the peripheral vision image relative to the retina, the lens can be used to prevent or inhibit growth of the eye, thereby preventing or inhibiting myopia or the effects of myopia.

L'invention concerne une lentille de contact ou une lentille phakique IOC munie d'une partie périphérique avec un profil de puissance qui fournit un contrôle optique des images de vision périphérique. Typiquement, la partie centrale de la lentille est également contrôlée optiquement. Le profil de puissance de la lentille à la limite des parties centrale et périphérique rencontre certaines conditions de limite qui assurent que la lentille fournisse une correction de la vision souhaitée ou choisie. Puisque la partie périphérique de la lentille fournit le contrôle optique qui défocalise l'image de vision périphérique par rapport à la rétine, la lentille peut être utilisée pour empêcher ou inhiber la croissance de l'oeil, en empêchant ou inhibant ainsi une myopie ou les effets de la myopie.

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