Haptic for accommodating intraocular lens

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/16 (2006.01)

Patent

CA 2673829

An intraocular lens is disclosed, with an optic that changes shape in response to a deforming force exerted by the zonules of the eye. A haptic supports the optic around its equator and couples the optic to the capsular bag of the eye. The region of contact between the optic and the haptic extends into the edge of the optic, similar to the interface between a bicycle tire and the rim that holds it in place. The haptic may be stiffer than the optic. The haptic may have the same refractive index as the optic. The haptic may include a saddle-shaped portion in contact with the adjustable optic, with a convex profile along an optical axis; and a concave profile in a plane perpendicular to the optical axis.

La présente invention concerne une lentille intraoculaire, avec un élément optique qui change de forme en réponse à une force de déformation exercée par les zonules de l'AEil. Un élément haptique supporte l'élément optique au niveau de son cercle équatorial et couple l'élément optique à la poche capsulaire de l'AEil. La région de contact entre l'élément optique et l'élément haptique s'étend à l'intérieur du pourtour de l'élément optique, similaire à l'interface entre un pneu de bicyclette et la jante qui le maintient en place. L'élément haptique peut être plus rigide que l'élément optique. L'élément haptique peut avoir le même indice de réfraction que l'élément optique. L'élément haptique peut comprendre une partie en forme de selle en contact avec l'élément optique ajustable, avec un profil convexe le long de l'axe optique ; et un profil concave dans un plan perpendiculaire à l'axe optique.

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