Foldable intraocular lens and method of making

A - Human Necessities – 61 – F

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A61F 2/16 (2006.01)

Patent

CA 2548735

A foldable intraocular lens(10) for providing vision contains an optic body (11) that includes an optical zone(12) and a peripheral zone (13) entirely surrounding the optical zone. The optic body has an anterior face (14), a substantially opposing posterior face (18), an optic edge (20), and an optical axis (22). The anterior face comprises a central face (24), a peripheral face (28), and a recessed annular face (30) therebetween that is disposed posterior to the peripheral face. The intraocular lens further comprises at least one haptic (32) that is integrally formed with the peripheral zone. The haptic comprises a distal posterior face (34), a proximal prosterior face (38), and a step edge (39) disposed at a boundary therebetween. The haptic further comprises a side edge (40) disposed between the optic edge and the step edge. The proximal posterior face and the posterior face of the optic body form a continuous surface (48). An edge corner (50) is formed by the intersection of the continuous surface with the optic edge, the side edge, and the step edge.

L'invention concerne une lentille intraoculaire pliable permettant de conférer la vision et présentant un corps optique renfermant une zone optique et une zone périphérique entourant totalement la zone optique. Le corps optique comprend une surface antérieure, une surface postérieure sensiblement opposée, un bord optique et un axe optique. La surface antérieure comprend une surface centrale, une surface périphérique et une surface annulaire évidée entre celles-ci, laquelle est disposée de manière postérieure à la surface périphérique. La lentille intraoculaire comprend également au moins un haptique formé d'une seule pièce avec la zone périphérique. Le haptique comprend une surface postérieure distale, une surface postérieure proximale et un bord en gradin disposé au niveau d'une limite entre celles-ci. Le haptique comprend également un bord latéral disposé entre le bord optique et le bord en gradin. La surface postérieure proximale et la surface postérieure du corps optique forment une surface continue. Un coin de bord est formé par intersection de la surface continue avec le bord optique, le bord latéral et le bord en gradin.

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