Intraocular lens system

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/16 (2006.01) A61L 27/16 (2006.01) A61L 27/18 (2006.01) A61L 27/52 (2006.01)

Patent

CA 2585890

A two-optic accommodative lens system. The first lens has a negative power and is located posteriorly within the capsular bag and lying against the posterior capsule. The periphery of the first lens is attached to a ring-like structure having a side wall. The second lens is located anteriorly to the first lens within of the capsular bag and is of a positive power. The peripheral edge of the second lens contains a plurality of haptics that are arranged in a spiral pattern and project posteriorly from the second lens and toward the first lens. The haptics are relatively firm, yet still flexible and ride within the side wall of the ring-like structure, so that flattening or steepening of the capsule in reaction to movement of the ciliary muscle and corresponding shrinkage of the capsular bag causes the second lens to move along the optical axis of the lens system.

Divulgation d'un système à lentille adaptive double. La première lentille est une lentille divergente et est située à l'arrière dans la chambre capsulaire, contre la capsule postérieure. La première lentille est attachée à sa périphérie à une structure annulaire ayant une paroi latérale. La seconde lentille est située devant la première à l'intérieur de la chambre capsulaire, et elle est convergente. La zone périphérique de la seconde lentille contient un bon nombre d'haptiques disposées en spirale se projetant vers l'arrière, de la seconde lentille vers la première. Les haptiques sont relativement rigides, mais demeurent cependant assez souples et bougent à l'intérieur de la paroi latérale de la structure annulaire de telle façon que l'aplatissement de la capsule ou l'accentuation de sa forme en réaction au mouvement du muscle ciliaire, et le rétrécissement correspondant de la chambre capsulaire amènent la seconde lentille à se déplacer le long de l'axe optique du système de lentilles.

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