Multifocal accommodating intraocular lens

A - Human Necessities – 61 – F

Patent

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A61F 2/16 (2006.01)

Patent

CA 2674018

An intraocular lens for providing accommodative visions to a subject includes an adjustable optic and a haptic that is operably coupled to the optic. The adjustable optic comprises an optical axis, a central zone disposed about the optical axis, and an annular zone surrounding the central zone. The optic may also comprise additional annular zones disposed about the central zone and the first annular zone. The haptic comprises a transparent portion protruding into the adjustable optic. The intraocular lens has a disaccommodative configuration in which the central zone has a base optical power and an accommodative configuration in which the central zone has an add optical power that is at least about 1 Diopter greater than the base optical power, preferably at least about 2 Diopters greater than the base optical power. In some embodiments, the add optical power is at least 3 Diopters, or even 4 Diopters, greater than the base optical power. The central zone and the annular zone have different optical powers when the adjustable intraocular lens is in the accommodative configuration and/or when the adjustable intraocular lens is in the disaccommodative configuration.

L'invention concerne une lentille intraoculaire pour transmettre des visions accommodatives à un sujet qui comprend un optique ajustable et un haptique qui est couplé de manière fonctionnelle à l'optique. L'optique ajustable comprend un axe optique, une zone centrale disposée autour de l'axe optique, et une zone annulaire entourant la zone centrale. L'optique peut également comprendre des zones annulaires supplémentaires disposées autour de la zone centrale et de la première zone annulaire. L'haptique comprend une partie transparente faisant saillie dans l'optique ajustable. La lentille intraoculaire a une configuration non accommodative dans laquelle la zone centrale a une puissance optique de base et une configuration accommodative dans laquelle la zone centrale a une autre puissance optique additionnelle qui est supérieure à la puissance optique de base d'au moins environ une dioptrie, de préférence supérieure à la puissance optique de base d'au moins environ 2 dioptries. Dans certains modes de réalisation, la puissance optique additionnelle est supérieure à la puissance optique de base d'au moins 3 dioptries, voire 4 dioptries. La zone centrale et la zone annulaire ont des puissances optiques différentes lorsque la lentille intraoculaire ajustable est en configuration accommodative et/ou lorsque la lentille intraoculaire ajustable est en configuration non accommodative.

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