Patent ID: 8070806
Filing Date: 2011-12-06
Classification: A61F

Abstract:
1. An accommodative intra-ocular lens, said accommodative intra-ocular lens being deformable between an unaccommodating configuration and an accommodating configuration, said accommodative intra-ocular lens being implantable within a mammalian eye including a retina, a ciliary muscle, a vitreous chamber located posteriorly towards said retina relatively to said lens said lens and a vitreous fluid contained within said vitreous chamber, said vitreous fluid defining a vitreous fluid pressure that increases upon contraction of said ciliary muscle and decreases upon relaxation of said ciliary muscle; said accommodative intra-ocular lens comprising: a lens first portion and a lens second portion for being positioned respectively anteriorly and posteriorly relative to each other when said accommodative intra-ocular lens is inserted in said mammalian eye; said lens first portion defining a first portion inner surface and an opposed first portion outer surface and a first portion thickness extending therebetween; said lens second portion defining a second portion inner surface and an opposed second portion outer surface and a second portion thickness extending therebetween; said lens first portion defining a substantially centrally disposed first portion central section and a first portion peripheral section extending radially from said first portion central section to a radially outwardmost first section peripheral edge; said first portion central and peripheral sections respectively defining a first central radius of curvature and a first peripheral radius of curvature and said first portion central section being relatively more easily deformable than said first portion peripheral section and said first portion thickness being substantially smaller about said first portion central section than about said first portion peripheral section, the first portion thickness increasing substantially gradually from said first portion central section to said first peripheral edge; said lens second portion defining a substantially centrally disposed second portion central section and a second portion peripheral section extending radially from said second portion central section to a radially outwardmost second section peripheral edge; said second portion central and peripheral sections respectively defining a second central radius of curvature and a second peripheral radius of curvature; said lens first and second portions being substantially sealingly joined together about their respective first and second portion peripheral edges and configured so as to define a lens internal volume therebetween; said lens internal volume being filled with a substantially incompressible lens internal fluid; said lens internal fluid defining a variable internal fluid pressure exerted on said first and second portion inner surfaces; said accommodative intra-ocular lens being configured such that both said first central radius of curvature and said first peripheral radius of curvature will decrease upon an increase in internal fluid pressure and both said first central radius of curvature and said first peripheral radius of curvature will increase upon a decrease in internal fluid pressure; wherein said accommodative intra-ocular lens is deformable between said unaccommodating and accommodating configurations respectively upon the relaxation and contraction of said ciliary muscle and wherein the cross-sectional configuration of said first portion outer surface corresponds substantially to the equation: y the cross-sectional configuration of said first portion inner surface corresponds substantially to the equation: y