Understanding the accommodating intraocular lens
1 is a top view of a lens embodying the present invention; FIG. The lens 9 is formed of materials which are biologically inert, i.e., not susceptible to being absorbed by the body fluids and capable of being well tolerated by the human body when implanted.2 is a cross-sectional view taken along line 2--2 of FIG. 3 is a cross-sectional view of the eye showing the lens in situ; FIG. Exemplary of rigid materials is polymethyl methacrylate, hereinafter referred to as PMMA.An eye implant has an optical lens anteriorly convex and posteriorly planar supported on two diametrically opposed coplanar feet through two supporting members forming an arch.
The lens is formed of a rigid biologically inert material.Arches 8 are in the form of a medial slice out of an inverted disk which has a flat bottom.In such structure, the parallel sides 19 are tangent to the circumference of the lens 9.In an eye implant having an optical lens anteriorly convex and posteriorly planar supported on two diametrically opposed coplanar feet through two supporting members forming a substantially continuous arched surface, each supporting member being unitary with said lens and rooted in one of said feet outside the perimeter of said lens and supporting said lens with the posterior thereof anterior to the plane of said feet, the improvement comprising said lens being formed of a rigidly biologically inert material, and said supporting members being formed of soft biologically supporting hydrogel material to provide structure which, when fixed into the eye, moves said lens anteriorly only along the axis of the eye when forces are applied to said feet upon contraction of the ciliary body.(b) coplanar oppositely directed feet extending from opposite ends of said support, of dimension to extend to the boundary of the anterior chamber of the eye, and shaped to fix the position thereof into the eye, and(c) a lens formed in said structural support anteriorly convex and posteriorly shaped for substantial clearance above the plane of said feet and of hard biologically inert lens material and movable only away from the iris of the eye along the axis of the eye upon bending of said support in response to contraction of the ciliary body.Over the past two decades, operation techniques and lens structures have been developed which, when suitably handled, restore vision to eyes blinded by cataracts.