Laminate optic with interior Fresnel lens

Claim 2

Composite intraocular lens for insertion through an incision in an eye, which comprises a generally flat, partially hollow, unitary laminate optic, formed by a pair of opposed, relatively thin, sheet-like elements of conforming perimetric shape and of selective index of refraction, and having a corresponding pair of opposed interior surfaces, at least one of the elements comprising a protected Fresnel lens defining the interior surface of the element as a discontinuous surface formation including a concentric series of annular prisms composed of optical step areas interconnected by offset riser areas, and the interior surfaces being peripherally sealed together to define therebetween a counterpart concentric series of permanent captive gas enclosing, liquid free, annular spaces of different index of refraction from the selective index of refraction of the elements, and which collectively form a permanently sealed, leakproof, captive gas chamber which internally protects said Fresnel lens from any contact with the surrounding aqueous humor environment in the eye interior.

Claim 3

Lens of claim 1 wherein one of the elements comprises a wafer thin Fresnel lens and the other of the elements comprises a wafer thin cover for the Fresnel lens.

Claim 4

Lens of claim 1 wherein the two elements comprise coacting wafer thin Fresnel lenses.

Claim 5

Lens of claim 1 wherein a slight optical curvature is formed on the exterior of at least one of the elements.

Claim 6

Lens of claim 1 wherein the two elements have substantially the same index of refraction.

Claim 7

Lens of claim 1 wherein air is enclosed in the annular spaces as captive gas.

Claim 8

Lens of claim 1 wherein the elements are formed of flexible, temporarily deformable material.

Claim 9

Composite intraocular lens for insertion through an incision in an eye, which comprises a generally flat, partially hollow, unitary laminate optic, formed by a pair of opposed, relatively thin, sheet-like elements of flexible, temporarily deformable material, of conforming perimetric shape and of selective index of refraction, and having a corresponding pair of opposed interior surfaces, at least one of the elements comprising a protected Fresnel lens defining the interior surface of the element as a discontinuous surface formation including a concentric series of annular prisms composed of optical step areas interconnected by offset riser areas, the interior surfaces being peripherally sealed together to define therebetween a counterpart concentric series of permanent captive gas enclosing, liquid free, annular spaces of different index of refraction from the selective index of refraction of the elements, and which collectively form a permanently sealed, leakproof, captive gas chamber which internally protects said Fresnel lens from any contact with the surrounding aqueous humor environment in the eye interior, and the elements together being sized to provide the optic with a comparatively thin thickness in relation to its diameter sufficiently to permit temporary deformation of the optic into a generally cylindrical shape of reduced apparent girth capable of insertion into the eye through a minimum size incision.

Claim 10

Composite intraocular lens for insertion through an incision in an eye, which comprises a generally flat, partially hollow, unitary laminate optic, formed by a pair of opposed, relatively thin, sheet-like elements of flexible, temporarily deformable material, of conforming perimetric shape and of selective index of refraction, and having a corresponding pair of opposed interior surfaces, at least one of the elements comprising a protected Fresnel lens defining the interior surface of the element as a discontinuous surface formation including a concentric series of annular prisms composed of optical step areas interconnected by offset riser areas, the interior surfaces being peripherally sealed together to define therebetween a counterpart concentric series of permanent captive gas enclosing, liquid free, annular spaces of different index of refraction from the selective index of refraction of the elements, and which collectively form a permanently sealed, leakproof, captive gas chamber which internally protects said Fresnel lens from any contact with the surrounding aqueous humor environment in the eye interior, and the elements together being sized to provide the optic with a comparatively thin thickness in relation to its diameter sufficiently to permit temporary deformation of the optic into a generally cylindrical shape of reduced apparent girth capable of insertion into the eye through a minimum size incision.

Claim 11

Lens of claim 8 wherein one of the elements comprises a wafer thin Fresnel lens and the other of the elements comprises a wafer thin cover for the Fresnel lens.

Claim 12

Lens of claim 8 wherein the two elements comprise coacting wafer thin Fresnel lenses.

Claim 13

Lens of claim 8 wherein a slight optical curvature is formed on the exterior of at least one of the elements.

Claim 14

Lens of claim 8 wherein the two elements have substantially the same index of refraction.

Claim 15

Lens of claim 8 wherein air is enclosed in the annular spaces as captive gas.

Claim 16

Lens of claim 8 wherein the optic has a thickness of at most about 1.5-2 mm and a diameter of at most about 6 mm.

Claim 17

Lens of claim 8 wherein the optic is provided with haptics of flexible, temporarily deformable material.