Foldable accommodating intraocular lens
Accommodating intraocular (AIOL) assemblies for enabling post implantation in situ manual selective displacement of an AIOL along a human eye's visual axis relative to stationary anchor points. Axial displacement may be over a continuous range or alternatively at discrete axial stopping positions typically from about 100 μm to about 300 μm apart. Novels AIOLs designed to be at least partially folded for facilitating insertion into a human eye through a relatively small incision.
1. An accommodating intraocular lens (AIOL) system for implantation in a human eye, comprising:
an accommodating intraocular lens comprising:
a housing defining, at least in part, a cavity, the housing formed of a first material;
an optical element contained within the cavity of the housing, the optical element capable of being deformed from a non-bulging state to a bulging state suitable for near vision, wherein the optical element is formed of a second material that is different from the first material, is flowable, and has a refractive index greater than a refractive index of aqueous humor; and
a piston reciprocally movable relative to the housing between an extended position and a compressed position, wherein the piston is adapted to be responsive to ciliary muscle contraction,
wherein application of a compression force on the optical element by the piston at a first location causes the optical element to bulge at a second location away from the first location to create the bulging state of the optical element; and
a self-anchoring haptics system extending in a plane perpendicular to a visual axis of the accommodating intraocular lens, the self-anchoring haptics system adapted to engage with ocular tissue to form at least two spaced-apart, stationary anchor points for retaining the accommodating intraocular lens in the eye.
2. The AIOL system according to claim 1 , wherein the self-anchoring haptics system is integrally formed with the accommodating intraocular lens.
3. The AIOL system according to claim 1 , wherein the housing has a diameter of at least 6 mm to about 7 mm.
4. The AIOL system according to claim 1 , wherein the housing is formed of a silicone or acrylic based polymer material.
5. The AIOL system according to claim 1 , wherein the self-anchoring haptics system includes a pair of C-shaped haptics extending from the accommodating intraocular lens in opposite directions.
6. The AIOL system according to claim 1 , wherein the self-anchoring haptics system includes spaced apart pointed puncturing members.
7. The AIOL system according to claim 1 , wherein the optical element has a continuous, slightly curvilinear leading surface in the non-bulging state.
8. The AIOL system according to claim 1 , wherein the accommodating intraocular lens has a continuously variable Diopter strength from a minimum Diopter strength suitable for distance vision and a maximum Diopter strength suitable for near vision.
9. The AIOL system according to claim 1 , wherein the optical element is suitable for distance vision in the non-bulging state and near vision in the bulging state.
10. The AIOL system according to claim 1 , wherein the optical element is formed of a silicone-based material.