Accommodating intraocular lens
Disclosed is an accommodating intraocular lens device for treatment of an eye including a stabilization haptic ( 120 ) configured to be positioned within a region of an eye and a lens body having a sealed chamber containing a fixed volume of optical fluid. The lens body includes a shape changing membrane ( 145 ) configured to outwardly bow in a region surrounding the optical axis of the eye; a shape deformation membrane configured to undergo displacement relative to the first shape changing membrane; and a static element ( 150 ). An inner surface of the shape changing membrane, an inner surface of the shape deformation membrane and an inner surface of the static element collectively form the sealed chamber. The lens device also includes a force translation arm ( 115 ) having a first end configured to contact an outer surface of the shape deformation membrane of the lens body and a second end configured to engage a ciliary structure of the eye. The force translation arm is configured to move relative to the lens body upon movement of the ciliary structure.
1. An accommodating intraocular lens device for treatment of an eye, the device comprising:
an optical, lens body having a sealed chamber containing a fixed volume of optical fluid, the lens body comprising:
an anterior lens element comprising a perimeter region and a central surface surrounded by the perimeter region, the central surface configured to outwardly bow;
an annular support coupled to the perimeter region of the anterior lens element, the annular support having a shape deformation membrane extending along an arc of the annular support, the shape deformation membrane configured to undergo displacement relative to the perimeter region of the anterior lens element;
a static, posterior lens element positioned opposite the anterior lens element;
an immovable, internal support encircling the central surface of the anterior lens element, wherein the immovable, internal support has an anterior-facing surface coupled to the perimeter region of the anterior lens element and has an anterior-to-posterior thickness; and
the fixed volume of optical fluid,
wherein an inner surface of the anterior lens element, an inner surface of the shape deformation membrane and an inner surface of the static, posterior lens element collectively form the sealed chamber of the lens body containing the fixed volume of optical fluid;
a force translation arm having a first end configured to contact an outer surface of the shape deformation membrane of the lens body and a free end available and configured to engage a ciliary structure of the eye outside the capsular bag when the lens device is implanted in the eye such that an optical axis of the lens body is substantially aligned with a visual axis of the eye,
wherein the force translation arm is movable relative to the lens body and the immovable, internal support to cause inward movement of the shape deformation membrane; and
a stabilization haptic coupled to the lens body.
2. The device of claim 1 , wherein the anterior-to-posterior thickness of the immovable, internal support tapers towards the shape deformation membrane such that the anterior-to-posterior thickness at an outer edge of the immovable, internal support is less than the anterior-to-posterior thickness away from the outer edge.
3. The device of claim 1 , wherein inward movement of the force translation arm causes the inward movement of the shape deformation membrane causing a deformation of the sealed chamber.
4. The device of claim 1 , wherein inward movement of the shape deformation membrane causes the optical fluid in the sealed chamber to press against the inner surface of the anterior lens element.
5. The device of claim 1 , wherein the immovable, internal support mechanically isolates optical components of the lens body from distortion during movement of the force translation arm relative to the lens body.
6. The device of claim 1 , wherein the immovable, internal support comprises a plurality of immovable, internal supports spaced apart from one another within the sealed chamber.
7. The device of claim 2 , wherein the anterior-to-posterior thickness at the outer edge prevents contact between the immovable, internal support and the shape deformation membrane during inward movement of the shape deformation membrane.
8. The device of claim 1 , wherein the stabilization haptic is bonded to the lens body.
9. The device of claim 1 , wherein the stabilization haptic is molded as part of the lens body.
10. The device of claim 1 , wherein the immovable, internal support forms a partition within the sealed chamber dividing the sealed chamber into a deformable region and a central region.
11. The device of claim 10 , wherein the deformable region is located inside an optic zone of the lens body.
12. The device of claim 10 , wherein inward movement of the shape deformation membrane deforms the deformable region.
13. The device of claim 1 , wherein inward movement of the shape deformation membrane compresses the sealed chamber.
14. The device of claim 1 , wherein the optical fluid in the sealed chamber is non-compressible and presses against the inner surface of the anterior lens element upon inward movement of the shape deformation member outward bowing of the anterior lens element.
15. The device of claim 1 , wherein the immovable, internal support is further coupled to a region of the static, posterior lens element.
16. The device of claim 10 , wherein the immovable, internal support comprises a channel extending through the internal support providing fluid communication between the deformable region and the central region of the sealed chamber.