Intraocular lenses having closed-loop ring haptic structures
An ophthalmic device includes an optic including an optic axis and a periphery and a closed-loop ring haptic structure coupled with the optic. The closed loop haptic structure includes a first ring structure having a first characteristic length, a second ring structure having a second characteristic length, and a plurality of connectors coupling the first ring structure and the second ring structure. The first ring structure is positioned adjacent to the periphery of the optic and is coupled to the entire periphery of the optic, and the first characteristic length is less than the second characteristic length.
1 . An ophthalmic device comprising:
an optic including an optic axis; and
a closed-loop ring haptic structure coupled with the optic and including a first ring having a first characteristic length, a second ring having a second characteristic length, and a plurality of connectors coupling the first ring and the second ring, wherein:
the optic and the first ring are located in a first plane that is substantially perpendicular to the optical axis;
the second ring is located in a second plane that is substantially perpendicular to the optical axis and spaced apart from the first plane;
an outer perimeter of the second ring is entirely disposed radially outward of the plurality of connectors;
each of the plurality of connectors is entirely disposed between the first plane and the second plane; and
the plurality of connectors each comprise:
a first component extending from the first ring in a radial direction;
a second component extending away from the first component in an axial direction;
a radially inward surface having a concave curvature extending between the first component and the second component; and
a radially outward surface having a convex curvature extending between the first component and the second component.
2 . The ophthalmic device of claim 1 , wherein the first plane is posterior to the second plane.
3 . The ophthalmic device of claim 1 , wherein the first plane is anterior to the second plane.
4 . The ophthalmic device of claim 1 , wherein the first plane and the second plane are spaced apart along the optical axis between one millimeter and five millimeters.
5 . The ophthalmic device of claim 1 , wherein the first characteristic length of the first ring is less than the second characteristic length of the second ring.
6 . The ophthalmic device of claim 1 , wherein the first ring is positioned adjacent to a periphery of the optic and is coupled to an entire periphery of the optic.
7 . The ophthalmic device of claim 1 , wherein each of the plurality of connectors extends in a substantially radial direction.
8 . The ophthalmic device of claim 1 , wherein at least one of the plurality of connectors has a bend between the first ring and the second ring, wherein the bend is configured to flex in response to compression of the ophthalmic device.
9 . The ophthalmic device of claim 1 , wherein each of the plurality of connectors extend between an outer surface of the first ring and an inner surface of the second ring.
10 . The ophthalmic device of claim 1 , wherein the concave curvature and the convex curvature are formed along a plane substantially parallel to the optic axis.