Intraocular lenses having open-loop haptic structures
An ophthalmic device includes an optic including an optic axis and an open-loop haptic structure coupled with the optic. The open-loop haptic structure includes a pair of open loops, the pair of open loops comprising a first open loop and a second open loop. At least a portion of the first open loop extends in a first angular direction. At least a portion of the second open loop extends in a second angular direction, the second angular direction being opposite the first angular direction.
1. An ophthalmic device comprising:
an optic including an optic axis; and
an open-loop haptic structure coupled with the optic, the open-loop haptic structure including a pair of open loops, the pair of open loops comprising a first open loop and a second open loop, wherein:
at least a portion of the first open loop extends in a first angular direction;
at least a portion of the second open loop extends in a second angular direction, the second angular direction being opposite the first angular direction;
the first open loop and the second open loop are configured to be compressed by a capsular bag; and
the second open loop is configured such that an end of the second open loop abuts against a portion of the first open loop between the optic and a free end of the first open loop to prevent further compression of the first open loop when the first open loop and the second open loop are compressed by a capsular bag.
2. The ophthalmic device of claim 1 , wherein the first open loop is longer than the second open loop.
3. The ophthalmic device of claim 1 , wherein the at least a portion of the first open loop that extends in the first angular direction extends toward the second open loop.
4. The ophthalmic device of claim 1 , wherein the open loop haptic structure is coupled to the optic via a frame surrounding the optic.
5. The ophthalmic device of claim 4 , wherein the frame comprises a cross-sectional thickness greater than that of an edge of the optic.
6. The ophthalmic device of claim 4 , wherein the frame comprises a cross-sectional thickness the same as that of an edge of the optic.
7. The ophthalmic device of claim 1 , wherein the second open loop is further configured to prevent the first open loop from collapsing when compressed radially.
8. The ophthalmic device of claim 1 , wherein the open-loop haptic structure further comprises a second pair of open loops, the second pair of open loops comprising a third open loop and a fourth open loop, and wherein the fourth open loop is configured to abut a portion of the third open loop between the optic and a free end of the third open loop when the third open loop and the fourth open loop are compressed by the capsular bag.
9. The ophthalmic device of claim 8 , wherein the third open loop is longer than the fourth open loop.
10. The ophthalmic device of claim 8 , wherein:
at least a portion of the third open loop extends in the first angular direction; and
at least a portion of the fourth open loop extends in the second angular direction.
11. The ophthalmic device of claim 10 , wherein the at least a portion of the third open loop that extends in the first angular direction extends toward the fourth open loop.
12. The ophthalmic device of claim 1 , wherein at least one of the first open loop and the second open loop comprises at least one edge configured to reduce migration of cells.
13. The ophthalmic device of claim 1 , wherein the first angular direction corresponds to a counter-clockwise direction, and the second angular direction corresponds to a clockwise direction.
14. An ophthalmic device, comprising:
an optic; and
an open-loop haptic structure coupled to the optic, the open-loop haptic structure comprising:
a first open loop, and
a second open loop,
wherein the first open loop and the second open loop are configured to be compressed by a capsular bag, and at least a portion of the second open loop is configured such that an end of the second open loop abuts against a portion of the first open loop between the optic and a free end of the first open loop to prevent further compression of the first open loop when the first open loop and the second open loop are compressed by a capsular bag.
15. The ophthalmic device of claim 14 , wherein the second open loop is configured to reduce a radial distance of movement of the first open loop when the first open loop is compressed radially.
16. An ophthalmic device, comprising:
an open-loop haptic structure configured to be affixed to an optic, the open-loop haptic structure comprising:
a first open loop, and
a second open loop,
wherein the first open loop and the second open loop are configured to be compressed by a capsular bag, and at least a portion of the second open loop is configured such that an end of the second open loop abuts against a portion of the first open loop between the optic and a free end of the first open loop to prevent further compression of the first open loop when at least the first open loop is compressed by a capsular bag.