Haptic devices for intraocular lens
A haptic for fixation to, and manufacture in conjunction with, an intraocular lens to be implanted in the natural lens capsule of the human eye is disclosed. The haptic secures the lens in an appropriate position within the natural capsule so as to provide optimal visual acuity through the aphakic lens. The haptic is designed to position the lens neutrally, anteriorly or posteriorly within the lens envelope. The haptic has an anterior retention ring and a posterior retention ring.
1. An intraocular lens, comprising:
an optic;
a plurality of haptic arms extending from the optic;
an annular ring coupled to the plurality of arms, wherein the annular ring is comprised of an anterior retention ring and a posterior retention ring, wherein the plurality of haptic arms define openings between the annular ring and the optic; and
one pair of orientation tabs positioned off center within one of the openings, a first orientation tab of the pair of orientation tabs extending radially away from the optic and into the annular ring, and a second orientation tab of the pair of orientation tabs extending away from the optic along the same radius as the first orientation tab and into a surface of the one opening, the pair of orientation tabs indicating an alignment of the intraocular lens when placed in an eye.
2. The intraocular lens of claim 1 , wherein the anterior retention ring and the posterior retention ring are separated by a plurality of haptic pillars.
3. The intraocular lens of claim 2 , wherein each haptic pillar is coupled to one of the plurality of haptic arms.
4. The intraocular lens of claim 2 , further comprising gaps between the haptic pillars.
5. The intraocular lens of claim 1 , which is comprised of a hydrophilic acrylic, hydrophobic acrylic, silicone, or combinations thereof.
6. The intraocular lens of claim 1 , which is comprised of a material for insertion into the eye.
7. The intraocular lens of claim 1 , further comprising a haptic ribbon coupling the optic to the haptic arms.
8. The intraocular lens of claim 7 , wherein the haptic ribbon has one or more rounded corners.
9. The intraocular lens of claim 1 , wherein each haptic arm extends from a circumference of the optic to an inner surface of the annular ring.
10. The intraocular lens of claim 1 , wherein the optic and the annular ring are coaxial.
11. The intraocular lens of claim 1 , wherein the openings have a smaller radial width than circumferential length.
12. The intraocular lens of claim 1 , wherein the anterior retention ring and the posterior retention ring are connected at an apex of a “U” shaped recess in an outer circumferential surface of the annular ring.
13. The intraocular lens of claim 12 , wherein the posterior haptic ring is coupled posteriorly to the anterior retention ring.
14. The intraocular lens of claim 1 , wherein the annular ring has a kidney shaped cross section.
15. The intraocular lens of claim 1 , which is adapted to be compressed by an instrument to allow insertion into the eye.
16. The intraocular lens of claim 1 , wherein the annular ring, when inserted into the eye, is adapted to move in response to movement of a ciliary process.
17. The intraocular lens of claim 16 , wherein movement of the annular ring provides focal accommodation.
18. The intraocular lens of claim 1 , wherein the pair of orientation tabs is positioned between two of the plurality of haptic arms.