HYBRID OPTICAL EDGE FOR AN INTRAOCULAR LENS (IOL)
An intraocular lens includes an optic having an anterior optic surface, a posterior optic surface, and an optic edge extending between the anterior optic surface and a posterior optic surface. The optic edge includes a convex portion extending from a periphery of the anterior optic surface and a flat portion extending from a periphery of the posterior optic surface such that a corner edge is formed between the optic edge and the posterior optic surface. The flat portion intersecting the convex portion to form the optic edge. Such an optic edge may eliminate glare or other undesired effects that adversely impact quality of vision.
1 . An intraocular lens comprising:
an optic comprising an anterior optic surface, a posterior optic surface, and an optic edge extending between the anterior optic surface and a posterior optic surface, the optic edge comprising:
a convex portion extending from a periphery of the anterior optic surface; and
a flat portion extending from a periphery of the posterior optic surface such that a corner edge is formed between the optic edge and the posterior optic surface, the flat portion intersecting the convex portion to form the optic edge.
2 . The intraocular lens of claim 1 , wherein a first radius of the curvature of the convex portion is greater than a second radius of the corner edge.
3 . The intraocular lens of claim 2 , wherein the first radius is less than a third radius of the anterior optic surface at a central portion of the intraocular lens.
4 . The intraocular lens of claim 3 , wherein the first radius is less than a fourth radius of the posterior optic surface at a central portion of the intraocular lens, and wherein the third radius is greater than the fourth radius.
5 . The intraocular lens of claim 2 , wherein the second radius is zero.
6 . The intraocular lens of claim 1 , wherein the convex portion has a radius between 0.4 mm and 0.6 mm.
7 . The intraocular lens of claim 1 , wherein the corner edge has a discontinuous slope with respect to the flat surface portion and the posterior optic surface.
8 . The intraocular lens of claim 1 , wherein the intraocular lens has a center thickness that is greater than an edge thickness of the optic edge.