Intraocular lens for inhibiting cell growth and reducing glare
An intraocular lens implantable in an eye includes an optic for placement in the capsular bag of the eye and for directing light toward the retina of the eye. The optic has a central optical axis, an anterior face, an opposing posterior face and a peripheral edge between the faces. The peripheral edge has one or more curved or angled surfaces that reduce glare within the IOL. For instance, a rounded transition surface on the anterior side of the peripheral edge diffuses the intensity of reflected light, or a particular arrangement of straight edge surfaces refracts the light so as not to reflect, or does not reflect at all. The intersection of the peripheral edge and at least one of the anterior face and the posterior face, preferably both of such faces, forms a peripheral corner located at a discontinuity between the peripheral edge and the intersecting face or faces. The present IOLs inhibit cell growth from the eye in front of or in back of the optic and reduce glare obtained in the eye in which the IOL is located.
1. An intraocular lens that inhibits cell growth thereon and reduces glare from incoming light rays, comprising:
a centered optic sized and adapted for placement in the capsular bag of an eye and shaped to direct light toward the retina of the eye, the optic having a central optical axis, an anterior face and an opposed posterior face, and a peripheral edge between the anterior and posterior faces and circumscribing the optic, the peripheral edge comprising:
a linear edge surface;
a non-discontinuous convex portion smoothly blending the anterior face with the linear edge surface and having a curvature substantially greater than the curvature of the anterior face on the peripheral edge for reducing glare from incoming light rays; and
a peripheral corner edge located at a discontinuity between the linear edge surface and the posterior face for inhibiting cell growth onto the optic.
2. The intraocular lens of claim 1 , wherein the anterior face has a substantially constantly curved corrective portion centered on the optical axis and the optic further includes an anterior peripheral region between the corrective portion and the non-discontinuous convex portion of the peripheral edge.
3. The intraocular lens of claim 2 , wherein the anterior peripheral region is substantially planar and perpendicular to the central optical axis.
4. The intraocular lens of claim 2 , wherein the anterior peripheral region is at least partially opaque to the transmission of light to help reduce glare from incoming light rays.
5. The intraocular lens of claim 1 , wherein the discontinuity between the peripheral edge and posterior face is formed where the peripheral edge and the posterior face intersect at an angle in a range of about 45° to about 135°.
6. The intraocular lens of claim 5 , wherein the peripheral edge and the posterior face intersect at an angle in a range of about 60° to about 120°.