Narrow profile intraocular lens
View Patent ↗A narrow profile, glare reducing, posterior chamber intraocular lens comprises an optic having an anterior surface and a posterior surface and an optical axis. The posterior surface is formed having two adjacent peri-axial, stepped imaging zones, the two imaging zones having the substantially the same optical power. A transition zone between the two imaging zones preferably has a surface of continuous curvature shaped to reduce direct glare from light incident on the transition zone in an individual's eye in which the intraocular lens is implanted by internal reflection of direct light incident on the transition zone. Attachment members joined to the optic position the intraocular lens in an eye with the optical axis of the optic generally aligned with the optical axis of the eye. In variations, the transition zones are formed at the optic edge to minimize direct and indirect in the eye of an individual wearing the intraocular lens.
1. A narrow profile, glare reducing, intraocular lens comprising:
a. an anterior chamber optic having a convex anterior surface and a concave posterior surface, said optic having a peripheral edge and an optical axis;
b. a transition direct glare minimizing zone between said posterior surface and said optic peripheral edge, said transition zone having a transition surface extending outwardly and posteriorly from the posterior surface, said transition surface being of continuous curvature without any abrupt change in transition surface curvature, the transition surface minimizing light transmission through the transition zone by causing internal reflection of light impinging on the optic from a centrally located source of light within a substantial width of said transition zone, the transition zone being in part thicker than the optic at the optical axis; and
c. positioning means joined to said optic for positioning the optic in an eye with said optical axis of the optic generally aligned with an optical axis of the eye.
2. The narrow profile, glare reducing, intraocular lens as claimed in claim 1 , wherein said posterior surface is formed having an imaging zone centered at the optical axis of the optic.
3. The narrow profile glare reducing, intraocular lens as claimed in claim 1 wherein a maximum optic thickness is less than about 0.5 mm.
4. The narrow profile glare reducing intraocular lens as claimed in claim 1 , wherein the optic has a thickness enabling insertion into the anterior chamber of an eye.