Modular IOL design

1. A modular intraocular lens (IOL), comprising:

an optic comprising an anterior surface and a posterior surface; and

an annular ring comprising:

an anterior rim with an anterior opening; and

a posterior rim with a flange, wherein:

the anterior rim and the posterior rim form an inwardly facing recess;

a flange anterior surface defines a first profile; and

a flange posterior surface defines a second profile, wherein the second profile is non-parallel with the first profile, and wherein the flange posterior surface comprises a convex curvature having a posteriorly-extending protrusion.

2. The modular IOL of claim 1 , wherein:

the first profile is associated with a first radius of curvature; and the second profile is associated with a second radius of curvature.

3. The modular IOL of claim 1 , wherein:

the flange defines a posterior rim opening with an inner diameter less than a diameter of the anterior rim opening.

4. The modular IOL of claim 3 , wherein:

the optic is shaped to focus light transmitted parallel to an optical axis at a first focal length; and

the flange is configured to defocus light transmitted through the optic at an incident angle off-axis from the optical axis.

5. The modular IOL of claim 4 , wherein:

the incident angle is greater than 25 degrees off-axis.

6. The modular IOL of claim 1 , wherein:

the flange anterior surface is shaped to support the optic.

7. An intraocular lens assembly, comprising:

an optic defined by an optic anterior surface having a first curvature and an optic posterior surface having a second curvature;

a ring for positioning the optic in an intracapsular bag, the ring comprising:

an anterior rim defining an anterior rim opening with an inner diameter sized to allow insertion of the optic into the ring;

an inwardly facing recess for retaining the optic in the ring;

a posterior rim defining a posterior rim opening; and

a flange formed on the posterior rim, comprising a flange inner diameter less than a diameter of the optic, wherein:

a flange anterior surface defines a first profile; and

a flange posterior surface defines a second profile, wherein the second profile is non-parallel with the first profile, and wherein the flange posterior surface comprises a convex curvature having a posteriorly-extending protrusion.

8. The IOL assembly of claim 7 , wherein:

the first profile is associated with a first radius of curvature; and the second profile is associated with a second radius of curvature.

9. The IOL assembly of claim 7 , wherein:

an outer diameter of the flange is greater than an inner diameter of the anterior rim and less than a diameter of the inwardly facing recess.

10. A method of manufacturing a ring for an intraocular lens (IOL), the method comprising:

forming an anterior rim with an anterior rim opening, the anterior rim opening having a diameter less than a diameter of an optic;

forming a posterior rim defining a posterior rim opening; and

forming a flange relative to the posterior rim, comprising:

forming a flange anterior surface with a first profile; and

forming a flange posterior surface with a second profile non-parallel with the first profile, wherein the flange posterior surface comprises a convex curvature having a posteriorly-extending protrusion.

11. The method of claim 10 , wherein:

one or more of the cross-section profile of the flange anterior surface, the cross-section profile of the flange posterior surface and the axial distance between the flange anterior surface and the flange posterior surface are formed to defocus off-axis energy passing through the ring.

12. The method of claim 10 , further comprising:

forming an inwardly facing recess on an interior surface of the ring for retaining an optic in the ring.