Modular IOL design
A modular intraocular lens (IOL) with a ring configured to prevent glare artifacts. The ring includes a flange on the posterior rim, in which an anterior surface on the flange has a first profile and a posterior surface of the flange has a second profile non-parallel with the first profile. Non-parallel surfaces of the flange can be configured to defocus light transmitted at off-axis angles through an optic and the flange.
1 . A modular intraocular lens (IOL) base, comprising:
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 configured to receive an optic;
a flange anterior surface defines a first profile; and
a flange posterior surface defines a second profile, wherein the flange posterior surface comprises a convex posteriorly-extending protrusion extending from the flange posterior surface,
wherein the inwardly facing recess is configured to position the optic above the convex posteriorly-extending protrusion in a direction parallel to an optical axis of the optic.
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 the 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:
a ring for positioning an 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 flange posterior surface comprises a convex posteriorly-extending protrusion extending from the flange posterior surface,
wherein the inwardly facing recess is configured to position the optic above the convex posteriorly-extending protrusion in a direction parallel to an optical axis of the optic.
8 . The IOL assembly of claim 7 , wherein one or more of the flange anterior surface and the flange posterior surface comprises a curvature.
9 . The IOL assembly of claim 8 , wherein:
the first profile is associated with a first radius of curvature; and the second profile is associated with a second radius of curvature.
10 . The IOL assembly of claim 9 , wherein the flange posterior surface comprises a convex curvature.
11 . The IOL assembly of claim 7 , wherein:
an outer diameter of the flange is greater than the inner diameter of the anterior rim and less than a diameter of the inwardly facing recess.
12 . A method of manufacturing a ring for an interocular 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, the anterior rim and the posterior rim defining an inwardly facing recess configured to receive the optic; 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, wherein the flange posterior surface comprises a convex posteriorly-extending protrusion extending from the flange posterior surface,
wherein the inwardly facing recess is configured to position the optic above the convex posteriorly-extending protrusion in a direction parallel to an optical axis of the optic.
13 . The method of claim 12 , wherein forming the flange comprises forming one or more of the flange anterior surface and the flange posterior surface with a curvature.
14 . The method of claim 13 , wherein forming the flange posterior surface comprises forming a convex curvature.
15 . The method of claim 12 , wherein:
one or more of a cross-section profile of the flange anterior surface, a cross-section profile of the flange posterior surface and an axial distance between the flange anterior surface and the flange posterior surface are formed to defocus off-axis energy passing through the ring.
16 . The method of claim 12 , further comprising:
forming the inwardly facing recess on an interior surface of the ring for retaining the optic in the ring.