System to reduce surface contact between optic and haptic areas
View Patent ↗Embodiments of the present invention provide an intraocular lens with an optic zone having a first surface topology and a haptic zone having a second surface topology. The surface roughness of the haptic zone may be greater than the surface roughness of the optic zone. The surface topology of the optic zone may have a first surface geometry and the surface topology of the haptic zone may have a second surface geometry. The first and second surface geometries may retain lubrication fluid in a space formed therein. The haptics formed by the manufacturing process may have a reduced ability to adhere to the optic zone, such as when the lens is folded or advanced through a cannula.
1. An intraocular lens comprising:
an optic zone, configured to replace a natural lens or to correct a malady in the natural lens of an eye, having a first surface topology; and
a haptic, configured to hold the intraocular lens in the eye, having a second surface topology, wherein the second surface topology reduces the ability for the haptic to adhere to the optic zone,
wherein the second surface topology comprises one or more continuous features, wherein the one or more continuous features comprise:
a first plurality of rings, wherein the first plurality of rings are regularly spaced, concentric, raised circular rings each having a same first height;
a second plurality of rings, wherein the second plurality of rings are concentric, raised circular rings each having a same second height;
wherein the first height is greater than the second height and wherein the first plurality of rings is concentric with the second plurality of rings; and
wherein the first plurality of rings and the second plurality of rings comprise a repeating pattern, along the surface of the hapic, comprising:
a ring of the first plurality of rings;
two rings of the second plurality of rings;
a ring of the first plurality of rings;
two rings of the second plurality of rings.
2. The intraocular lens of claim 1 , wherein the first surface topology comprises a first surface roughness and the second surface topology comprises a second surface roughness greater than the first surface roughness.
3. The intraocular lens of claim 2 , wherein the second surface roughness is at least two times greater than the first surface roughness.
4. The intraocular lens of claim 1 , wherein the first surface geometry and the second surface geometry form a space between the haptic and the optic zone during insertion of the intraocular lens, wherein the space formed by the haptic and the optic zone retains lubrication fluid.
5. The intraocular lens of claim 1 , wherein the haptic is configured to hold the intraocular lens in a desired position and orientation.
6. The intraocular lens of claim 1 , wherein the haptic is configured to be folded inside the optic zone as the intraocular lens is compressed for insertion into the eye and wherein the second surface topology of the haptic forms a space between the haptic and the optic zone during insertion of the lens into the eye.
7. The intraocular lens of claim 6 , wherein the optic zone is configured to unfold in the eye.
8. The intraocular lens of claim 1 , wherein the first plurality of rings have rounded tops.