Accommodating intraocular lens
View Patent ↗Systems, devices, and methods are presented for a prosthetic injectable intraocular lens. One or more silicone elastomeric patches located outside the optical path on the anterior side but away from the equator can be accessed by surgical needles in order to fill or adjust optically clear fluid within the lens. The fluid can be adjusted in order to set a base dioptric power of the lens and otherwise adjust a lens after its initial insertion. The elastomeric patches are sized so that they self-seal after a needle is withdrawn. A straight or stepped slit in the patch can allow a blunt needle to more easily access the interior of the lens.
1. An accommodating intraocular lens apparatus, comprising:
a biocompatible polymer balloon of a first elastomeric material, the balloon fillable with an optically clear medium, the balloon configured for insertion into a capsular bag of an eye; and
a valve including a self-sealing elastomeric patch of a different, second, cured elastomeric material that is stiffer than the first material, the elastomeric patch intimately formed with the balloon and being stiffer than the balloon,
wherein the balloon has a thickness less than 100 μm,
wherein the elastomeric patch has a thickness equal to or between 100 μm and 700 μm, thereby being thin enough to avoid contact with a posterior iris when implanted in an eye and sufficiently thick enough for self-sealing of needle punctures at nominal lens pressures for filling or adjusting said optically clear medium within the balloon,
wherein the elastomeric patch includes a pre-formed slit.
2. The apparatus of claim 1 wherein the elastomeric patch has a thickness between 160 μm and 350 μm.
3. The apparatus of claim 1 wherein the elastomeric patch has a thickness between 150 μm and 250 μm.
4. The apparatus of claim 1 wherein the elastomeric patch is colored differently from the balloon, thereby allowing a surgeon to locate the patch.
5. The apparatus of claim 1 wherein the pre-formed slit is adapted for a blunt needle to pass therethrough.
6. The apparatus of claim 5 wherein the pre-formed slit includes a stepped portion.
7. The apparatus of claim 1 wherein the elastomeric patch has a concave innermost edge, the concave edge of the patch located outside an optical path of the lens apparatus.
8. The apparatus of claim 1 further including:
a circumferential sharp edge on an anterior side of the balloon configured to prevent migration of cells across the edge.
9. The apparatus of claim 1 further including:
a circumferential sharp edge on a posterior side of the balloon configured to prevent migration of cells across the edge.
10. The apparatus of claim 1 wherein the balloon comprises a composite of silicone and fluorosilicone.
11. The apparatus of claim 1 wherein the balloon comprises a composite of silicone and parylene.
12. The apparatus of claim 1 wherein the balloon is comprised of parylene and the patch is comprised of a silicone elastomer.
13. The apparatus of claim 1 further comprising an optically clear medium, the optically clear medium attenuating blue or shorter-wavelength electromagnetic radiation.
14. The apparatus of claim 1 wherein the balloon is substantially empty and in a rolled configuration.
15. The apparatus of claim 1 wherein the balloon has a thickness of 30 μm to 40 μm.
16. The apparatus of claim 1 wherein the first and second elastomeric materials comprise silicones.
17. The apparatus of claim 16 wherein the first and second elastomeric materials comprise differently cured silicones.