Modular intraocular lens designs, tools and methods
Modular IOL systems including a base and a lens, wherein the lens includes tabs for connection to the base. The modular IOL allows for the lens to be adjusted or exchanged while leaving the base in place, either intra-operatively or post-operatively.
1. A modular intra-ocular lens (IOL) system, comprising:
a base, including:
a first central opening,
a first peripheral portion extending about the first central opening, and
a recess formed in the first peripheral portion;
a lens including a central optical body, wherein the lens is positioned in the first central opening, and engages the recess; and
a cover, including:
a second central opening,
a second peripheral portion extending about the second central opening, and
an engagement assembly for coupling the cover to the base, wherein the engagement assembly engages the recess, and the second peripheral portion overlaps the central optical body.
2. The modular IOL of claim 1 , wherein the second peripheral portion extends anterior to the central optical body.
3. The modular IOL of claim 1 , wherein the central optical body includes an anterior-facing surface, the second peripheral portion includes a posterior-facing surface, and the posterior-facing surface contacts the anterior-facing surface.
4. The modular IOL of claim 1 , wherein the second peripheral portion includes a posterior-facing surface, and the cover further includes a wall extending posteriorly from the posterior-facing surface.
5. The modular IOL of claim 4 , wherein the wall includes a posterior end, and the engagement assembly extends radially-outwardly from the posterior end.
6. The modular IOL of claim 1 , wherein the wall extends around a cavity of the cover that receives an anterior portion of the central optical body of the lens.
7. The modular IOL of claim 1 , wherein the engagement assembly includes a first pair of tabs extending radially-outwardly from opposite sides of the cover to engage a first pair of portions of the recess, the lens includes a second pair of tabs extending radially-outwardly from opposite sides of the central optical body to engage a second pair of portions of the recess, and each portion of the first pair of portions lies in between the second pair of portions.
8. The modular IOL of claim 1 , wherein the engagement assembly includes a fixed tab and an actuatable tab.
9. The modular IOL of claim 8 , wherein the fixed tab and the actuatable tab are at opposite sides of the cover.
10. The modular IOL of claim 8 , wherein the actuatable tab includes a pair of spring members.