Intraocular lens designs for improved stability
Intraocular lenses (IOLs) that improve lens stability by, for example, increasing anterior-posterior stiffness of the IOL, increasing anterior-posterior dimensions of the IOL and/or increasing contact area with the equator of the bag to resist movement of the IOL as the bag collapses over time. These IOLs may be non-modular (single component) or modular (multiple component). In modular embodiments, the IOL system may include intraocular base and optic components, which, when combined, form a modular IOL.
1. A device configured for insertion into an eye, the device comprising:
a base comprising:
an anterior housing portion comprising:
an anterior wall,
an anterior opening at an anterior end of the anterior wall,
an anterior chamber posterior to the anterior opening, wherein a width of the anterior chamber is greater than a width of the anterior opening,
a posterior housing portion, and
an intermediate housing portion extending between the anterior and the posterior housing portions, wherein the intermediate housing portion is wider than the anterior and the posterior housing portions and protrudes from the anterior and the posterior housing portions, and wherein the intermediate housing portion has a recess therein posterior to the anterior chamber, wherein the recess is a void of an inner surface of the intermediate housing portion,
wherein the recess is spaced apart from the anterior opening by the anterior chamber and extends continuously around a circumference of the base, the void comprising an anterior ledge, a posterior ledge, and a sidewall extending in an anterior-posterior direction.
2. The device of claim 1 , wherein the posterior housing portion comprises:
a posterior wall;
a posterior opening at a posterior end of the posterior wall; and
a posterior chamber anterior to the posterior opening, wherein a width of the posterior chamber is greater than a width of the posterior opening, and wherein the recess is spaced apart from the posterior opening by the posterior chamber.
3. The device of claim 1 , wherein each of the anterior housing, the posterior housing, and the intermediate housing portions is annular.
4. The device of claim 1 , wherein the recess is annular.
5. The device of claim 1 , wherein the recess is wider than the anterior chamber.
6. The device of claim 1 , further including a lens configured for receipt in the recess.
7. The device of claim 6 , wherein an anterior surface of the lens is spaced apart from the anterior opening by the anterior chamber when the lens is received in the recess.
8. A device configured for insertion into an eye, the device comprising:
a base comprising:
a first housing portion comprising:
a first wall,
a first opening at a first end of the first wall,
a first chamber adjacent to the first opening, wherein a width of the first chamber is greater than a width of the first opening,
a second housing portion, and
an intermediate housing portion extending between the first and the second housing portions, wherein the intermediate housing portion is wider than the first and the second housing portions and protrudes from the first and the second housing portions, and wherein the intermediate housing portion has a recess therein adjacent to the first chamber, wherein the recess is a void of an inner surface of the intermediate housing portion,
wherein the recess is spaced apart from the first opening by the first chamber and extends continuously around a circumference of the base, the void comprising an anterior ledge, a posterior ledge, and a sidewall extending in an anterior-posterior direction.
9. The device of claim 8 , wherein a radial thickness of the first wall is less than an axial height of the base.
10. The device of claim 8 , wherein a radial thickness of the first wall is less than an axial height of the first wall.
11. The device of claim 8 , wherein a radial wall thickness of the intermediate housing portion is less than an axial height of the base.
12. The device of claim 8 , wherein the second housing portion comprises:
a second wall;
a second opening at a second end of the second wall; and
a second chamber adjacent to the second opening, wherein a width of the second chamber is greater than a width of the second opening, and wherein the recess is spaced apart from the second opening by the second chamber.
13. The device of claim 8 , wherein a width of the first wall increases as the first wall approaches the intermediate housing portion.
14. The device of claim 8 , further including a lens configured for receipt in the recess.
15. A device configured for insertion into an eye, the device comprising:
a base comprising:
an anterior housing portion comprising an anterior opening;
a posterior housing portion comprising a posterior opening;
an intermediate housing portion between the anterior and the posterior housing portions, the intermediate housing portion comprising a recess, wherein the recess is a void of an inner surface of the intermediate housing portion, the void comprising an anterior ledge, a posterior ledge, and a sidewall extending in an anterior-posterior direction, and wherein the recess extends continuously around a circumference of the base; and
a passage extending through the anterior housing, the posterior housing, and the intermediate housing portions, wherein the passage extends from the anterior opening to the posterior opening, wherein a radial width of the passage increases as the passage extends from the anterior opening through the anterior housing portion and to the intermediate housing portion, wherein the radial width further increases as the passage extends into the intermediate housing portion, and wherein the radial width decreases as the passage extends from the intermediate housing portion toward the posterior opening through the posterior housing portion.
16. The device of claim 15 , further including a lens configured for receipt in the intermediate housing portion in the portion of the passage having the further increased radial width.
17. The device of claim 16 , wherein the lens comprises:
a central optic; and
at least one extension protruding radially outwardly from the central optic, wherein the extension is configured to engage one or more surfaces of the intermediate housing portion that define the portion of the passage having the further increased radial width.
18. The device of claim 17 , wherein the at least one extension includes a plurality of extensions.
19. The device of claim 18 , wherein the plurality of extensions includes a pair of extensions protruding from diametrically opposite locations of the central optic.
20. The device of claim 16 , wherein, when the lens is received in the intermediate housing portion, the device comprises:
an anterior chamber on an anterior side of the lens, radially surrounded by an anterior wall of the anterior housing portion, wherein the anterior chamber is wider than the anterior opening, and
a posterior chamber on a posterior side of the lens, radially surrounded by a posterior wall of the posterior housing portion, wherein the posterior chamber is wider than the posterior opening.