| 主权项 |
1. An accommodating intraocular lens (IOL), comprising:
an outer lens enclosure having an anterior structure comprising an anterior surface configured to reside adjacent an interior anterior surface of an evacuated capsular bag and a posterior structure comprising a posterior surface configured to reside adjacent to an interior posterior surface of the evacuated capsular bag, the anterior surface and the posterior surface of the outer lens enclosure extending to and being joined at an equatorial zone of the intraocular lens; a first inner portion within the outer lens, the first inner portion having an anterior zone and a posterior zone, the anterior and posterior zones of the first inner portion being disposed adjacent to the outer lens enclosure; and a second inner portion within the first inner portion, the second inner portion having an anterior zone and a posterior zone, the anterior and posterior zones of the second inner portion being adjacent to the first inner portion; and an innermost member within the second inner portion and disposed between the anterior zone and the posterior zone of the second inner portion; wherein the intraocular lens is deformable by ciliary muscle action when positioned in the evacuated capsular bag such that at least the outer lens enclosure, the first inner portion or the second inner portion are deformed by progressively increasing ocular force, the intraocular lens having an unaccommodated state in which the intraocular lens provides a base optical power and an accommodated state in which the outer lens enclosure and the first inner portion, and the second inner portion each provide an add power, wherein the hardness of each of the outer lens enclosure, first inner portion, second inner portion, and innermost member progressively increase from the outer lens enclosure to the innermost member, wherein the refractive index of each of the outer lens enclosure, first inner portion, second inner portion, and innermost member progressively increase from the outer lens enclosure to the innermost member, wherein the innermost member comprises a material that is less deformable than a material of at least one of the first inner portion, the second inner portions and the outer lens enclosure, wherein the outer lens enclosure, the first inner portion, the second inner portion and the innermost member each provide up to 1 diopter of add power in the fully accommodated state, wherein the outer lens enclosure, the first inner portion, the second inner portion and the innermost member are arranged concentrically within the IOL as gradually reducing spherical surfaces within the internal volume of the IOL. |
