| 摘要 |
An intraocular lens includes a plurality of lenses with a rear lens portion disposed in a posterior capsule from which an eye lens is extracted and a front lens portion disposed at the front side inside the eye in relation to the rear lens portion, and a support portion of the front lens portion among the lenses has flexibility. Accordingly, when the inside of the user's eye moves, the support portion is bent, and hence the front lens portion moves. When the front lens portion moves so that the gap between the front lens portion and the rear lens portion changes, a focal distance of a lens system including the front lens portion and the rear lens portion changes. Accordingly, it is possible to realize an intraocular lens capable of changing a focal distance in a manner such that a user moves the inside of an eye. |
| 主权项 |
1. An intraocular lens comprising:
a rear lens portion which has a lens function and is adapted to be received in a posterior capsule inside an eye from which an eye lens is extracted while at least the posterior capsule is left; and a front lens portion which has a lens function and is adapted to be disposed at the front side inside the eye in relation to the rear lens portion such that the front lens portion is spaced apart from the rear lens portion, wherein the front lens portion includes
a first lens which is adapted to be disposed at a position facing a lens surface of a second lens as a lens of the rear lens portion, anda support portion which is adapted to extend from a limbus of the first lens to a position of a part of a region from an iris to a ciliary body inside the eye, supports the first lens, and has flexibility, and wherein the support portion includes
an extension portion which is formed in a shape extending toward a lateral side of the first lens and supports the first lens while a portion farthest from the center of the first lens in the shape is adapted to come into contact with the inside of a ciliary sulcus of the eye, anda sub-extension portion which is branched from a side surface of the extension portion, is adapted to extend toward the rear side inside the eye, and is adapted to come into contact with a surface of the ciliary body so that a force of pressing the first lens toward the front side inside the eye is transmitted when the sub-extension portion is pressed by the ciliary body. |
