| 摘要 |
An dynamic multiple focus contact lens has two transparent layers, each with a first annular electromagnet and a second annular electromagnet, a transparent pupil allowing passage of light through the layers, a core between the two layers, at least one loop antenna in communication with the electromagnets, and a transmitter for activating the electromagnets. The layers have a first shape similar to a circular segment that follows the surface of the cornea. The first shape has a first focal length, or power. Upon initiation by a user, a transmitter signals the loop antenna which energizes the electromagnets to mutually attract causing the layers to deflect and the central portion of the first layer to deform outwardly forming the layer into a second shape. The second shape has a second power, stronger than the first shape. |
| 主权项 |
1. A dynamic multiple focus contact lens, said lens being suitable for application upon a human cornea and avoiding damage thereto, and said lens having an initial prescribed strength, comprising:
at least two soft layers, each of said layers having a generally round shape with a perimeter, front surface, an opposite rear surface, an outer edge spanning from said front surface to said rear surface upon said perimeter, and a pupil, each of said layers being transparent and tapering upon said front surface outwardly from said pupil, and said at least two soft layers being coaxial; each of said layers having at least one annular electromagnet embedded therein; each of said layers having at least one power receiver in electrical communication with said at least one electromagnet; each of said layers mutually joined upon the perimeter and having a liquid core, positioned between two of said layers; a radio transmitter capable of signaling said power receiver; wherein said layers provide a first shape to said lens having a first optical characteristic for distance vision correction and wherein said at least one power receiver supplies a maintenance current to said at least one electromagnet; and, wherein upon activation of said transmitter, said at least one power receiver energizes and delivers current to said electromagnets providing a second shape to said lens having a second optical characteristic for near vision correction adding from about +0 diopter to about +3.0 diopters greater than the initial prescribed strength of said lens. |
