| 摘要 |
The novel variable-power accommodative intraocular lens consists of a central body or optical region having at least four dioptre surfaces separating a minimum of three media. These are connected by means of a substrate comprising same in an equatorial form and containing the bases of the attachments for the lens. The power of the lens changes in response to variations in the equatorial diameter of the media that form the optical region. The design of the lens enables variations in the optical power of the lens that are higher than one dioptre per micrometer of equatorial compression. This is obtained by means of the effective change in the curvature radii of the dioptre surfaces forming the optical region, and the central thicknesses along the optical axis of the different media defining said dioptre surfaces. The intraocular lens operates preferably in combination with a capsular ring, to which the attachments are fixed, the outer diameter of said ring determining the power of the lens. The mechanism for changing the power of the lens is initiated by the contraction of the ciliary muscle of the patient in response to an accommodative force. |
