| 摘要 |
<p>An ophthalmic lens having a size, shape, and composition adapted to be supported by the human eye in the optical path of the eye as an intraocular, contact, or corneal implant lens, includes a biocompatible lens body (12) having a size and shape adapted to be supported by a human eye in the optical path of the eye. An optical portion (13) of the lens body has anterior and posterior surfaces (15,16) and a grooved portion (14) defining a modified Fresnel or echelon lens pattern in at least one of the anterior and posterior surfaces. The modified echelon lens pattern includes, between the grooves (17), annular zones that are configured so that at least some of the annular zones exhibit optical characteristics that vary circumferentially in order to at least partially correct for astigmatism.</p> |
