Diffractive/refractive lens implant

Abstract

In an intraocular optical implant including a refractive/diffractive lens having an anterior surface and a posterior surface and a generally anterior-posterior optical axis, at least one of the surfaces has a diffractive lens profile covering about half the effective lens area of the lens. Preferably the diffractive lens profile occupies a sectoral portion of the effective lens area, as for example a semicircular sectoral portion, or a plurality of sectoral portions the sum of whose subtended angles is about 180.degree., as for example two sectoral portions each of whose subtended angles is about 90.degree..

Dependencies are inferred from the claim text.