Patent ID: 8157374
Filing Date: 2012-04-17
Classification: A61F,G02C

Abstract:
1. An ophthalmic lens, comprising: an optic having an anterior surface, a posterior surface, and an optical axis, the optic having a refractive optical power; a central phase plate having a diffractive power configured such that the lens is able to direct light to a first focus configured to provide near or intermediate vision and a second focus configured to provide distant vision, the central phase plate comprising a first base curvature having a radius of curvature; an intermediate phase plate surrounding the central phase plate configured to change the overall resultant intensity of light directed to the second focus; and an outer refractive region having no diffractive optical power surrounding the intermediate phase plate and configured to direct light to the second focus, the outer refractive region having an aspheric shape configured to reduce an optical aberration.