Patent ID: 7188949

Claim:
An ophthalmic lens, comprising: an optic having an anterior surface, a posterior surface, a first base curvature, and an optical axis; a multifocal phase plate configured to direct light to a first focus and a second focus, the multifocal phase plate comprising a first plurality of echelettes centered about a first base curvature in a direction that is parallel to the optical axis, the first base curvature having a first radius of curvature; an intermediate phase plate surrounding the multifocal phase plate and configured to change the overall resultant amplitude and distribution of light directed to the second focus, the intermediate phase plate comprising a second plurality of echelettes centered about the first base curvature or about a second base curvature having a second radius of curvature different from the first radius of curvature; and an outer refractive region having a refractive optical power and no diffractive optical power, the outer refractive region surrounding the intermediate phase plate and configured to direct light to the first focus.