Patent ID: 8747466

Claim:
An intraocular lens, comprising: an optic including a first surface having a first shape and an opposing second surface having a second shape, the first and second shapes providing a refractive power; a diffractive pattern imposed on at least one of the first shape and the second shape with a concentric central zone having a center and a plurality of concentric zones surrounding the central zone wherein the central zone and the plurality of concentric zones are each comprised of an edge with a step discontinuity at the edge having a step height between about 1 micron and 3.3 microns, wherein the central zone is configured such that the edge of the central zone is 360° out of phase with the center of the central zone; and wherein the first and second surfaces provide a base power and an add power that is between 0.5 Diopter and 1.5 Diopter so that the intraocular lens has a depth of focus that exceeds that of any single focus of a similar spherical lens having an optical power equal to the base power of the intraocular lens.