Patent ID: 8486141

Claim:
A multi-zonal monofocal ophthalmic lens comprising: an optic disposed about an optical axis comprising a first lens surface and a second lens surface disposed opposite the first lens surface; the first lens surface comprising a plurality of zones, including: a first zone having a finite radial width and a sag surface characterized by a first base radius of curvature value and a first asphericity constant; and a second zone surrounding the first zone and having a finite radial width and a sag surface characterized by a second base radius of curvature value and a second asphericity constant; the radius of curvature values are unequal, the asphericity constants are unequal, or the radius of curvature values are unequal and the asphericity constants are unequal; the zones configured to focus light entering the entire optic from a distant point source to substantially a single point, the lens having a maximum Diopter power difference between any two zones of the lens that is less than 0.75 Diopters.