Multi-zonal monofocal intraocular lens for correcting optical aberrations

摘要

A multi-zonal monofocal ophthalmic lens comprises a first lens surface and a second lens surface disposed opposite the first lens surface. The first lens surface comprises at least two zones designated by successive integers i, the surface being characterized by a sag that varies according to the relationship: Sag=Ci*r21+1-1+Ki*Ci2*r2+∑j=0MBij*r-ri2⁢j+∑j=1MTij*r-ri-12⁢j
wherein Ci is a base radius of curvature of the ith zone, Ki an asphericity constant of the ith zone, ri is the height of the ith zone, and the Bij and Tij are boundary parameters selected to smoothly connect the zones, and M is an integer selected to provide a predetermined amount of smoothness over the Transition between zones. The zones are configured to focus light entering the zones from a distant point source to substantially a single point such that the light substantially falls within the range of the depth-of-focus of a spherical lens having an equivalent focal length.