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 = C i * r 2 1 + 1 - 1 + K i * C i 2 * r 2 + ˆ‘ j = 0 M B ij * r - r i 2 �¢ j + ˆ‘ j = 1 M T ij * r - r i - 1 2 �¢ j
wherein C i is a base radius of curvature of the i th zone, K i an asphericity constant of the i th zone, r i is the height of the i th 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.