592572 Disclosed is a multifocal intraocular lens (IOL) (64) that can provide refractive and diffractive optical focusing powers. The lens (64) has an optic having an anterior surface (66) and a posterior surface (68), the optic having a central refractive region (70) for providing one refractive focusing power, and a diffractive region (72) disposed on one of the surfaces so as to provide a near and a far diffractive focusing powers. The diffractive region (72) comprises a plurality of annular diffractive zones surrounding the central refractive region (70) separated from one another by a plurality of steps. The first step at the central refractive region (70) has a reduced step height from a next outermost step so as to alter the phase of the central refractive region (70) to provide increased light to the refractive focusing power, and the next outermost step and subsequent after steps have a substantially uniform step height greater than the reduced step height.
