Extended depth of focus (EDOF) lens to increase pseudo-accommodation by utilizing pupil dynamics

摘要

In one aspect, the present invention provides an ophthalmic lens (e.g., an IOL) that includes an optic having an anterior surface and a posterior surface disposed about an optical axis. At least one of the surfaces (e.g., the anterior surface) has a profile characterized by superposition of a base profile and an auxiliary profile. The auxiliary profile can include an inner region, an outer region and a transition region between the inner and the outer regions, where an optical path difference across the transition region (i.e., the optical path difference between the inner and the outer radial boundaries of the transition region) corresponds to a non-integer fraction (e.g., ½) of a design wavelength (e.g., a wavelength or about 550 nm).

主权项

1. A monofocal intraocular lens, comprising:
an optic having an anterior surface and a posterior surface disposed about an optical axis, at least one of said surfaces being toric and at least one of said surfaces comprising:
at least one inner refractive region having a nominal optical power,at least one outer refractive region having the nominal optical power, anda refractive transition region disposed between said inner and outer regions, said transition region extending from an inner radial boundary to an outer radial boundary thereof, wherein said transition region is adapted such that a phase of radiation incident thereon varies linearly over at least a portion of the radial extent between said inner to said outer boundary so as to generate a phase shift between said outer and inner boundaries characterized by a selected non-integer fraction of a design wavelength in the visible spectrum such that a first portion of an incoming wavefront in the inner refractive region and a second portion of the incoming wavefront in the outer refractive region converge to produce an effective optical power different from the nominal optical power thereby creating a depth of focus.