Extended Depth of Focus (EDOF) Lens to Increase Pseudo-Accommodation by Utilizing Pupil Dynamics
First Claim
1. An ophthalmic lens, comprisingan optic having an anterior surface and a posterior surface disposed about an optical axis,at least one of said surfaces having a profile characterized by superposition of a base profile and an auxiliary profile, said auxiliary profile comprising at least a first region, at least a second region and a transition region therebetween,wherein an optical path difference across said transition region corresponds to a non-integer fraction of a design wavelength.
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Accused Products
Abstract
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 of about 550 nm).
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Citations
33 Claims
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1. An ophthalmic lens, comprising
an optic having an anterior surface and a posterior surface disposed about an optical axis, at least one of said surfaces having a profile characterized by superposition of a base profile and an auxiliary profile, said auxiliary profile comprising at least a first region, at least a second region and a transition region therebetween, wherein an optical path difference across said transition region corresponds to a non-integer fraction of a design wavelength.
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11. An ophthalmic lens, comprising
an optic having an anterior surface and a posterior surface disposed about an optical axis, at least one of said surfaces comprising at least one inner refractive region, at least one outer refractive region, and a 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 monotonically from said inner to said outer boundary so as to generate a phase shift between said outer and inner boundaries characterized by a non-integer fraction of a design wavelength.
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21. An ophthalmic lens, comprising
an optic having an anterior surface and a posterior surface disposed about an optical axis, each of said surfaces having a base surface profile, a pattern of surface variations superimposed on the base surface profile of at least one of said surfaces so as to generate a transition surface region extending between an inner and an outer surface regions, wherein said transition region causes the optic to exhibit an asymmetric through-focus modulation transfer function for light incident on said optic through an aperture having a diameter in a range of about 1.5 mm to about 6 mm for a design wavelength.
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24. An ophthalmic lens, comprising
an optic having an anterior surface and a posterior surface, each surface having a base profile such that said profiles cooperatively impart a nominal optical power to said optic, at least one of said surfaces having a profile defined by addition of an auxiliary surface profile to its nominal surface profile, said auxiliary profile being characterized by a central region, an outer region and a transition region extending between said inner and outer regions, wherein said auxiliary profile is adapted to cause a shift between an effective optical power and said nominal optical power of the optic for light having a design wavelength and incident on the optic through an aperture having a size in a selected range.
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29. An ophthalmic lens, comprising
an optic having an anterior surface and a posterior surface disposed about an optical axis, at least one of said surfaces comprising at least an inner refractive region and at least an outer refractive region, wherein a profile of said at least one surface is configured to impart a monotonically changing phase shift to incident radiation from an outer boundary of the inner region to an inner boundary of the outer region to provide a phase shift between the two boundaries that is a non-integer fraction of a design wavelength.
Specification