Contrast-enhancing aspheric intraocular lens
First Claim
Patent Images
1. An intraocular lens (IOL), comprising:
- an optic having an anterior refractive surface and a posterior refractive surface, at least one of said anterior or posterior surfaces being characterized by an aspheric profile for controlling the aberrations of an eye in which the IOL is implanted such that a combined lens and cornea exhibit a peak calculated modulation transfer function (MTF) contrast of at least about 0.25 and a depth of field of at least about 0.75 diopters for pupil diameters in a range of about 4.5 mm to about 5 mm for monochromatic light at a wavelength of about 550 nm.
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Accused Products
Abstract
The present invention provides an intraocular lens (IOL) having an optic with a posterior and an anterior refractive surfaces, at least one of which has an aspherical profile, typically characterized by a non-zero conic constant, for controlling the aberrations of a patient'"'"'s eye in which the IOL is implanted. Preferably, the IOL'"'"'s asphericity, together with the aberrations of the patient'"'"'s eye, cooperate to provide an image contrast characterized by a calculated modulation transfer function (MTF) of at least about 0.25 and a depth of field of at least about 0.75 Diopters.
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Citations
29 Claims
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1. An intraocular lens (IOL), comprising:
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an optic having an anterior refractive surface and a posterior refractive surface, at least one of said anterior or posterior surfaces being characterized by an aspheric profile for controlling the aberrations of an eye in which the IOL is implanted such that a combined lens and cornea exhibit a peak calculated modulation transfer function (MTF) contrast of at least about 0.25 and a depth of field of at least about 0.75 diopters for pupil diameters in a range of about 4.5 mm to about 5 mm for monochromatic light at a wavelength of about 550 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An IOL, comprising:
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a refractive optic providing a nominal diopter optical power, said optic having a surface with an aspherical profile for controlling aberrations of an eye of a patient in which said lens is implanted so as to enhance the patient'"'"'s image contrast relative to that by a substantially identical lens having a spherical optic, while providing the patient with a depth of field greater than about 0.75. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An IOL, comprising
an optic having an anterior surface and a posterior surface, at least one of said surfaces having an aspherical profile for controlling aberrations of an eye of a patient in which the lens is implanted so as to provide the patient with an image contrast characterized by a modulation transfer function (MTF) of at least about 0.25 and a depth of field of at least about 0.75 Diopters.
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25. An intraocular lens, comprising:
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an optic having at least one refractive surface, said refractive surface having an aspheric portion for controlling average aberrations exhibited by the eyes of a selected patient group such that upon implantation of said lens in a patient'"'"'s eye the combined lens and the cornea exhibit a peak modulation transfer function (MTF) contrast of at least about 0.25 for monochromatic light having a wavelength of 550 nm and a depth of field of at least about 0.75 Diopters. - View Dependent Claims (26)
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27. An intraocular lens, comprising:
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an optic comprising at least one refractive surface having a base characterized by a profile described by the following relation;
wherein z denotes a sag of the surface parallel to an axis (z) perpendicular to the surface, C denotes a curvature at the vertex of the surface, Q denotes a conic coefficient, R denotes a radial position on the surface, A denotes a fourth order deformation coefficient, and B denotes a sixth order deformation coefficient, wherein Q is in a range of about 0 to about 100, A is in a range of about −
1×
10−
3 to about 1×
10−
3, and B is in a range of about −
1×
10−
4 to about 1×
10−
4.
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28. A method of designing an intraocular lens having an anterior and a posterior refractive surface, comprising:
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deriving a model average of aberrations of the eye based on wavefront measurements of aberrations exhibited by the eyes of a selected patient population, and adjusting asphericity of at least one of said refractive surfaces for controlling said average aberrations such that a patient in which the lens is implanted would exhibit an image contrast characterized by a peak modulation transfer function (MTF) contrast of at least about 0.25 and a depth of field of at least about 0.75 D.
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29. An intraocular lens (IOL), comprising:
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an optic having an anterior refractive surface and a posterior refractive surface, at least one of said surfaces having a generally toric shape exhibiting different optical power values along two orthogonal surface directions and having an asphericity along at least one of said orthogonal directions for controlling aberrations of an eye in which the IOL is implanted such that the combination of the lens and the eye exhibits a modulation transfer function of at least about 0.25 and a depth of field of at least about 0.75 D for a pupil size of about 4.5 mm and a monochromatic wavelength of about 550 nm as calculated in a model eye.
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Specification