MULTIZONAL LENS WITH EXTENDED DEPTH OF FOCUS
First Claim
1. An intraocular lens, comprising:
- an optic comprising;
a clear aperture having a diameter;
an anterior surface and an opposing posterior surface, the surfaces disposed about an optical axis;
a central zone having a plurality of optical powers that progressively vary between a first optical power at a center of the central zone and a second optical power at a periphery of the central zone, the absolute value of the difference between the first optical power and the second optical power being between about 0.5 Diopter and about 1.5 Diopters; and
an outer zone disposed about the central zone, the outer zone comprising a third optical power and a negative spherical aberration over the entire zone, the outer zone having an outer diameter that is equal to the diameter of the clear aperture;
the optic having a variation in optical power over the entire clear aperture that is less than about 1.5 Diopters.
1 Assignment
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Accused Products
Abstract
An intraocular lens for providing enhanced vision includes an optic with a clear aperture over which light may be focused onto or near the retina of an eye. The optic includes an anterior surface and an opposing posterior surface, the surfaces disposed about an optical axis. The optic includes a central zone and an outer zone disposed about the central zone. The central zone comprises a plurality of optical powers that progressively vary between a first optical power at a center of the central zone and a second optical power at a periphery of the central zone, wherein the absolute value of the difference between the first optical power and the second optical power being between predetermined values. The outer zone comprises a third optical power and may also have a negative spherical aberration. The optic typically has a variation in optical power over the entire clear aperture that is less than a predetermined amount.
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Citations
20 Claims
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1. An intraocular lens, comprising:
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an optic comprising; a clear aperture having a diameter; an anterior surface and an opposing posterior surface, the surfaces disposed about an optical axis; a central zone having a plurality of optical powers that progressively vary between a first optical power at a center of the central zone and a second optical power at a periphery of the central zone, the absolute value of the difference between the first optical power and the second optical power being between about 0.5 Diopter and about 1.5 Diopters; and an outer zone disposed about the central zone, the outer zone comprising a third optical power and a negative spherical aberration over the entire zone, the outer zone having an outer diameter that is equal to the diameter of the clear aperture; the optic having a variation in optical power over the entire clear aperture that is less than about 1.5 Diopters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of malting an intraocular lens, comprising:
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forming an anterior surface and an opposing posterior surface, the surfaces being disposed about an optical axis and providing a clear aperture; forming a central zone comprising a plurality of optical powers that progressively vary between a first optical power at a center of the central zone and a second optical power at a periphery of the central zone, the absolute value of the difference between the first optical power and the second optical power being between about 0.25 Diopter and about 1 Diopter; forming outer zone disposed about the central zone, the outer zone comprising a third optical power and a negative spherical aberration; the optic having a variation in optical power over the entire clear aperture that is less than about 1 Diopter.
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Specification