Toric contact lenses with controlled optical power profile
First Claim
1. A toric contact lens, comprising an optical axis, an anterior surface having a first optical zone, and an opposite posterior surface having a second optical zone, wherein one of the first optical zone or the second optical zone is a toroidal surface whereas the other zone is non-toroidal surface which is a spherical surface or an aspheric surface, wherein the toroidal and non-toroidal surfaces combine to provide a targeted cylindrical optical power and a targeted spherical optical power, wherein at least one of the first and second optical zone has an aspherical surface which is designed to provide, in combination with the surface of the other optical zone, a controlled optical power profile which is substantially rotationally-symmetric with respect to the optical axis or incorporates a spherical aberration component, wherein the spherical aberration component is described by any one of fourth order, sixth order, eighth order Zernike spherical aberration-like terms and has a spherical aberration value of from about −
- 0.5 diopter to about −
1.5 diopters at a distance of 3 mm from the optical axis.
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Accused Products
Abstract
The present invention provides a toric contact lens having a controlled optical power profile. In addition, the invention provides a series of toric contact lenses, each having a series of different targeted cylindrical optical powers and a series of different targeted spherical optical powers, and each having a spherical aberration profile in which (1) the optical power deviations of the lens are substantially constant; (2) power deviation at a distance of 3 mm from the optical axis is from about −0.5 diopter to about −1.5 diopters; (3) power deviation at a distance of 3 mm from the optical axis is from about 0.2 diopter to about 1.0 diopter smaller than power deviations at a distance of 2 mm from the optical axis; or (4) there is a spherical aberration component described by any one of fourth order, sixth order, eighth order Zernike spherical aberration-like terms, or combination thereof, wherein the spherical aberration component has a value of −0.5 diopter to about −1.5 diopters at a distance of 3 mm from the optical axis.
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Citations
27 Claims
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1. A toric contact lens, comprising an optical axis, an anterior surface having a first optical zone, and an opposite posterior surface having a second optical zone, wherein one of the first optical zone or the second optical zone is a toroidal surface whereas the other zone is non-toroidal surface which is a spherical surface or an aspheric surface, wherein the toroidal and non-toroidal surfaces combine to provide a targeted cylindrical optical power and a targeted spherical optical power, wherein at least one of the first and second optical zone has an aspherical surface which is designed to provide, in combination with the surface of the other optical zone, a controlled optical power profile which is substantially rotationally-symmetric with respect to the optical axis or incorporates a spherical aberration component, wherein the spherical aberration component is described by any one of fourth order, sixth order, eighth order Zernike spherical aberration-like terms and has a spherical aberration value of from about −
- 0.5 diopter to about −
1.5 diopters at a distance of 3 mm from the optical axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- 0.5 diopter to about −
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12. A series of toric contact lenses, each having a targeted spherical optical power of from about −
- 15 diopters to about 10 diopters and a targeted cylindrical optical power, wherein each contact lens in the series has an optical axis, an anterior surface having a first optical zone, and an opposite posterior surface having a second optical zone, wherein one of the first and second optical zones is a toroidal surface whereas the other optical zone is a non-toroidal spherical or aspherical surface, wherein the surface of at least one of the first and second optical zone is designed to provide, in combination with the surface of the other optical zone, provide a controlled optical power profile in which (1) the optical power deviations of the lens are substantially constant;
(2) power deviation at a distance of 3 mm from the optical axis is from about −
0.5 diopter to about −
1.5 diopters;
(3) power deviation at a distance of 3 mm from the optical axis is from about 0.2 diopter to about 1.0 diopter smaller than power deviations at a distance of 2 mm from the optical axis;
or (4) there is a spherical aberration component described by any one of fourth order, sixth order, eighth order Zernike spherical aberration-like terms, or combination thereof, wherein the spherical aberration component has a value of −
0.5 diopter to about −
1.5 diopters at a distance of 3 mm from the optical axis. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
- 15 diopters to about 10 diopters and a targeted cylindrical optical power, wherein each contact lens in the series has an optical axis, an anterior surface having a first optical zone, and an opposite posterior surface having a second optical zone, wherein one of the first and second optical zones is a toroidal surface whereas the other optical zone is a non-toroidal spherical or aspherical surface, wherein the surface of at least one of the first and second optical zone is designed to provide, in combination with the surface of the other optical zone, provide a controlled optical power profile in which (1) the optical power deviations of the lens are substantially constant;
Specification