Toric optic for ophthalmic use
First Claim
1. An ophthalmic lens, comprising:
- an optic body disposed about an optical axis having a primary meridian and an orthogonal secondary meridian, the optic body comprising an anterior surface and an opposing posterior surface, the optic body including an optic zone comprising a base shape configured to form an image from light incident on the surfaces;
a base toric shape imposed on one of the surfaces, the base toric shape including a low power meridian having a low optical power and a high power meridian having a high optical power equal to the low optical power plus a cylinder optical power; and
a higher order toric shape imposed on one of the surfaces, the higher order toric shape including a first profile disposed along the primary meridian and a second profile disposed along the secondary meridian that is different in shape from the first profile, the higher order toric shape being characterized by a profile along at least one meridian of the ophthalmic lens that changes with increasing radius from the optical axis raised to a power that is greater than two.
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Accused Products
Abstract
An ophthalmic lens for modifying or reducing non-axisymmetric higher order aberrations includes an optic body disposed about an optical axis having a primary meridian and an orthogonal secondary meridian. The optic body comprises an anterior surface and an opposing posterior surface. The optic body includes an optic zone comprising a base shape that is configured to form an image or focus from light incident on the surfaces, either alone or when used within an optical system. The optic body also includes a higher order toric shape that is imposed on or added to one of the surfaces. The higher order toric shape also includes a first profile disposed along the primary meridian and a second profile disposed along the secondary meridian that is different in shape from the first profile. The higher order toric shape is characterized by a profile along at least one meridian of the lens that changes with increasing radius from the optical axis raised to a power that is greater than two.
48 Citations
20 Claims
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1. An ophthalmic lens, comprising:
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an optic body disposed about an optical axis having a primary meridian and an orthogonal secondary meridian, the optic body comprising an anterior surface and an opposing posterior surface, the optic body including an optic zone comprising a base shape configured to form an image from light incident on the surfaces; a base toric shape imposed on one of the surfaces, the base toric shape including a low power meridian having a low optical power and a high power meridian having a high optical power equal to the low optical power plus a cylinder optical power; and a higher order toric shape imposed on one of the surfaces, the higher order toric shape including a first profile disposed along the primary meridian and a second profile disposed along the secondary meridian that is different in shape from the first profile, the higher order toric shape being characterized by a profile along at least one meridian of the ophthalmic lens that changes with increasing radius from the optical axis raised to a power that is greater than two. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An ophthalmic lens, comprising:
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an optic body disposed about an optical axis having a primary meridian and an orthogonal secondary meridian, the optic body comprising an anterior surface and an opposing posterior surface, the optic body including an optic zone comprising a base shape configured to form an image from light incident on the surfaces; a base toric shape imposed on one of the surfaces, the base toric shape including a low power meridian having a low optical power and a high power meridian having a high optical power equal to the low optical power plus a cylinder optical power; wherein at least one of the anterior surface and the posterior surface includes an axisymmetric aspheric shape characterized by a conoid of rotation defined by a profile defined by a base curvature and a conic constant. - View Dependent Claims (18, 19, 20)
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Specification