Toric intraocular lens with modified power characteristics
First Claim
1. A tonic ophthalmic lens comprising an optical element, the optical element having meridians associated therewith, including a high power meridian and a low power meridian orthogonal to the high power meridian, the optical element having at least one radially modulated meridian along which power monotonically and strictly varies in a continuous manner with increasing radial position along the entire radially modulated meridian.
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Accused Products
Abstract
An intraocular lens for correcting or reducing the astigmatism of a cornea includes an optical element that has optical properties and characteristics that make it tolerant of rotational misalignment, when compared to a comparable lens having a uniform astigmatism orientation across its entire optical element, leading to more relaxed tolerances for a surgeon that implants the lens. The optical element of the toric ophthalmic lens has meridians associated therewith, including a high power meridian and a low power meridian orthogonal to the high power meridian. The optical element has at least one radially modulated meridian along which power monotonically varies with increasing radial position.
230 Citations
14 Claims
- 1. A tonic ophthalmic lens comprising an optical element, the optical element having meridians associated therewith, including a high power meridian and a low power meridian orthogonal to the high power meridian, the optical element having at least one radially modulated meridian along which power monotonically and strictly varies in a continuous manner with increasing radial position along the entire radially modulated meridian.
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8. A tonic ophthalmic lens comprising an optical element, the optical element having meridians associated therewith, including a high power meridian and a low power meridian orthogonal to the high power meridian, the power varying with increasing radial position,
wherein along the high power meridian: -
between an originating position and a respective first radial position, power equals a respective nominal power; between the respective first radial position and a respective second radial position, power is greater than the respective nominal power; and between the respective second radial position and a respective third radial position, power is less than the respective nominal power; wherein the power between the originating position and the respective third radial position monotonically varies in a continuous manner, such that the power monotonically and strictly varies with increasing radial position along an entire length of the high power meridian. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification