TORIC INTRAOCULAR LENS WITH MODIFIED POWER CHARACTERISTICS
First Claim
1. A toric 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 varies with increasing radial position.
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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.
100 Citations
25 Claims
- 1. A toric 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 varies with increasing radial position.
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12. A toric 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:
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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. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method of manufacturing a toric ophthalmic lens having meridians associated therewith, including a reference meridian, a high power meridian, and a low power meridian orthogonal to the high power meridian, the method comprising:
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providing a standard toric lens function that defines power such that each meridian corresponds to a respective constant power; applying a modification function to the standard toric lens function to obtain a modified toric lens function, wherein the modification function is a function of radial position and angle position relative to the reference meridian, and wherein the modified toric lens function results in non-constant power along at least one meridian; and fabricating the toric ophthalmic lens in accordance with the modified toric lens function. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification