Enhanced toric lens that improves overall vision where there is a local loss of retinal function
First Claim
1. An optic configured to improve vision for a patient'"'"'s eye, the optic comprising:
- a surface configured to improve image quality of an image produced by light incident on the patient'"'"'s eye at an oblique angle with respect to an optical axis intersecting the eye and focused at a peripheral retinal location disposed at a distance from the fovea,wherein the image quality is improved by reducing oblique astigmatism at the peripheral retinal location,wherein a modulation transfer function (MTF) of the optic at one or more spatial frequencies for light incident on the optic and forming an image at the peripheral retinal location at an eccentricity having a value between about 1 degree and about 25 degrees is greater than a modulation transfer function (MTF) of the optic at one or more spatial frequencies for light incident on the optic and forming an image at the peripheral retinal location at an eccentricity having a value between 0 degrees and less than 1 degree.
1 Assignment
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Accused Products
Abstract
Systems and methods are provided for improving overall vision in patients suffering from a loss of vision in a portion of the retina (e.g., loss of central vision) by providing an enhanced toric lens which redirects and/or focuses light incident on the eye at oblique angles onto a peripheral retinal location. The intraocular lens can include a redirection element (e.g., a prism, a diffractive element, or an optical component with a decentered GRIN profile) configured to direct incident light along a deflected optical axis and to focus an image at a location on the peripheral retina. Optical properties of the intraocular lens can be configured to improve or reduce peripheral errors at the location on the peripheral retina. One or more surfaces of the intraocular lens can be a toric surface, a higher order aspheric surface, an aspheric Zernike surface or a Biconic Zernike.
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Citations
15 Claims
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1. An optic configured to improve vision for a patient'"'"'s eye, the optic comprising:
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a surface configured to improve image quality of an image produced by light incident on the patient'"'"'s eye at an oblique angle with respect to an optical axis intersecting the eye and focused at a peripheral retinal location disposed at a distance from the fovea, wherein the image quality is improved by reducing oblique astigmatism at the peripheral retinal location, wherein a modulation transfer function (MTF) of the optic at one or more spatial frequencies for light incident on the optic and forming an image at the peripheral retinal location at an eccentricity having a value between about 1 degree and about 25 degrees is greater than a modulation transfer function (MTF) of the optic at one or more spatial frequencies for light incident on the optic and forming an image at the peripheral retinal location at an eccentricity having a value between 0 degrees and less than 1 degree. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification