Dual-optic intraocular lens that improves overall vision where there is a local loss of retinal function
First Claim
1. An intraocular lens configured to improve vision for a patient'"'"'s eye, the intraocular lens (IOL) comprising:
- a first viewing element comprising a first surface and a second surface opposite the first surface;
a second viewing element comprising a third surface and a fourth surface opposite the third surface; and
at least one haptic connected to one of the first or second viewing elements,wherein the patient'"'"'s eye is intersected by an optical axis, and the IOL is configured to improve image quality of an image produced by light incident on the patient'"'"'s eye at an oblique angle having a value between 1 and 25 degrees with respect to the optical axis and focused at a peripheral retinal location disposed at a distance from the fovea,wherein the image quality is improved by reducing oblique astigmatism due to light being incident on the patient'"'"'s eye at an oblique angle with respect to the optical axis at the peripheral retinal location, andwherein a modulation transfer function (MTF) of the IOL at one or more spatial frequencies for light incident on the IOL at the oblique angle having a value between 1 and 25 degrees with respect to the optical axis at the peripheral retinal location is greater than a modulation transfer function (MTF) of the IOL at one or more spatial frequencies for light incident on the optic at an angle less than 1 degree with respect to the optical axis at the fovea.
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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 a dual optic intraocular 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 surface to reduce optical errors in an image produced at a peripheral retinal location by light incident at oblique angles.
180 Citations
11 Claims
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1. An intraocular lens configured to improve vision for a patient'"'"'s eye, the intraocular lens (IOL) comprising:
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a first viewing element comprising a first surface and a second surface opposite the first surface; a second viewing element comprising a third surface and a fourth surface opposite the third surface; and at least one haptic connected to one of the first or second viewing elements, wherein the patient'"'"'s eye is intersected by an optical axis, and the IOL is configured to improve image quality of an image produced by light incident on the patient'"'"'s eye at an oblique angle having a value between 1 and 25 degrees with respect to the optical axis and focused at a peripheral retinal location disposed at a distance from the fovea, wherein the image quality is improved by reducing oblique astigmatism due to light being incident on the patient'"'"'s eye at an oblique angle with respect to the optical axis at the peripheral retinal location, and wherein a modulation transfer function (MTF) of the IOL at one or more spatial frequencies for light incident on the IOL at the oblique angle having a value between 1 and 25 degrees with respect to the optical axis at the peripheral retinal location is greater than a modulation transfer function (MTF) of the IOL at one or more spatial frequencies for light incident on the optic at an angle less than 1 degree with respect to the optical axis at the fovea. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification