Prismatic intraocular lenses and related methods of in situ alteration of their optical characteristics
First Claim
Patent Images
1. An intraocular lens for restoring visual function to an eye having macular degeneration, the lens comprising:
- a convex lens optic for receiving and focusing light rays;
a prismatic wedge located posterior to the convex lens optic for receiving and directing light rays to a first portion of a retina of the eye; and
means for in situ alteration of the optical characteristics of the prismatic wedge to direct light rays to a second functional portion of the retina.
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Accused Products
Abstract
Prismatic intraocular lenses are disclosed for restoring visual function to an eye having macular degeneration. The lenses each include a convex lens optic for receiving and focusing light rays, a prismatic wedge located posterior to the convex lens optic for receiving and directing light rays to a first portion of a retina of the eye, and means for in situ alteration of the optical characteristics of the intraocular lens to direct light rays to a second functional portion of the retina.
185 Citations
27 Claims
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1. An intraocular lens for restoring visual function to an eye having macular degeneration, the lens comprising:
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a convex lens optic for receiving and focusing light rays; a prismatic wedge located posterior to the convex lens optic for receiving and directing light rays to a first portion of a retina of the eye; and means for in situ alteration of the optical characteristics of the prismatic wedge to direct light rays to a second functional portion of the retina. - View Dependent Claims (2, 3, 4)
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5. An intraocular lens for restoring visual function to an eye having macular degeneration, the lens comprising:
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a convex lens optic for receiving and focusing light rays; a prismatic wedge located posterior to the convex lens optic for receiving and directing light rays to a first portion of a retina of the eye; and means for in situ alteration of the optical characteristics of the intraocular lens to direct light rays to a second functional portion of the retina, wherein the altering means comprises a material having a refractive index capable of changing upon the incidence of laser radiation, the prismatic wedge being comprised of the material. - View Dependent Claims (6, 7, 8)
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9. A lens system for restoring visual function to an eye having macular degeneration, the system comprising:
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an intraocular lens having a convex lens optic for receiving and focusing light rays and a prismatic wedge located posterior to the convex lens optic for receiving and directing light rays to a first portion of a retina of the eye; and means for directing light rays to a second functional portion of the retina comprising a prismatic contact lens positioned over the eye for altering a location that the convex lens optic receives light rays.
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10. A lens system for restoring visual function to an eye having macular degeneration, the system comprising:
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an intraocular lens having a convex lens optic for receiving and focusing light rays and a prismatic wedge located posterior to the convex lens optic for receiving and directing light rays to a first portion of a retina of the eye; and means for in situ alteration of the optical characteristics of the intraocular lens to direct light rays to a second functional portion of the retina, wherein the altering means comprises a member implanted within the eye for mounting the convex lens optic and the prismatic wedge, the member including means for attaching the convex lens optic and the prismatic wedge to the member, the attaching means comprised of a material that changes size upon exposure to incident energy. - View Dependent Claims (11)
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12. An intraocular lens for restoring visual function to an eye having macular degeneration, the lens comprising:
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a convex lens optic for receiving and focusing light rays; a prismatic wedge located posterior to the convex lens optic for receiving and directing light rays to a first portion of a retina of the eye; and means for in situ alteration of the optical characteristics of the intraocular lens to direct light rays to a second functional portion of the retina, wherein the altering means comprises raised members connected to a surface of the convex lens optic for displacing the intraocular lens upon the incidence of laser radiation. - View Dependent Claims (14)
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13. An intraocular lens for restoring visual function to an eye having macular degeneration, the lens comprising:
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a convex lens optic for receiving and focusing light rays; a prismatic wedge located posterior to the convex lens optic for receiving and directing light rays to a first portion of a retina of the eye; and means for in situ alteration of the optical characteristics of the intraocular lens to direct light rays to a second functional portion of the retina, wherein the altering means comprises a ring arranged at the periphery of the convex lens optic, the ring including raised structures for displacing the intraocular lens upon the incidence of laser radiation. - View Dependent Claims (15)
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16. A method of redirecting light rays focused on a first portion of the retina by a prismatic intraocular lens having a convex lens optic and a prismatic wedge to a second functional portion of the retina, the method comprising the steps of:
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providing the convex lens optic within the eye for receiving and focusing light rays; providing the prismatic wedge within the eye posterior to the convex lens optic for receiving and directing light rays to the first portion; in situ altering the optical characteristics of the prismatic wedge to direct light rays to the second functional portion. - View Dependent Claims (17, 18, 19)
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20. A method of redirecting light rays focused on a first portion of the retina by a prismatic intraocular lens having a convex lens optic and a prismatic wedge to a second functional portion of the retina, the method comprising the steps of:
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providing the convex lens optic within the eye for receiving and focusing light rays; providing the prismatic wedge within the eye posterior to the convex lens optic for receiving and directing light rays to the first portion; in situ altering the optical characteristics of the intraocular lens to direct light rays to the second functional portion, wherein the altering step includes altering a refractive index profile of a material comprising the prismatic wedge. - View Dependent Claims (21, 22)
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23. A method of redirecting light rays focused on a first portion of the retina to a second functional portion of the retina, the method comprising the steps of:
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providing a prismatic intraocular lens within the eye, the prismatic intraocular lens having a convex lens optic for receiving and focusing light rays and a prismatic wedge posterior to the convex lens optic for receiving and directing light rays to the first portion; and in situ altering the optical characteristics of the intraocular lens to direct light rays to the second functional portion by providing and positioning a prismatic contact lens over the eye to alter a location that the convex lens optic receives light rays.
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24. A method of redirecting light rays focused on a first portion of the retina by a prismatic intraocular lens having a convex lens optic and a prismatic wedge to a second functional portion of the retina, the method comprising the steps of:
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providing the convex lens optic within the eye for receiving and focusing light rays; providing the prismatic wedge within the eye posterior to the convex lens optic for receiving and directing light rays to the first portion; providing a member within the eye for mounting the convex lens optic and the prismatic wedge, the member having means for attaching the convex lens optic and the prismatic wedge to the member; in situ altering the optical characteristics of the intraocular lens to direct light rays to the second functional portion, wherein the altering step includes changing a size of the attachment means by exposure to incident energy.
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25. A method of redirecting light rays focused on a first portion of the retina by a prismatic intraocular lens having a convex lens optic and a prismatic wedge to a second functional portion of the retina, the method comprising the steps of:
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providing the convex lens optic within the eye for receiving and focusing light rays; providing the prismatic wedge within the eye posterior to the convex lens optic for receiving and directing light rays to the first portion; in situ altering the optical characteristics of the intraocular lens to direct light rays to the second functional portion, wherein the altering step includes displacing the intraocular lens upon laser radiation incident at raised portions of the convex lens optic. - View Dependent Claims (26)
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27. A method for altering a first refractive index profile of a prismatic wedge portion of a prismatic intraocular lens implanted in an eye, the method comprising the steps of:
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determining a location of the prismatic intraocular lens within the eye; determining a magnitude of a prism wedge angle, an orientation, and the first refractive index profile of the prismatic wedge portion; computing a second refractive index profile required to shift a locus of fixation from a first portion of a retina of the eye to a second functional portion of the retina; and delivering a controlled set of laser pulses to points on the prismatic wedge portion in order to alter the first refractive index profile to the second refractive index profile and shift the locus of fixation from the first portion of the retina to the second functional portion of the retina.
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Specification