Variable power intraocular lens with astigmatism correction
First Claim
1. An intraocular lens apparatus for implantation into an eye comprising:
- an optically clear, flexible, generally circular lens body having a periphery;
a ring having an inner periphery attached to said periphery of said lens body; and
actuating means attached to one of said lens body and said ring for selectively and reversibly altering a shape of said lens body and maintaining an altered shape to adjust characteristics of said lens body including the characteristics of power and astigmatism, said actuating means being responsive to a presence of an external force field for altering said shape.
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Accused Products
Abstract
An intraocular lens has a flexible lens body center portion formed from an optically clear material surrounded by an outer ring which is sensitive to an external force, such as a magnetic force. Utilizing the external force, the shape of the outer ring can be changed to elongate the lens body along a predetermined axis for correcting astigmatism. The outer ring can also be used to change the power of the lens by altering the spherical shape or curvature of the lens. Attached to one of the lens body and the ring is a plurality of actuator bodies of ferromagnetic material which are either permanently magnetized by the external force or are temporarily magnetized and the altered shape is retained by a shape retainer attached to the ring.
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Citations
20 Claims
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1. An intraocular lens apparatus for implantation into an eye comprising:
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an optically clear, flexible, generally circular lens body having a periphery; a ring having an inner periphery attached to said periphery of said lens body; and actuating means attached to one of said lens body and said ring for selectively and reversibly altering a shape of said lens body and maintaining an altered shape to adjust characteristics of said lens body including the characteristics of power and astigmatism, said actuating means being responsive to a presence of an external force field for altering said shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An intraocular lens apparatus for implantation into an eye comprising:
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an optically clear, flexible, generally circular lens body having a periphery; a ring having an inner periphery attached to said periphery of said lens body; and a plurality of actuator means attached to one of said lens body and said ring for selectively and reversibly altering a shape of said lens body and maintaining an altered shape of said lens body to adjust characteristics of said lens body including the characteristics of power and astigmatism, said actuator means being responsive to a presence of an external force field for moving said ring to define said altered shape. - View Dependent Claims (18, 19)
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20. An intraocular lens for implantation into an eye and control means for operating the lens apparatus for changing the power and astigmatism correction of the lens apparatus comprising:
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an optically clear, flexible central lens body; a ring having an inner periphery attached to a periphery of said lens body; electromagnetic energy responsive actuator means attached to one of said lens body and said ring for selectively and reversibly altering the shape of said lens body to adjust the power and astigmatism correction of said lens body; and a control means for generating a selectively variable force field for operating said actuating means, said actuating means being responsive to said force field for altering the shape of said lens body.
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Specification