Multifocal ophthalmic lens
First Claim
1. A multifocal ophthalmic lens for providing vision correction powers, said lens being adapted for implantation in an eye or to be disposed on or in the cornea, said lens having a baseline diopter power for far vision correction power, said lens having a central zone and a first outer zone radially outwardly of the central zone, said central zone having a progressive power region in which the vision correction powers vary progressively and in radially outwardly extending order from an intermediate vision correction power, to a far vision correction power and then to a diopter power which is less than the baseline diopter power.
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Accused Products
Abstract
A multifocal ophthalmic lens adapted for implantation in the eye or to be disposed on or in the cornea. The lens has an optical axis, a central zone and a plurality of annular zones circumscribing the central zone. Two of the annular zones have a first region with a far vision correction power and a second region with a near vision correction power. In an IOL embodiment, the vision correction power between far and near is progressive, and each of the second regions has a major segment in which the near vision correction power is substantially constant. The power in the central zone varies.
388 Citations
34 Claims
- 1. A multifocal ophthalmic lens for providing vision correction powers, said lens being adapted for implantation in an eye or to be disposed on or in the cornea, said lens having a baseline diopter power for far vision correction power, said lens having a central zone and a first outer zone radially outwardly of the central zone, said central zone having a progressive power region in which the vision correction powers vary progressively and in radially outwardly extending order from an intermediate vision correction power, to a far vision correction power and then to a diopter power which is less than the baseline diopter power.
- 16. A multifocal ophthalmic lens for providing variable vision correction power, said lens being adapted for implantation in an eye or to be disposed on or in the cornea, said lens having an optical axis, said lens having a plurality of annular zones circumscribing the optical axis, each of first and second of said annular zones having a far vision correction power and a region having a near vision correction power, the vision correction power between the far and near vision correction powers being progressive, each of said regions having a major segment in which the near vision correction power is substantially constant, the lens having a central zone circumscribed by the annular zones, said central zone having a progressive vision correction power which is less than near vision correction power throughout the full radial dimension of the central zone.
- 25. A multifocal ophthalmic lens for providing variable vision correction power, said lens being adapted for implantation in an eye or to be disposed on or in a surface of the cornea, said lens having an optical axis and a plurality of annular zones circumscribing the optical axis, each of at least said first and second annular zones having a region with a near vision correction power, the vision correction power in each of said first and second annular zones increasing in a radial outward direction and relatively rapidly from a far vision correction power to a maximum near vision correction power, then decreasing in a radial outward direction more slowly during at least a major segment of said region and then decreasing in a radial outward direction more rapidly to a far vision correction power, the second annular zone circumscribing the first annular zone.
- 33. A multifocal ophthalmic lens for providing variable vision correction power, said lens adapted for implantation in an eye or to be disposed on or in a surface of the cornea, said lens having a baseline diopter power for far vision correction power, said lens having a central zone and a first outer zone radially outwardly of the central zone, said central zone having a peripheral region with a negative diopter power which is less than the baseline diopter power whereby the depth of focus of the central zone is increased.
Specification