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Enhanced monofocal ophthalmic lens

  • US 6,126,286 A
  • Filed: 04/29/1999
  • Issued: 10/03/2000
  • Est. Priority Date: 05/21/1996
  • Status: Expired due to Term
First Claim
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1. An ophthalmic lens for providing a monofocal vision correction power with an enhanced depth of focus, the ophthalmic lens being adapted to be implanted in an eye or to be disposed on or in a cornea and having a central optical axis and a baseline diopter power for far vision correction, the ophthalmic lens comprising:

  • a first zone surrounding and extending from the central optical axis and having a first vision correction power, the vision correction power at the central optical axis being the baseline optical power;

    a second zone located radially outwardly of the first zone and having a second vision correction power which differs from the first vision correction power, one of the first and second vision correction powers being a near vision correction power relative to the baseline diopter power and the other of the first and second vision correction powers being a far, far vision correction power relative to the baseline diopter power;

    a third zone located radially outwardly of the second zone and having a third vision correction power which is substantially the same as the first vision correction power; and

    a fourth zone located radially outwardly of the third zone and having a fourth correction power which is substantially the same as the second vision correction power, the first, second, third and fourth zones being adapted to assist the ophthalmic lens in providing a monofocal vision correction power with an enhanced depth of focus.

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