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Ophthalmic lens, systems and methods having at least one rotationally asymmetric diffractive structure

  • US 8,894,204 B2
  • Filed: 12/16/2011
  • Issued: 11/25/2014
  • Est. Priority Date: 12/17/2010
  • Status: Active Grant
First Claim
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1. An ophthalmic lens for correcting vision, comprising:

  • an optic having at least a toric portion for correcting astigmatism and having a base cylinder power; and

    less than 4 rotationally asymmetric diffractive echelettes integrated with the lens for extending depth of focus, wherein the extended depth of focus reduces sensitivity of the optic to at least one of rotation and the base cylinder power.

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