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Refractive-diffractive multifocal lens

  • US 8,197,063 B2
  • Filed: 01/13/2011
  • Issued: 06/12/2012
  • Est. Priority Date: 03/07/2007
  • Status: Active Grant
First Claim
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1. A lens, comprising:

  • an insert having an index of refraction, the insert comprising a diffractive region;

    a host lens having an index of refraction, the host lens comprising a progressive optical power region,wherein the diffractive region and the progressive optical power region are in optical communication and wherein the insert is embedded within the host lens,wherein the diffractive region provides a first incremental add power and the progressive optical power region provides a second incremental add power, the first and second incremental add powers collectively providing a full near add power of the lens,the insert has a thickness ranging from 50 μ

    m to 500 μ

    m, andthe first incremental add power is approximately one-third of the full near add power of the lens.

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