A pair of multi-focus gradual-variation lens

A pair of multi-focus gradual-variation lens

  • CN 1,815,298 A
  • Filed: 12/22/1999
  • Published: 08/09/2006
  • Est. Priority Date: 12/22/1999
  • Status: Active Grant
First Claim
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1. , a kind of optimization technology of utilizing defines the method for a pair of gradual change eye with lens, each eyeglass has non-spherical surface and principal meridian that has distance vision zone, intermediate-vision zone and near vision zone, and each point on the non-spherical surface has the average sphere degree by the following formula definition:

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