Patent ID: 7926941
Filing Date: 2011-04-19
Classification: G02C

Abstract:
1. A lens, comprising: a distance vision zone, a far-intermediate vision zone, an intermediate vision zone and a near vision zone; a first layer comprising a first index of refraction; a second layer comprising a second index of refraction different than the first index of refraction; a first surface of the first layer comprising a first incremental add power region contributing a first portion of a total add power of the lens; and a second surface of the second layer comprising a second incremental add power region contributing a second portion of a total add power of the lens, wherein a portion of a boundary of the second incremental add power region forms an optical discontinuity adjacent to the distance vision zone of the lens, wherein the first and second incremental add power regions are positioned to be in optical communication so as to form the far-intermediate vision zone, the intermediate vision zone and the near vision zone.