Patent · US Active

Progressive reading and intermediate distance lens defined by employment of a zernike expansion

US8939578B2 · kind B2 · utility

1Cited by
28References
16Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJan 24, 2013
Grant dateJan 27, 2015
Priority date—
Expiry dateJan 24, 2033

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02C7/066
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

There is provided a lens that includes a corridor having a width greater than or equal to about 6 millimeters. The lens has astigmatism less than or equal to about 0.5 diopter within the corridor. There is also provided an item of eyewear that includes such a lens, and a method for representing a surface of an ophthalmic lens.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.