Patent · US Active

Multifocal contact lenses and related methods and uses to improve vision of presbyopic subjects

US8882265B2 · kind B2 · utility

0Cited by
17References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 22, 2013
Grant dateNov 11, 2014
Priority date—
Expiry dateJan 22, 2033

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02C7/044
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

Multifocal contact lenses and methods and uses are described. The multifocal contact lenses include an optic zone. The optic zone has an aspheric power profile that provides a near vision refractive power and a distance vision refractive power, and provides an Add power that corresponds to the difference between the near vision refractive power and the distance vision refractive power. The multifocal contact lenses can improve binocular vision of presbyopic subjects by being prescribed such that the non-dominant eye contact lens is over-corrected for distance vision, and both multifocal contact lenses are under-corrected for the Add power requirement of the subject. Batches and sets of multifocal contact lenses are also described.

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