Patent · US Active

Progressive multifocal contact lens and producing method thereof

US10274750B2 · kind B2 · utility

1Cited by

4References

16Claims

0Family size

Assignee

National Taiwan University of Science and Technology · TW

Inventors

Thi-Lien Vu · Taipei, TW
Chao Chen · Taipei, TW
Yu Qiu · Chongqing, CN

Key dates

Filing date	Feb 15, 2017
Grant date	Apr 30, 2019
Priority date	—
Expiry date	Jun 11, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/068
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A progressive multifocal contact lens and producing method thereof are provided. The progressive multifocal contact lens includes a first optical region of a front optical surface and a second optical region of a back optical surface. The first optical region includes a center zone, an outer zone and an intermediate zone connected between the center zone and outer zone where the center zone and outer zone are selected from a distance vision power and a near vision power and the intermediate zone is configured to adjust the optical power of the distance vision power and the near vision power so that the optical power or add power of the first optical region on the front optical surface forms a normal cumulative distribution function.

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