The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2019
Filed:
Apr. 20, 2018
Applicant:
Coopervision International Holding Company, Lp, St. Michael, BB;
Inventors:
Daozhi Wang, Dublin, CA (US);
Laura Horan, Constance, DE;
Assignee:
CooperVision International Holding Company, LP, St. Michael, BB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C 7/04 (2006.01); G01M 11/02 (2006.01);
U.S. Cl.
CPC ...
G02C 7/044 (2013.01); G01M 11/0235 (2013.01); G02C 7/04 (2013.01); G02C 7/041 (2013.01); G02C 2202/22 (2013.01);
Abstract
A contact lens has a central region and an annular region surrounding the central region, the central region having a first optical power and the annular region having a second optical power. In a method of measuring the add power, the wavefront aberration of the contact lens is measured; a polynomial is fitted to the measured wavefront aberration. Terms of the polynomial correspond to types of aberration comprising defocus and astigmatism and residual aberrations. The add power is calculated as a defocus corresponding to the residual aberrations.