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:
Jul. 14, 2020
Filed:
Oct. 11, 2016
Essilor International, Charenton-le-Pont, FR;
Benjamin Rousseau, Charenton le Pont, FR;
Melanie Heslouis, Charenton le Pont, FR;
Sebastien Fricker, Charenton le Pont, FR;
Nacer Lakhchaf, Charenton le Pont, FR;
Guilhem Escalier, Charenton le Pont, FR;
Thierry Bonnin, Charenton le Pont, FR;
Isabelle Poulain, Charenton le Pont, FR;
Valerie Jolivet, Charenton le Pont, FR;
Juliette Wierzbicki, Charenton le Pont, FR;
Essilor International, Charenton-le-Pont, FR;
Abstract
An ophthalmic progressive addition lens for a presbyopic wearer which has a prescribed far vision mean refractive power a non nil prescribed addition, ADD, the lens having a far vision reference point, a mean refractive power, PPO(α, β), a module of resulting astigmatism, ASR(α, β), a meridian line, ML(α, β), the (α, β) functions being determined in as-worn conditions of the lens by the wearer for gaze directions (α, β) joining the center of rotation of the eye, CRE, and the lens, wherein α is a lowering angle in degree and β is an azimuth angle in degree, and wherein α lens criterion, CRIT, fulfils following requirement: 0.38≤CRIT≤4.50, where: CRIT=NumeratorCRIT/DenominatorCRIT, NumeratorCRIT=(A1/A2)+(PPO(α, β)/(100·ADD)); A1=α100%−α85%; A2=α100%−α60%; DenominatorCRIT=[(PeaksMean/ADD)+(PPO(α,β)/(8·ADD))].