Invention Grant
- Patent Title: Ophthalmic progressive addition lens for a myopic or emmetropic presbyopic wearer; method for providing such a lens
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Application No.: US15767814Application Date: 2016-10-11
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Publication No.: US10690938B2Publication Date: 2020-06-23
- Inventor: Benjamin Rousseau , Melanie Heslouis , Sebastien Fricker , Nacer Lakhchaf , Guilhem Escalier , Thierry Bonnin , Isabelle Poulain , Valerie Jolivet , Juliette Wierzbicki
- Applicant: Essilor International
- Applicant Address: FR Charenton-le-Pont
- Assignee: Essilor International
- Current Assignee: Essilor International
- Current Assignee Address: FR Charenton-le-Pont
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@79669f2d com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@11d6f335 com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@5ea296fa com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@58cceaf7
- International Application: PCT/EP2016/074304 WO 20161011
- International Announcement: WO2017/064041 WO 20170420
- Main IPC: G02C7/02
- IPC: G02C7/02 ; G02C7/06 ; A61F2/14 ; G02C7/04

Abstract:
An ophthalmic progressive addition lens for a myopic or emmetropic presbyopic wearer which has a prescribed far vision mean refractive power and a non nil prescribed addition, ADDp, 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 a lens criterion, A1/A2, fulfils: A1/A2≥0.50, wherein: A1=α100%−α85%; A2=α100%−α60%.
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