Invention Grant
- Patent Title: Ophthalmic progressive addition lens for a farsighted and presbyopic wearer; method for providing such a lens
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Application No.: US15768060Application Date: 2016-10-11
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Publication No.: US11067830B2Publication Date: 2021-07-20
- Inventor: Melanie Heslouis , Benjamin Rousseau , Sebastien Fricker
- 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: EP15306647 20151015,EP15306891 20151127
- International Application: PCT/EP2016/074296 WO 20161011
- International Announcement: WO2017/064037 WO 20170420
- Main IPC: G02C7/00
- IPC: G02C7/00 ; G02C7/02 ; G02C3/00 ; G02C7/06

Abstract:
An ophthalmic progressive addition lens for a farsighted and presbyopic wearer having a mean refractive power, PPO(α, β), a module of resulting astigmatism, ASR(α, β), an acuity loss value ACU(α, β), wherein the (α, β) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion1≥44 D2.deg, and wherein: AcuityCriterion1 is defined as a combination of PPO(α, β), ASR(α, β), ADDp, and ACU(α, β).
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