Ophthalmic progressive addition lens for a farsighted and presbyopic wearer; method for providing such a lens

US11067830B2 · kind B2 · utility

Assignee

• Essilor International · FR

Inventors

• Melanie Heslouis · Charenton-le-Pont, FR
• Benjamin Rousseau · Somerville, US
• Sébastien FRICKER · Charenton-le-Pont, FR

Key dates

• Filing date: Oct 11, 2016
• Grant date: Jul 20, 2021
• Expiry date: Feb 13, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/066
• WIPO field: Optics
• WIPO sector: Instruments

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).