Single vision ophthalmic lens

US8579436B2 · kind B2 · utility

Assignee

• Essilor International (Compagnie Generale d'Optique) · FR

Inventors

• Laurent Calixte · Charenton-le-Pont, FR
• Cyril Guilloux · Charenton-le-Pont, FR
• Isabelle Poulain · Charenton-le-Pont, FR

Key dates

• Filing date: May 20, 2010
• Grant date: Nov 12, 2013
• Expiry date: Jun 27, 2030

Classification

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

Abstract

An ophthalmic lens including: a prescription control point (P); an upper area having, relative to the point (P), and average-power continuous variation ΔPuiSup that is monotonous between the point (P) and the point (Psup) (maximum variation point in absolute value) where the signed value of the variation ΔPuiSupMax=Pui(Psup)−Pui(P) is between −0.1 and −0.4 dioptres; a lower area having, relative to the point (P), an average power continuous variation ΔPuinf that is monotonous between the point (P) and the point (Pinf) (maximum variation point in absolute value) where the signed value of the variation ΔPuiinfMax=Pui(Pinf)−Pui(P) is between +0.1 and +0.4 dioptres; the average power gradient being lower than 4.10−2×ΔPuitotal, where ΔPuitotal=|ΔPuisupMax|+ΔPuiInfMax. Such a lens advantageously takes the accommodative dynamics of the eye into account and increases the visual comfort of the wearer.