Method for determining at least one optical design parameter for a progressive ophthalmic lens

US9841615B2 · kind B2 · utility

Assignee

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

Inventors

• Konogan Baranton · Charenton-le-Pont, FR
• Thierry Bonnin · Charenton-le-Pont, FR
• Juliette Wierzbicki · Charenton-le-Pont, FR
• Ahmed Haddadi · Charenton-le-Pont, FR
• Sarah Marie · Charenton-le-Pont, FR
• Björn Drobe · Singapore, SG

Key dates

• Filing date: Oct 28, 2014
• Grant date: Dec 12, 2017
• Expiry date: Oct 28, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/061
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A method for determining at least one optical design parameter for a progressive ophthalmic lens intended to be fitted in a frame of a wearer, depending on the wearer's visual behaviour, includes: a) placing the wearer in a situation in which he carries out a visual task at a first working distance; b) during this task, determining at least two gaze directions of the wearer at this first working distance in a frame of reference of the wearer's head; c) determining a relative position of a surface related to the frame or to an ophthalmic lens intended to be fitted in the frame; d) determining for each gaze direction at the first working distance the intersection between this gaze direction and the surface so as to establish a map of these points of intersection on this surface; and e) deducing the sought-after optical design parameter from this map.