Progressive ophthalmic lens

US9329406B2 · kind B2 · utility

Assignee

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

Inventors

• Helene De Rossi · Charenton-le-Pont, FR
• Jérôme Moine · Charenton-le-Pont, FR
• Carlos Rego · Charenton-le-Pont, FR
• Matthieu GUILLOT · Charenton-le-Pont, FR

Key dates

• Filing date: Mar 22, 2012
• Grant date: May 3, 2016
• Expiry date: Nov 2, 2032

Classification

• Technology area (CPC —): General

Abstract

Disclosed is a progressive ophthalmic lens including a front surface and a rear surface, each surface having in each point an altitude, a mean sphere value and a cylinder value, the front surface of the lens including: —a far vision zone having a far vision reference point; —a near vision zone having a near vision reference point; —a main meridian, wherein the front surface is regressive and has: —a sphere gradient normalized value of less than 7.50·10−1 mm−1 at any point in a central portion of the lens including a portion of the main meridian (32), the far vision reference point (FV) and the near vision reference point (NV); —a cylinder gradient normalized value of less than 1.45 mm−1 at any point in the central portion of the lens.