Progressive spectacle lens having only a small change of binocular properties during a movement of glance

US6776487B2 · kind B2 · utility

Assignee

• RODENSTOCK GMBH · DE

Inventors

• Walter Haimerl · Munich, DE
• Herbert Pfeiffer · Munich, DE
• Gregor Esser · Munich, DE
• Helmut Altheimer · Munich, DE
• Andrea Welk · Munich, DE
• Peter Baumbach · Hersbruck, DE
• Rainer Dorsch · Reutlingen, DE

Key dates

• Filing date: Oct 28, 2002
• Grant date: Aug 17, 2004
• Expiry date: Oct 28, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/22
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A spectacle lens comprises a region (distance portion) designed for viewing at large distances and in particular “to infinity”; a region (near portion) designed for viewing at short distances and in particular “reading distances”; and a progressive zone disposed between the distance portion and the near portion, in which a power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at a near reference point located in the near portion along a curve (principal line) veering towards a nose. The invention is distinct in that, for minimizing a change of binocular imaging properties with horizontal movements of glance, a lift (difference between a maximum and a minimum value occurring during a movement) of binocular imaging properties when a moving object is being followed, is smaller than a physiologically pre-determined limiting amount.