Progressive spectacle lens for seeing objects at a large or average distance

US7033022B2 · kind B2 · utility

Assignee

• RODENSTOCK GMBH · DE

Inventors

• Rainer Dorsch · Reutlingen, DE
• Walter Haimerl · Munich, DE

Key dates

• Filing date: Nov 28, 2001
• Grant date: Apr 25, 2006
• Expiry date: Jan 24, 2022

Classification

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

Abstract

A spectacle lens having in a first see-through region a power suitable for distant viewing in a wearing position, and in a second see-through region a power suitable for medium-distance viewing, i.e. for distances of about 1 meter and more, in a wearing position, and in which the power continuously increases from the first see-through region along a plane or winding principal line to the second see-through region. The spectacle lens has the following features: the power increases not only from the first see-through region to the second see-through region, but also continuously to beyond the second see-through region to a lower edge of the spectacle lens; and a region of clear vision, i.e. a region in which a residual astigmatism of a system spectacle-lens/eye does not exceed 0.5 dpt, narrows below the first see-through region towards the lower edge of the spectacle lens to have a funnel-shaped configuration, i.e. without any constriction.