Method for calculating a spectacle lens with improved near zone

US8992014B2 · kind B2 · utility

Assignee

• RODENSTOCK GMBH · DE

Inventors

• Gregor Esser · Munich, DE
• Wolfgang Becken · Munich, DE
• Helmut Altheimer · Munich, DE
• Andrea Welk · Munich, DE
• Anne Seidemann · Munich, DE
• Edda Wehner · Grafing, DE
• Werner Mueller · Rain, DE
• Dietmar Uttenweiler · Munich, DE

Key dates

• Filing date: Sep 6, 2011
• Grant date: Mar 31, 2015
• Expiry date: Nov 10, 2031

Classification

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

Abstract

Optimization and production of a spectacle lens for a specific wearing situation for correcting at least one astigmatic refraction of an eye of a spectacles wearer, which in a reference viewing direction of the eye has a cylinder reference value and a cylinder reference axis, comprising: specifying an object distance for at least one evaluation point of the spectacle lens; determining a transformed astigmatic refraction for the at least one evaluation point of the spectacle lens from the cylinder reference value and the cylinder reference axis depending on the specified object distance; and optimizing the spectacle lens such that for the at least one evaluation point a correction of the transformed astigmatic refraction by the spectacle lens in the specific wearing situation is taken into consideration, wherein determining the transformed astigmatic refraction comprises determining a transformed cylinder value and/or a transformed cylinder axis depending on the specified object distance.