Progressive ophthalmic lens

US5042936A · kind A · utility

Assignee

• Optische Werke G. Rodenstock · DE

Inventors

• Gunther Guilino · Munich, DE
• Herbert Pfeiffer · Munich, DE
• Helmut Altheimer · Munich, DE

Key dates

• Filing date: Jul 14, 1989
• Grant date: Aug 27, 1991
• Expiry date: Jul 14, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/12
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A progressive ophthalmic lens comprising a distance portion, the refractive power of which being designed for distance vision, a reading portion, the refractive power of which being designed for near vision, and an intermediate portion, in which the refractive power along the main line of vision at least partially increases continuously from the refractive power of the distance portion to the reading portion. A refractive index of the lens material varies along the main line of vision at least in the intermediate portion so as to at least partially contribute to the increase in refractive power and correction of aberrations.