Progressive ophthalmic lens

US6213603A · kind A · utility

Assignee

• Optische Werke G. Rodenstock · DE

Inventors

• Helmut Altheimer · Munich, DE
• Gregor Esser · Munich, DE
• Herbert Pfeiffer · Munich, DE
• Rudolf Barth · Hohenkirchen, DE
• Monika Fuess · Munich, DE
• Walter Haimerl · Munich, DE

Key dates

• Filing date: Aug 9, 1999
• Grant date: Apr 10, 2001
• Expiry date: Aug 9, 2019

Classification

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

Abstract

A progressive ophthalmic lens including at least one distant vision zone in which the power is suitable for distant viewing, at least one near vision zone in which the power is suitable for near viewing, and at least one progression zone in which the power varies continuously from the power of the distant vision zone to the power of the near vision zone along a principal line, at least one surface of the ophthalmic lens contributing to the power variation. A surface astigmatism of the at least one of surface of the ophthalmic lens contributing to the power variation along at least one horizontal intersection, represented by an intersection of the ophthalmic lens and a horizontal plane where y=const, has a local maximum value located at a distance of not more than 4 mm from the principal line, and at least one local minimum value which does not lie on the principal line and is located at a greater distance from the principal line than the local maximum value.