Progressive spectacles lens with at least one distance vision zone - has local maximum for surface astigmatism located preferably 2 mm from main line, and local minimum located further from main line

摘要

The at least one progression zone has its power continuously altering along a sinuous line (main line HL) from that of the distance vision zone to that of the close vision zone. At least one surface lens contributes to the power alteration. The amount of the surface astigmatism of at least one surface contributing to the power alteration along at least one section of the spectacles lens with a horizontal plane (y = const. i.f. horizontal section) has a local maximum, which has a preferable distance of 2 mm from the main line, and at least one local minimum, which does not lie on the main line. The distance of the local minimum from the main line is greater than that of the local maximum.