PROGRESSIVE SPECTACLE LENS FOR SEEING OBJECTS AT A LARGE OR AVERAGE DISTANCE

摘要

The invention relates to a spectacle lens whose power is adapted in a first viewing zone for seeing into the distance when the glasses are being used; and whose power is adapted in a second viewing zone for seeing into average distances i.e. distances of one metre or more when said glasses are being used. The power of the lens increases in a continuous manner from the first viewing zone to the second viewing zone in a straight or winding main line. The inventive spectacle lens comprises the following characteristics; the power thereof not only increases in a continuous manner from the first viewing zone to the second viewing zone but also beyond the second viewing zone as far as the lower edge of the lens; the clearer viewing zone i.e. the zone wherein the remaining astigmatism of the lens/eye system does not exceed 0.5 dpt, becomes narrower in a funnel-like manner, i.e. without contraction, below the first viewing zone towards the lower edge of the spectacle lens.