Bifocal-/ Trifocal lenses provide presbyopes with clear vision for two or three different ranges, usually for distance, intermediate and near vision.
With a segment in the lower area of the lens, a bifocal or trifocal displays two or three different dioptric powers.
Bifocal spectacle lenses - now true classics - are available in different main materials - e. g. as higher-index glass lenses, as photochromic lenses or as light plastic lenses, and with different segment sizes depending on the visual zone required.
The trifocal lens ZEISS Trifocal Classic S728 1.5 provides the wearer with excellent vision not only for near and far, but also for intermediate distances from approx. 45 cm to 80 cm.