progressive multifocal ophthalmic lens.

摘要: In a progressive multifocal ophthalmic lens providing excellent performance in the far vision region, good width of near region and gentle progression intermediate therebetween, comprises an angular sector defined by two half-lines that intersect at geometrical center forming upwardly-directed segment with included angle preferably more than 145° which all points have cylinder less A/2 diopters, constraints are applied governing gentleness relative region.