/ ˈveərɪfəʊklz; NAmE ˈverɪfoʊklz/ noun
[ pl. ] a pair of glasses in which each lens varies in thickness from the upper part to the lower part. The upper part is for looking at things at a distance, and the lower part is for looking at things that are close to you.
—compare bifocals
► vari·focal adjective
—compare bifocal