varifocals
noun/ˈveərɪfəʊklz/
/ˈverɪfəʊklz/
[plural]- a pair of glasses in which each lens varies in how thick it is 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
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varifocals