Definition of varifocals noun from the Oxford Advanced American Dictionary

 

varifocals

 noun
noun
NAmE//ˈvɛrɪˌfoʊklz//
 
[plural]
 
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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
 
adjective varifocal lenses
See the Oxford Advanced Learner's Dictionary entry: varifocals