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English definition of “contact lens”

contact lens

noun [C]    
C2 a small round curved piece of transparent plastic, worn on the surface of your eye to improve your sight: I usually wear contact lenses, but I sometimes wear glasses when my eyes are tired.Eyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasers
(Definition of contact lens noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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