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English definition of “lens”

lens

noun [C] (EYE)    /lenz/
the part of the eye behind the pupil (= the black hole at the front of the eye) that helps you to see clearly by focusing (= collecting) light onto the retinaThe eye and surrounding areaEyesight, glasses and lensesUsing the eyes
(Definition of lens noun (EYE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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