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English definition of “lens”

lens

noun [C]  /lenz/ us  

lens noun [C] (GLASS)

a piece of glass or plastic having a curved surface in order to change the images that are received after going through it, usually to make them larger, smaller, or clearer: a camera lens Her eyeglasses have thick lenses.

lens noun [C] (EYE)

a curved, transparent part of the eye that helps you to see clearly by directing images of light onto the retina (= the back surface of the eye)
(Definition of lens from the Cambridge Academic Content Dictionary © Cambridge University Press)
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