Meaning of “lens” in the English Dictionary

"lens" in American English

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lensnoun [ C ]

us /lenz/

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)