lens
UK: lenz | US: lenz
n. a curved piece of glass or other transparent material used to focus or disperse light
n. (anatomy) the transparent structure behind the iris of the eye
n. (figurative) a perspective or way of viewing something
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The word "lens" originates from the Latin "lens" (lentil), due to the resemblance of early convex lenses to the shape of a lentil seed. The term was adopted into scientific vocabulary in the 17th century to describe optical devices. Its figurative use (e.g., "view through a different lens") emerged later, extending the concept of focusing or filtering perception.
The camera lens was scratched, affecting the photo quality.
She underwent surgery to replace her eye's natural lens.
Historians analyze events through the lens of social justice.
The telescope uses a powerful lens to magnify distant stars.
Clean the lens gently to avoid leaving smudges.