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Pupil

Medical term · P

The dark, circular opening in the middle of the iris of the eye.

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Related terms

Iris

The colored ring in front of the lens that controls the size of the pupil and how much light enters the eye.
Miotic

An eye drop that constricts the pupil; used to treat glaucoma.
Mydriatic

A type of drug that widens the pupil.
Zonules

Thin, gelatinous ligaments that attach the lens to the ciliary body and support the lens centrally behind the pupil.

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