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Pupil narrowing in opiate users

Miosis means narrowing of the pupil of the human eye . Mediates the sphincter pupillae muscle , innervated by the parasympathetic nerve from the Edinger-Westphal nucleus. It changes the amount of light that hits the retina, increases the depth of field, and facilitates the outflow of aqueous humor into Schlemm's canal.

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  • AMBLER, Zdeněk. Základy neurologie. 6. edition. Galén, 2006. ISBN 80-7262-433-4.