Definition of Anisocoria

Reviewed on 3/29/2021

Anisocoria: A condition in which the left and right pupils of the eyes are not of equal size. The size of the pupil determines how much light is let into the eye. With anisocoria, the larger pupil lets more light enter the eye. There are many causes of anisocoria, including eye injury or infection and swelling within the brain.

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