BARRAQUER, BARCELONA, ISM / SCIENCE PHOTO LIBRARY BARRAQUER, BARCELONA, ISM / SCIENCE PHOTO LIBRARY
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Myosis. Close-up of the left eye of a patient with a tight contraction of the iris, a condition know as myosis (or miosis). The iris is the coloured muscular ring that regulates the amount of light that enters the eye through the pupil (black).
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