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mydriasis |
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mydriasis /my·dri·a·sis/ (mi-dri´ah-sis) [Gr.] dilatation of the pupil.
mydriasis (midrī´ n an abnormal condition of the eye characterized by contraction of the dilator muscle, resulting in widely dilated pupils. mydriasis gross dilatation of the pupil. Common causes in animals are atropine poisoning, hypocalcemia and tiger snake envenomation. Permanent dilatation may be due to damage to the retina, as in toxoplasmosis, or to the optic nerve, as in avitaminosis A. |
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