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pupillary dilation due to paralysis of the sphincter muscle of the pupil induced by anticholinergic drugs given topically or systemically, or resulting from lesions of the oculomotor nucleus or nerve, contusion of the eyeball, or glaucoma.
Etymology: Gk, paralyein, to be palsied, mydriasis, pupil enlargement
an area of depressed vision that is on the periphery of the field.
Mydriasis resulting from paralysis of the oculomotor nerve.
See also: mydriasis