Mydriasis

Mydriasis is the enlargement or dilation of the pupil beyond its normal physiological dimensions for a given level of ambient light Affecting the ocular and autonomic nervous systems, it can occur pathologically across all age groups or be intentionally induced in ophthalmic settings to facilitate diagnostic fundoscopic examinations and intraocular surgical procedures Pathophysiologically, the state arises either from overstimulation of the sympathetic nervous system acting on the iris dilator p...

Mydriasis is the enlargement or dilation of the pupil beyond its normal physiological dimensions for a given level of ambient light Its defining clinical manifestation is a sustained, widened pupil that demonstrates poor, sluggish, or absent constriction in response to direct light or near-fixation stimuli

Affecting the ocular and autonomic nervous systems, it can occur pathologically across all age groups or be intentionally induced in ophthalmic settings to facilitate diagnostic fundoscopic examinations and intraocular surgical procedures

Pathophysiologically, the state arises either from overstimulation of the sympathetic nervous system acting on the iris dilator pupillae muscle or from inhibition of parasympathetic cholinergic tone governing the iris sphincter pupillae muscle

Its defining clinical manifestation is a sustained, widened pupil that demonstrates poor, sluggish, or absent constriction in response to direct light or near-fixation stimuli