01/04/2026
Mydriasis is the dilation of the pupils, creating a soft, “doe-eyed” appearance that reflects sympathetic nervous system activity. In iridology, pupil patterns can offer insight into nervous system balance and temperament, often associated with warmth, generosity, enthusiasm, and approachability.
Pupil size also shifts with age: children more commonly show dilation with a tendency toward nearsightedness, while aging brings gradual constriction (miosis) and farsightedness. Pupil response is regulated by light through the oculomotor nerve.
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