mydriasis

English - English

Definition of mydriasis in English English dictionary

The condition of having abnormally large and dilated pupils due to disease or drugs, particularly stimulants such as (meth)amphetamines, cocaine, etc

A long-continued or excessive dilatation of the pupil of the eye

{i} abnormal widening of the pupil of the eye (Medicine)

Dilatation of the pupil

Pupillary dilation

reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs

extreme dilation of the pupil

Dilation of the pupil

Increase in pupil size (dilation) occurring normally in the dark May occur artificially through the use of drugs See Free Eye Tests

Hyphenation

my·dri·a·sis

Antonyms

miosis

Etymology

() From Latin mydriasis, from Ancient Greek μυδρίασις (mydriāsis, “undue enlargement of the pupil”) from μύδρος (mydros, “mass of red hot material in a forge”), possibly because the pupil is particularly bright or sparkling when dilated.