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n. Prolonged abnormal dilatation of the pupil of the eye caused by disease or a drug.

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

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

n. In medicine, a morbid dilatation of the pupil of the eye.

n. Hydrophthalmia.

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

"OMS302, one of Omeros' proprietary PharmacoSurgery™ products, is added to standard irrigation solution used during cataract and other lens replacement surgery to maintain intraoperative mydriasis pupil dilation and reduce postoperative pain and inflammation."

miosis   

reflex action    reflex response    physiological reaction    dilatation    instinctive reflex