Miosis: Definition Miosis is a

Miosis Definition Miosis is a medical term referring to the constriction of the pupil. Miosis is also known as myosis. Both terms refer to the closing of the pupil through the actions of small muscles in the eye. Miosis reduces the amount of light that enters the eye, which is necessary in daily life as the levels of light change in an organism’s environment. Miosis can also be induced by a wide variety of medicinal and recreational drugs, and is sometimes one of the diagnosing criteria ... Miosis is a condition where the pupils are abnormally small, even in darkened conditions. It can be caused by trauma, infection, medication, or neurological problems. Learn how to recognize the signs and symptoms of miosis and when to seek medical help. When your pupil shrinks (constricts), it's called miosis. If your pupils stay small even in dim light, it can be a sign that things in your eye aren't working the way they should. Miosis is the excessive constriction of your pupil, which can be a sign of various diseases or conditions affecting your brain or nervous system. Learn about the possible causes, symptoms, diagnosis, and treatment of miosis, and when to see a doctor.