Adie Syndrome

Adie syndrome is is a neurological disorder affecting the pupil of the eye and the autonomic nervous system. It is characterized by one eye with a pupil that is larger than normal that constricts slowly in bright light (tonic pupil), along with the absence of deep tendon reflexes, usually in the Achilles tendon. In most cases, the cause of Adie syndrome is unknown. Some cases may result from trauma, surgery, lack of blood flow, or infection. Treatment may not be necessary. Glasses and eye drops may help when treatmend is needed.

The term Adie syndrome is used when both the pupil and deep tendon reflexes are affected. When only the pupil is affected, the disorder may be referred to as Adie's pupil.