What HOLMES-ADIE SYNDROME means: Holmes-Adie syndrome - (HAS) 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 and constricts slowly in bright light (tonic pupil), along with the absence of deep tendon reflexes, usually in the Achilles tendon. HAS is thought to be the result of a viral or bacterial infection that causes inflammation and damage to neurons in the ciliary ganglion, an area of the brain that controls eye movements, and the spinal ganglion, an area of the brain involved in the response of the autonomic nervous system. HAS begins gradually in one eye, and often progresses to involve the other eye. At first, it may only cause the loss of deep tendon reflexes on one side of the body, but then progress to the other side. The eye and reflex symptoms may not appear at the same time. People with HAS may also sweat excessively, sometimes only on one side of the body.
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