For those who haven't seen the following report, I'll include a few quotes. I'm leaving in some typos which showed up in this abstract.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=613531&dopt=Abstract
<<Adie's syndrome is a disease of unknown etiology. We known where the damage is, and which nerves are involved.... we don't known what causes the primary injury.>>
<<1. Not all "tonic pupils" are due to "Adie's syndrome"; some are due to local injury and some to a generalized peripheral neuropathy ... All patients should have serologic tests for shyphilis. In this series one in six had positive serology.>>
<<Only 10% of patients with Adie's syndrome had completely normal muscle stretch reflexes... The muscle stretch reflexes in the arms were just as frequently imparied as those in the legs, but the degree of impariment tended to be more severe in the ankles and triceps.>>