I was the lucky winner of permanent horners syndrome after an unsucesful RFA in the ganglia branch of nerves in the neck . I have the droopiness on the left side of my face and the left pupil stays constricted . I have occasional flares that involve the eye and have been told by my opthomologist that the ganglia branch of nerves is tied in with the eye and my nerve is telling the brain we have a problem even though the eye itself is healthy . During these flares I will have severe pain in the eye and blurred vision , all I can do is wait it out when it comes on . Hope this helps some . Take care !