For more than a year now, I've been experiencing double vision in my left eye. It seems to occur when I am under stress or exertion; also during sex. It lasts for a long time, usually anywhere between 20-40 minutes, sometimes longer. I have been to an opthamologist, a neurologist, had two mri's and numerous blood tests. My regular doctor seems to be stumped and the neurologist he sent me to hasn't even bothered to "look further". I had to call his office probably a half dozen times to hear, "your mri was normal". I don't know what to do. I am an otherwise healthy, 44 year old female. I also had some sort of carotid artery doppler (sonogram?), as there is a history of stroke in my family. I am very concerned. Help! Any suggestions would be greatly appreciated.