I have been experiencing headaches and dizziness over the past weeks. I also discovered that my pupils were different sizes with variable see-saw aniscoria (alternates eyes and occasionally same size). I was seen by an opthamologist who measured 1mm difference in my pupils and referred me to a neuro-opthamologist. I was evaluated by a neuro-opthamologist and the day I saw him my eyes were normal with no difference in pupil size. I was told that I had physiologic aniscoria and no further evaluation was neccessary. In light of my other symptoms, I am still going to get a CAT scan. I am concerned, however, because I have a defibrillator and am unable to have MRIs. It is my understanding that the CAT scan can not pick up certain things and I am concernd about a tumor being missed because I can not obtain an MRI. Can you please comment on the differences between a CAT scan and an MRI and how concerned I should be about not being able to obtain an MRI? Can you suggest the best way to proceed with getting a diagnosis given the complications of having a defibrillator?
Thank in advance,