I just found out a week ago that I have an arachnoid cyst. It was discovered due to an MRI looking for MS. I have had extreme pressure behind my left eye causing me to loose most of my side vision in this eye. Other symptoms have been dizziness, off balance, sensitivity to light and sound. I have an appointment with a neurosurgeon in about a week. I want to be prepared and know what to expect going in (at least the best I can). Most of what I have read online has been so contradicting or from years ago and I know the medical field is always advancing. I am extremely worried and don't want to worry if it is not needed. Thank you any information would be greatly appreciated.