Hello, about a year ago I went for a routine eye exam and was told that I had swelling in my optic nerves. I was referred to a specialist who ordered a MRI and Spinal Tap however both came back normal . I have no vision issues and do not experience headaches. I recently found out the swelling had gotten worse and am getting a 2nd spinal tap because my Dr. thinks my first reading was incorrect. Any ideas on what could be causing this ??