Today I experienced a sudden onset vision issue. I suddenly noticed that I had a large pulsating "C" shape in both eyes and where it was located the vision was somewhat impaired. I started to freak out so I immediately went to lay down and found that after about 10 minutes laying on my left side, that it had passed. Now I feel alot of pressure in the back of my skull and feel a bit funny. I am going to lay down for the rest of the day to see if that helps....if anyone has heard or experienced this, please let me know.....I have had a CSF leak for about 6 1/2 years......Christa