I think this is what I had last Friday and again on Sunday. It scared me because I thought I could be having a stroke.
Both eyes got burry and I started seeing zigzag, very fine patterns that looked like pixels on a phone... looked like neon. I could see them with my eyes open or closed. I could hardy see. It looked like I was wearing swimming goggles that were half full of water.
Lasted about ten minutes both times and no headache after. Well, maybe a mild headache.