Had a ‘retinal migraine’ last night, an unnerving experience. I was reading subtitles on TV when they started to go blurry, then the edge of my vision started to sparkle and look jagged, hard to explain, so I’ve tried to draw it. Apparently according to my optician it’s not unusual, I should have covered one eye then the other. If it happens in both it’s an effect in my brain. It cleared up after 20 mins. (if just in one eye, then it may be a problem in one of my eyes).