When I woke up 2 days ago I noticed a bright, flashy spot on my right vision, a little bit above the center. I can't see anything through it. If I close my left eye and look at a monitor, I can position the mouse in a place where I don't see it at all. Went to emergency, performed a retinal mapping and other eye exams and found nothing unusual. The bright glow went away, but I still can't see anything on that spot. It didn't move, grow nor shrink. I had similar spots before, but none lasted >1h.