A light show like Hedi said I get that, Dr. called them floaters when I asked him when Marie was being checked out before her stroke. He told me as long as they don't last more than fifteen minutes or so, that I would be fine and that he gets them too. But mine last forty-five minutes to an hour, sometimes which he said could be a problem. I also see those black dots moving sometimes. He also said it's silent migraines. Driving can be a problem while it's happening. We should take time to find out why, but always put it off till gets worse.