I was going to bed, it was like 12 at night and the room was dimly lit. All of the sudden I see these sparkles around the room, except when I look straight ahead there seems to be no sparkles in the vantage point/center of my vision. They would kind of drift like floaters do but they weren't anything like floaters because they were not transparent. These sparkles were white slightly glowy but they were shapes of slim short rectangles. they seem to slightly animate too. They disappeared after 20 seconds or less. I also have really good vision too! What could it be?