Floaters are particularly pronounced if you gaze at something particularly bright, such as a piece of white paper or a blue sky. You’ll notice that they move as your eyes move and appear to zoom across your eye as you try to look at them directly.
Floaters are usually just an annoyance that people get used to, but sometimes they can hamper vision and therefore require surgery. This procedure involves removing the vitreous and replacing it with a saline liquid.