A floater is an extra pair of eyes that are found on the inside of the eyeball. floaters can be caused by a variety of things, such as a medical condition, a tumor, or a hereditary disorder. When a floater is found, it is often difficult to determine if it is a result of an eye injury, a disease, or just a little bit of variance in the coloration of your eyeballs. If you notice any floaters, it is important to get them checked out by a doctor, as they may be a sign of a more serious condition.