Eye Floaters Floaters can look like tiny specks in your vision. They may look like black or gray spots, thin threads or spider webs. They may move around when you move your eyes. Floaters disappear when you try to look directly at them. Although they are often harmless, they can sometimes indicate a serious eye condition. Most floaters are caused by age-related changes that cause the jelly-like substance (vitreous) inside your eyes to liquefy and shrink. Stray clumps of collagen fibers build up within the vitreous and can cast tiny shadows on your retina. Causes of Eye floater Age -Related Changes As you age, the gel-like substance inside your eye shrinks and becomes more fluid, forming clumps or fibers that cast shadows on the retina (the light-sensitive tissue at the back of the eye). Eye Injuries or Inflammation Trauma or conditions like uveitis (inflammation of the eye) can cause floaters. Bleeding in the Eye Diabetes, hypertension, or blocked blood ves...