Eye floaters are small, squiggly lines or dark specks that move as if floating in your vision. They are caused by clumps of cell debris or microscopic protein fibers that drift around in the fluid that fills the back of your eye. When light enters the eye, these clumps can cast a small shadow on your retina, and this shadow is what you see as floaters.
Review Date 12/9/2021
Updated by: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.