Scientists are shedding light on why threading a needle can be such a challenge, even if you do have good eyesight and a steady hand.
NBC sportscaster Bob Costas is suffering from this uncomfortable condition.
Have you ever seen something pass through your field of vision? Or maybe you see spots when you close your eyes. Trace explains what those eye 'floaters' are and if you should be concerned when you see them.
New research shows that while the blind can't see, their brains can! Anthony explains what this means and how this ability actually plays an important role in a blind person's everyday life.
A California doctor says he has perfected a surgery that would irreversibly turn brown eyes blue. But is it safe?
Scientists believe a quirk in our visual processing is responsible for the curveball's challenge.