Do you have blue eyes? We talked to experts to discover curious facts about baby blues, including whether your biological ...

You can see the iris in action when it squeezes or relaxes to let in more or less light through the pupil. The iris is made up of two layers. For almost everyone - even people with blue eyes - the ...

By keeping the bulb in the center and orbiting the blue gel (for the iris) and the opaque disk (for the pupil) around the bulb, the eye can appear to gaze in different directions. By adjusting the ...