Discover 10 fascinating facts about the human eye, from its incredible processing power to unique features, unveiling secrets ...

“Brighter irises and larger pupils elicited greater donations,” noted experts from the Netherlands’ Leiden University in a ...

That coloured circle is called the iris and the black spot in the middle is the pupil. This is the part of the eye that lets the light in. Lights out please! When it’s dark, muscles in the iris ...

The uvea is made up of a layer of blood vessels, a muscular ring that surrounds your pupil, and the iris, the colored part of your eye. Together, they help your eyes focus so you can clearly see ...

Study shows pupil size and iris brightness affect how others perceive your attractiveness, friendliness, and generosity.