Human eyes are actually spheres. The part that we can see is only just the front. That coloured circle is called the iris and the black spot in the middle is the pupil. This is the part of the eye ...

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

The intricacy and seeming perfection of the eye, both as an object of anatomical beauty and as a working machine, have worried and intrigued scientists, philosophers and zealots, especially during ...

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

Located in the vibrant realm of the human eye, the iris, famed for its colour and role in controlling pupil size, ...