When evolution skeptics want to attack Darwin's theory, they often point to the human eye ... the separate parts of the eye -- the lens, the retina, the pupil, and so forth -- since none of ...

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 ...

They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than human eyes do. After the light passes through the pupil, it is focused by ...

Do you have blue eyes? We talked to experts to discover curious facts about baby blues, including whether your biological family is bigger than you ever imagined.

It is likely that many of the human beings who inhabit the planet have never considered the physical circumstances that differentiate us from other living beings that walk the eart ...

They're often described as the 'windows to the soul'. But a new study suggests that our eyes can convey more about us than we previously thought. Researchers from Leiden University have revealed ...

Pupillometry measures the size and reactivity of the pupil, the dark circle at the eye’s centre through which light enters. Typically, the pupil contracts and dilates depending on the amount of ...

Few people have spent time gazing into a sheep’s eyes, but if you have, you may have noticed something very strange about their pupils. Instead of being round, as is the case with humans ...

Where are the fastest and most active muscles in the human body ... the cornea, the pupil, and the sclera, are all working together to allow us to see. The eye muscles have to be fast.