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 ...

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 ...

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 ...

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 ...

WE have shown 1 that the impression of brightness produced by a light ray which forms an image on a fixed area of the retina depends in high degree on the position of entry of the ray in the eye ...

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.

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.

It might just be that they have smaller pupils and larger irises ... sought to determine which physical attributes of the ...