So, at the outset, nocturnal eyes gather more light than human eyes do ... with more sensory nerve cells than anywhere else in the body. The retina is home to two different kinds of light receptor ...

When evolution skeptics want to attack Darwin's theory, they often point to the human eye. How could something so complex, they argue, have developed through random mutations and natural selection ...

The muscles that control your eyes are the most active muscles in your body. 4 ... why you can sometimes see stars out of the corner of your eye at night, but when you look straight at them they seem ...

This clip is a look at the human eye and how it works. We illustrate the functions of the eye with models, film clips and magnified images. The eye is a ball with a hole at the front, the pupil ...