We’re here at the optician’s to get a good look at a human eye and find out how it works. Human eyes ... light around, it shrinks. Lights on again please! Now, the light that goes in through ...

When evolution skeptics want to attack Darwin's theory, they often point to the human ... eyes may have gone through. Here's how some scientists think some eyes may have evolved: The simple light ...

Cameras and eyes both detect light. Both cameras and the human eye use lenses to focus ... Now, light that goes in through the pupil passes through a lens that sits behind it.