How do a snake's eyes work?

Answer by  cady (194)

A snake's eyes have light receptors consisting of a combination of rods and cones, much like a human's eyes. Snakes are colorblind, but some have excellent vision.

Answer by  kathryn26 (96)

The snake's eyes work by seeing the radiant heat emitted by the forms around them. Warm-blooded animals, like our beautiful little cousins in fur and feathers, give off more radiation than our cold-blooded cousins and living things(plant life). The snake actually sees the brightness given off by the forms around them,so warm-blooded animals actually appear "brighter" than other life forms.