Contact lenses bring objects into closer and clearer focus than glasses.
Parents' line of vision is eye-catching to infants.
Is drinking yourself 'blind' just an exaggeration, like 'eating till you burst'? Or can alcohol really turn out the lights?
Mate selection is tricky business. Here's how one amphibian merges two senses to narrow down its options.
Rats have a strikingly different visual system than our own, one that is carefully attuned to their unique needs.
The box jelly has evolved a central nervous system unlike any other animal on Earth.
Vision may not involve creating an inner model of the world in the brain.
Have you ever been staring into space, or gazing up at a clear, blue sky and suddenly noticed clusters of tiny dots and swirls?
Why are letters reversed in a mirror? Try this experiment with pen and paper.
Research shows that marksmen shoot most accurately when their hearts' rhythm increases from eight to twenty beats per minute over their resting heart rate.