A common saltwater clam, known as a scallop, has 200 eyes.
Each year, three million people have their eye lenses replaced with plastic ones. Artificial lenses are fine, but what if people could regrow their own?
Why are owls such efficient predators? Large eyes and flexible necks.
If you look at a bright lamp and then close your eyes, why can you still see the light?
If you've ever rubbed your eyes and seen faint sparkles of light, you have demonstrated a surprising fact of sensory physiology.
A small crustacean called Daphnia provides evidence that larger eye size yields a reproductive advantage.
Eye movements can cause you to mistakenly perceive isolated objects as moving.
Researchers discover the link between pupil size and the brain's flow state.
REM sleep studies suggest that we "see" during our dream state.
Dung beetles use moonlight's polarization to guide its dung hunts.