It's hard to imagine your vision working completely different than it does, which is why these illustrations helping people with "normal" vision understand what colorblindness looks like are so fascinating. If you're not...

When humans go out in the dark, it’s just dark, and we have trouble seeing anything. But for night creatures: cats, toads, insects, tarsiers, etc. that’s when they are out hunting, and they must see what they...

C'Sar, an elephant at the North Carolina Zoo, showed signs of not being able to see. The problem was cataracts, which were removed surgically. C'sar perked up amazingly well after his sight was restored, but zookeepers s...

(YouTube link) There's nothing a tortoise likes better than a fresh tomato -just ask any tomato gardener! Kevin is no exception, but he desperately needs a teeny little pair of tortoiseshell glasses. He has terrible...