Cats are full of little mysteries that make them perpetually fascinating to us, and one of the most interesting things about ...

Cats pupils change shape drastically, froma tiny slit to a diamond. So different from us, we just expand or contract uniformly around the entire circle.<P>What amazes me are cat's huge range of ...

(via TEDEd) Peering into the eyes of different animals, you’ll see some extraordinarily shaped pupils. House cats, for one, are twilight hunters with vertically elongated pupils. Many grazing animals, ...

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Cats have vertical slit pupils that expand dramatically. This helps them judge distance perfectly while hunting, especially in low-light conditions like dusk or dawn. Octopuses have bizarre W-shaped ...

Tigers have round pupils, but domestic cats have vertical slits in the center of their eyes. What gives? A census of the shapes of animals' pupils... Take a close look at a house cat's eyes and you'll ...

Q: My elderly cat’s pupils seem to stay dilated, even in bright light. Why? A: In old cats, dilated pupils are often just a sign of a harmless condition called iris atrophy. However, if your cat has ...