I'm not sure but if specifically the third eyelid is showing it is a sign of illness or possibly injury and you should get the cat or dog to the vet.
I timed Miss Kitty for a minute and she didn't blink once. NOT ONCE!
Eye lids protect the eyes. Eyelids also provide moisture for the eyes. The moisture is provided when a person blinks. When a person blinks, the eyes are lubricated with tears.
a fish
they have no eye lids
yes just like cats and humans
Their eyes do not dry out.
They are right above your eyes.
Wasps have compound eyes and no eye lids
When its eyes are bloodshot and his eye lids are droopy?
Their eye lids protects their eyes. Beavers eyes let them to see both underwater and on land.
Yes, cats do blink their eyes. Unlike humans, though, newly born kittens have their eyes closed shut and they can't open them until after 2 or 3 weeks after they were born.supplementary Cats (and birds and amphibians) also have a nictating membrane which temporarily covers and protects the eye.
Eye lids