two, one to cover the eye to protect it while diving but transparent, the other, almost like ours
How many eye lids does a salt water crocodile have on each eye?
3
Just one.
Four hundred and ninty six
4. Two for each eye. They have normal ones like you and I and they have set that come from the bottom of the eye if they are sick or they see an extremely bright light. if the lids from the bottom are always showing, get your cat to the vet right away.Cats have the usual setup of eyelids on each eye (the main one that moves downward and a second that moves upward), plus the 'third eyelid' common to many animals. You may confused with the myth of cats' lives (the number is either seven or nine, depending on where you are).
Eyelids are accessories of the eye. They are not organs.
they can't.
your eyelids and eyelashes
your eyelids and eyelashes
They have eye lashes.
The frog's eye has a nictitating membrane that covers the eye and allows the frog to see underwater with ease.
eyelids
A Camel has two sets of eyelids. The often used during sandstorms Camels have 3 layers of eyelids to protect them from sandstorms and the sun.
the round part of the eye of a vertebrate, within the eyelids and socket.
The main purpose of eyelids is to moisten the surface of the eye, which in terrestrial vertebrates (like you and I) is nessesary to provide the eye with lubrication to move. Underwater, the eye is lubricated by the water, and kept moist without effort, thus the eyelids are not present because they don't need to be there. Interestingly, although it may seem that eyelids are the norm, the majority of species with eyes don't have eyelids. Insects for example.