to protect frm foreign bodies
By covering the eyeball.
If you squish your eyeball, tears and blood will come out.
no they dont have eyelids
Tears come from the lachrymal glands, located under your upper eyelids.
Yes
Conjunctivitis is usually caused by viral infection.
The eyelids of all snakes are non-existent ! Instead, they have a clear scale (the 'brille') which covers the eyeball. Each time a snake sheds, this covering is replaced.
Adnexa of the Eyes
they dont have eyelids
Whales and sharks dont have eyelids because instead they metmorphisize
Orbital exenteration refers to the removal of the entire eyeball, orbital soft tissues, and some or all of the eyelids.
Shark