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Do dogs have three eyelids?

+1 vote
Is it true that dogs have not one but three eyelids? and if so, why?
asked Jun 19, 2013 in Dog Health by (1,180 points)

1 Answer

0 votes
Yes, dogs have a third eyelid which gives the eye extra protection. Underneath the eyelid is a piece of cartilage which clears debris from the cornea, much like a window washer. Tissue secretions from the third eyelid help fight infection. The third eyelid's gland also produces tear film, bathing the eye. While humans and pigs don't have a third eyelid, many animals do.
answered Jun 20, 2013 by (36,420 points)