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A member asked:
What is third eyelid?
4 doctors weighed in across 2 answers
Only in animals: The third eyelid is commonly found in canines ( dogs ). There is no similar strucure in the huma eye.
Answered 7/3/2015
5.8k views
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Not in people: Dogs, cats, horses, and many other animals have them - known as a "nictitating membrane" . Humans do not have this structure.
Answered 6/11/2013
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