What is the function of third eyelid in human beings?

Related questions

1. Is there a cure for third nerve palsy?
2. Can nerve palsy be cured?
3. What is 4th nerve palsy?
4. What causes eye palsy?
5. Do humans have 2 eyelids?
6. Why are foreheads called foreheads?
7. How do you test vagus nerve?
8. Do humans have a third eyelid?
9. Which cranial nerve is responsible for closing the eyes?
10. How do you test optic nerve?

Tags

1. #nictitating
2. #which
3. #structure
4. #likeness
5. #plica
6. #gorillas
7. #vestige
8. #still
9. #might
10. #third
11. #inner
12. #other
13. #animals
14. #human
15. #including
16. #eyelid
17. #corner
18. #semilunaris
19. #membrane
20. #conjunctiva
21. #primates