What is the role of tears?

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Posted by Hritesh Kumar Sahoo 5 years, 5 months ago
- 2 answers
Meghna Thapar 5 years, 5 months ago
Tears prevent dryness by coating the surface of the eye, as well as protecting it from external irritants. There are no blood vessels on the surface of the eye, so oxygen and nutrients are transported to the surface cells by tears. Foreign bodies that enter the eye are washed out by tears.
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Raunak Nayak 5 years, 5 months ago
1Thank You