The Composition of Tears and Their Role in Eye Health
https://www.verywellhealth.com/what-are-tears-made-of-3421862
WEBJun 16, 2022 · Tears are made of mucus, water, and oil, and each component plays a role in the eye. Mucus coats the surface of the eye and helps bind the tear layer to the eye. Without a healthy mucus layer, dry spots may form on the cornea, the clear, dome-like structure on the front of the eye.
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