How Tears Work National Eye Institute

Tears keep your eyes wet and smooth, and they help focus light so you can see clearly. They also protect your eyes from infections and irritating things, like dirt and dust. Find out what tears are made of and how they protect your eyes.

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Dry Eye Disease (Keratoconjunctivitis Sicca): Practice Essentials

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What are Tears Made of?

Vitreous Humor: What Is It, Location, Function, Most Important

What Are Tears Made Of and Why Do We Cry?​

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Parts of the Eye National Eye Institute

DIY Ways to Manage Dry Eye

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How Do Tears Work? Dry Eye Institute of St. Louis