What causes dry eyes?

Q. I have recently noticed that my eyes are frequently dry. I have used saline eye drops, but they don't seem to help much. Is this normal?

A. Dry eyes is a common condition that affects about 10% of men. Typical symptoms include burning, redness, and the sensation that you have something stuck in your eye. Paradoxically, excessive tearing is another common symptom of dry eyes.

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