How do I deal with dry eyes?
user
When you have dry eyes, they’re probably irritated by the natural substances in tears.  It’s hard to avoid these irritants, since tears are constantly being made in our eyes.  One way to help is to apply a tear substitute.  Artificial tears provide the same substance your natural tears would make, but without the natural irritants.
assistant
How do I deal with dry eyes?
user
I think the symptoms you’re describing are probably dry eye syndrome.  It’s common, especially for people over 50. It can be associated with many different conditions, including allergies, medications, arthritis, and autoimmune diseases.  In most cases it’s not dangerous, and the only treatment is “mechanical” (i.e. artificial), rather than “biological” (i.e. natural).
assistant
How do I deal with dry eyes?