What is Dry Eye? What causes dry eye?
The tears are a salt solution. As an eye becomes dry, the tears lose water and become too salty. And just like when you throw salt on a wound, it stings and burns when your tears become too salty, your eyes sting and burn, and later there is a sensation of dryness and sandy-gritty irritation.
Dry eye is a condition characterized by loss of water from the tear film. As a result the tear film becomes saltier and more concentrated. Most of us will...