What is Dry Eye?
Some people do not produce enough tears or the appropriate quality of tears to keep the eye healthy and comfortable. This is known as dry eye. Tears are produced by two different methods. One method produces tears at a slow, steady rate and is responsible for normal eye lubrication. The other method produces large quantities of tears in response to eye irritation or emotions. Tears that lubricate are constantly replaced by a healthy eye. Excessive tearing occurs when the eye is irritated by a foreign body, dryness or when a person cries.