Dry eye is a common condition that occurs when your eyes are unable to properly lubricate the surface of your eyes. It is a condition that is comprised of many different factors and there are a variety of symptoms which you may experience. With all of its different factors though dry eye can be divided into two main classifications: either your eyes don’t product the right quality of tears (evaporative dry eye) or they don’t product the right quantity of tears (aqueous deficient dry eye). The two are not mutually exclusive and you could have one, the other or a combination of both. For more information on dry eye disease visit the What is dry eye page.