Dry Eye Syndrome is a common disorder of the normal tear film that, unless properly diagnosed and treated, may lead to more serious problems.

Dry Eye Syndrome can have multiple confusing and over-lapping causes that generally fall into one of two main categories: Aqueous Deficient Dry Eye or Evaporative Dry Eye.

The eye depends on the flow of tears to provide constant moisture and lubrication to maintain vision and comfort. Tears are a combination of water, for moisture; oils, for lubrication; mucus, for even spreading; and antibodies and special proteins, for resistance to infection. When there is an imbalance in this tear system, a person may experience dry eyes.

For some, the cause of dry eyes is an imbalance in the composition of their tears called Tear Film Insufficiency or Evaporative Dry Eye. Other people don’t produce enough tears to keep their eyes comfortably lubricated. This is called Aqueous Deficient Dry Eye.

To properly diagnose and treat the underlying cause, it is very important for your eye doctor to be able to accurately differentiate between the two as effective treatments differ considerably. ATD provides your eye doctor with the diagnostic tools necessary to confirm and differentiate the underlying cause of dry eye.