Did you ever wonder why the eye is covered by tears?

It's because the delicate living tissue in the surface of your eye has no blood supply-it has a tear supply instead. So rather than getting important things like oxygen and electrolytes from the blood, your eye surface gets them from the watery layer of your tears.

What Happens In Dry Eye? (grapic may take a minute or so to load)
In dry eye, the tear film on the eye surface loses water because of either decreased tear production or increased evaporation. As the evaporation continues throughout the day, your eyes feel drier and drier.


What Causes Dry Eye?
The most common cause of dry eye is aging. As we get older, we produce fewer tears and evaporation increases. Other common causes include eye surgery, contact lens wear, sun, wind dry air, reading, computer use and certain medications. Dry eye is seen with certain diseases such as Sjögen's syndrome as well.


Soothing Relief That Really Works
Do you remember why the eye surface has a tear film? It needs tears as a source of oxygen and electrolytes. TheraTears is unique in containing a patented electrolyte balance that matches the human tear film. They feel as comfortable as natural healthy tears. TheraTears really works because it both lubricates and moisturizes dry, irritated eyes providing cumulative long-lasting dry-eye relief.

History of Theratears

In 1976, Dr. Gilbard began his research with the goal of developing an effective solution for dry eye patients.

The TheraTears formula was developed based on 18 years of research in the clinics and laboratories of the Schepens Eye Research Institute.

What is Dry Eye?

Chronic Eye Irritation
Sandy-gritty irritation or burning in the eyes
Two general causes - decreased tear production or increased tear evaporation.
Tear production can go down from conditions such as rheumatoid arthritis or Sjogren's syndrome, or from any condition that decreases sensation on the surface of the eye—for example: long-term contact lens wear, corneal surgery, LASIK and certain viruses.
Evaporation can increase from long-standing eyelid inflammation or blepharitis, from simply having large eyes or from thyroid eye disease.

Increased Tear Film Osmolarity

Loss of water from the tear film leads to increased tear film osmolarity. The tears become more concentrated.

Physiological Changes in Dry Eye

Decreased Goblet Cell Density:
Goblet cells are mucous-producing cells on the eye surface that provide natural lubrication.
These cells are reduced in dry eye.

Decreased Corneal Glycogen:
Corneal glycogen is the energy source for corneal healing.
Corneal glycogen is reduced in dry eye.