Dry eye disease is caused by inadequate lubrication and moisture on the surface of the eye. Symptoms of dry eye disease range from eye irritation, eye heaviness or soreness, light sensitivity, and blurred vision. Dry eye is a CHRONIC and progressive disease (meaning you want to identify symptoms early and begin treatment before it gets worse). According to a 2012 Gallup poll, more than 26 million Americans suffer from dry eyes, and this number is expected to increase to more than 29 million within 10 years.