When the production of natural, healthy tears is reduced, Dry Eye can cause serious irritation to the front of the eye, particularly the cornea. A natural, healthy tear film not only lubricates the surface of the eye, but also works to fight infection, providing important nourishment that is vital for clear vision. Increased risk of infection and serious visual impairment may result in cases where a severe dry eye condition has gone untreated over time. Reduced tear production over a long period of time increases the risk of permanent damage and scarring to the front of the eye.