What are natural tears?
The symptoms of dry eye are caused by a reduction in your eye´s ability to produce sufficient natural tears. Tears are a lot more complicated than they seem. They are the body’s natural mechanism for protecting the surface of the eye from infection and from the corrosive effects of dirt, dust and other airborne particles. They create a smooth corneal surface so vision stays clear and undistorted and your eyes stay comfortable. Tears provide a wet, lubricated surface that sits atop the corneal epithelium (surface of the eye) and protects the cornea from drying. If the cornea dries it can potentially become damaged. There are three layers to the tear film. The oily, outer layer prevents evaporation. The middle layer is more watery. The inner layer contains mucous and forms the bond between the tear film and the corneal epithelium. Tears are constantly being replenished, so adequate tear production is important to maintain the health, comfort and infection-fighting capabilities of the eye
