What is Tears?
Tears are one of the body’s natural defence mechanisms. They are produced by various glands in the eye and are secreted to coat, protect and nourish the surface of your eye. Tears carry essential vitamins and nutrients across the surface of the eye. They also act as a shield against damaging factors such as wind, heat, smog or foreign particles. Normally, every time you blink, you add another protective coating of tears over the eyes whilst flushing out old tears.