There are many eye diseases in the world but the most common eye disease is Dry Eye Syndrome.
Dry Eye Syndrome Definition
This disease is more common in Women than in men.
A thin layer of tears help to keep Eye and vision comfortable. This layer of tears is made up of 3 layers:
The inner most layer is the thinnest and it is a layer of Mucus. Mucus helps keep a watery layer over the Eye.
The middle layer is thick. This layer is a Salt-Water solution. This layer keeps the Eye moist, comfortable; it also drains out the Dust in the Eye.
The upper layer is a thin layer of Lipids. Lipids consist of fats and oil. The function of this layer is to decrease the evaporation of Watery layer.