Dry eye syndrome is a disorder of eye occurs in people who do not posses right quality of tears or who do not produce enough amount of tears which is necessary for keeping the eye healthy and relaxed.
There are three films of tear in the eye;
- Oily layer
- Watery layer
- Layer of mucus
Each layer has its special characteristics and special purpose. Oily layer is formed by the meibomian glands. Tear film’s outer most layer is formed of oily layer. Purpose of this layer is to make the tear surface smoother and minimize the evaporation of tears. Watery layer is produced by Lacrimal glands. The middle watery layer produces the water, the water known as tears among ordinary people. Purpose of middle layer is to clean the eye and to wash out irritants and foreign particles. The inner most layer is the layer of mucus. It is produced by conjunctiva. Purpose of mucus is to allow the middle layer to spread smoothly and evenly over the eye. If there will be no mucus, there will be no sticking of tears to the eye.
Usually eye takes a constant bath of tears. Eye always keeps itself moist with the help of tears which it produces at a slow but steady rate. Thus this way eye maintains a required level of lubrication. Eye also produces huge amount of tears quickly in response to irritation or emotion. When one cries or when there is some outer object in eye territory eye produces bulk of tears. These sudden increases in tears overwhelm the drainage system of tear. These extra tears then overflow from eye. [Read more…]