Posted by Brian on October 23, 2017
When your eyes do not produce enough tears, it is referred to as “dry eye.” In order for our eyes to remain healthy and comfortable, tears must lubricate the eye’s surface. When you blink a film of tears, called ‘tear film,’ spreads across the eye’s surface to wash away particles that do not belong in they eye and prevent tears from drying too quickly all while keeping the surface of the eye moist.
Experts estimate that millions of adults that live in the United States are affected by dry eye. As you age your chances for developing dry eye increases. Women have a higher chance of developing dry eye compared with men.
Tears are what lubricates our eyes, which results in having the ability to see clearly. When you blink tears form a tear film that spreads over the eye, keeping the surface smooth and clear. Also with each blink, the tear film continuously bathes the cornea - the clear, dome shaped outer surface of the eye - which nourishes its cells and provides it with a layer of liquid protection.
The tear film consist of three layers, each with it’s own purpose, however all layers work together to keep eyes healthy and prevent infections from occurring.
When nearby glands change the composition of the tears or fail to produce enough tears for the tear film, vision and the eye’s health are compromised. Tears on the surface of the eye play a critical role in focusing light, which can severely impact vision.
Tears are composed of a mixture of mucus, water, and fatty oils. More than 1500 different protein types keep the surface smooth and protected from any foreign object.
If tear production changes, whether it increases or decreases its production, the tear composition is imbalanced. The following are factors that contribute to dry eye:
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