How Do Tears Prevent Dry Eyes?
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Tears are a major protective agent for the eyes. Tears not only wash away dust from the eyes, but also soothe the eyes, provide oxygen and nutrients to the cornea, as well as help defend against eye infections by removing microorganisms that can colonize in the eyes.
Tears are of composed of three distinctive layers. The outer lipid section consists of an oily film that counters evaporation and keeps the eye moistened. The middle region is made of mostly water that moisturizes the eyes and some nutrients and proteins that assist in limiting eye infections. The inner coating contains mucous that allows the tear film to spread and reduces evaporation from the eye. Each layer is vital to the health of the eyes and different parts of the eye add to the tears which can lead to any number of possible problems like shortage of nutrients or mucous. It also shows that dry eyes are more likely if there is a depletion of tears due to reduction of generation because of age or by weather issues like windy days which can dry out tears quickly.
The importance of tears is also shown by all the over the counter medication that uses eyedrops, ointments, or oral capsules designed to either keep the eye moisturized or copy the role of tears. TheraTears™ is an example of manufactured teardrops whose role is to mimic the role of tears.
Tags: CVS, Dry eyes, Eye, Eyecare, Eyeglasses, health, PC, Tear
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