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What Are Dry Eyes?
In a normal eye, there is a production of tears, which coat the cornea with every blink. The cornea is a clear membrane similar in size to a small watch crystal, which covers the surface of the eye. Functions of tears include providing moisture or hydration and nutrients to the cornea; providing a smooth ocular surface on the cornea (necessary for vision), by filling in small surface abnormalities; and inhibiting the growth of microorganisms on the cornea by a mechanical flushing action. A decrease in the amount of aqueous (fluid) production or a change in the components that make up tears will result in dry eyes. This condition is known as dry eye syndrome, or keratoconjunctivitis sicca. The causes are varied, from disease, injury and infection, to incomplete blinking and side-effects of some medications. Wearers of contact lens will sometimes develop dry eye syndrome. Symptoms of dry eye syndrome are usually more noticeable at the end of a day, and during winter months, due to fatigue and environmental dryness.
Disclaimer To go forward, please acknowledge the following statement: The material provided on this site is designed for information and educational purposes only. The materials are not intended to be a self diagnostic and/or self treatment tool. We encourage you to use this information as a tool for discussing your situation with your health practitioner. |
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