No More Dry Eyes — Tips to Get the Grit Out

Tuesday, January 20, 2009

ROCHESTER, Minn. — Dry eyes can be a nuisance. But when severe cases are not treated, the condition becomes more than an irritation. The surface of the eye is susceptible to infection and scarring. The January issue of Mayo Clinic Health Letter covers the causes of dry eyes and treatment options.

Healthy eyes are continuously covered by layers of fluids. The outermost layer includes fatty acids that smooth the tear surface and slow evaporation of the thicker, middle layer, which is mostly water. Mucus makes up the innermost layer, which allows tears to be evenly spread over the eye surface. Dry eyes happen when any of these three components is out of balance.

For example, dry eyes occur when tear glands don't produce enough fluids or when problems with blinking hamper tear distribution. Also, several commonly used medications, including diuretics, pain relievers, sleep medications and antidepressants, can cause dry eyes.

Most people with dry eyes don't develop long-term complications, but they can happen. Treatments are designed to both increase comfort and reduce the possibility of complications. The best treatment depends on what is causing dry eyes.

If the irritant is lack of tears, using nonprescription artificial tears is the mainstay treatment. Generally, it's best to avoid drops such as Clear Eyes and Visine, which reduce redness but may aggravate dry eyes. Some products have a thicker consistency, and their effects last longer, but they can blur vision. Others such as Refresh Dry Eye Therapy use an oil-based component to help prevent evaporation. Another option, Optive, lubricates the eye surface and keeps the eye healthy.

For severe dry eyes, a physician may recommend tear conservation methods such as blocking tear drainage with tiny silicone plugs or cauterizing the tissues of the tear drainage area so scarring closes the tear ducts.

Other options are prescription cyclosporine (Restasis) drops and corticosteroid drops or contact lenses that cover the white of the eye to help retain moisture. For impaired blinking, surgery may be needed.

At home, using eyedrops before eyes become irritated is helpful. Protecting eyes from blowing air, for example with wraparound sunglasses, can reduce eye irritation. So can avoiding smoke and not rubbing the eyes. A humidifier can help when the air inside the home is dry.

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Mayo Clinic Health Letter is an eight-page monthly newsletter of reliable, accurate and practical information on today's health and medical news. To subscribe, please call 800-333-9037 (toll-free), extension 9771, or visit www.healthletter.mayoclinic.com.

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About Mayo Clinic

Mayo Clinic is the first and largest integrated, not-for-profit group practice in the world. Doctors from every medical specialty work together to care for patients, joined by common systems and a philosophy of "the needs of the patient come first." More than 3,700 physicians, scientists and researchers and 50,100 allied health staff work at Mayo Clinic, which has sites in Rochester, Minn; Jacksonville, Fla; and Scottsdale/Phoenix, Ariz. and community based providers in more than 70 locations in Southern Minn., Western Wis. and Northeast Iowa. These locations treat more than half a million people each year. To obtain the latest news releases from Mayo Clinic, go to www.mayoclinic.org/news. For information about research and education, visit www.mayo.edu. MayoClinic.com is available as a resource for your health stories.