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Serious Eye Infections Linked To Improper Care Of Contact Lens

by Dr. Meenakshy Varier on August 22, 2016 at 11:12 AM
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Serious Eye Infections Linked To Improper Care Of Contact Lens

Contact lenses are so ubiquitous that it's easy to forget that they're actual medical devices, with small but real medical risks. About 41 million people in the U.S. wear them.

An analysis published by the Centers for Disease Control and Prevention examined 1,075 reports of corneal infections related to contact lens use from the Food and Drug Administration's Medical Device Report database over a decade from 2005 to 2015. These contact lens-related eye infections can lead to long-lasting eye damage but are often preventable.

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To be sure, these were likely the worst of the worst of these types of infection and can't be considered representative of contact lens infections overall. But of those reports, almost 20% described a patient with injuries resulting in decreased vision or a corneal scar, or requiring a corneal transplant. The study was published in Morbidity and Mortality Weekly Report (MMWR).

"Contact lenses are a safe and effective form of vision correction when worn and cared for as recommended," said Michael Beach, Ph.D., director of CDC's Healthy Water Program. "However, improper wear and care of contact lenses can cause eye infections that sometimes lead to serious, long-term damage."
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And the risk factors for these serious cases of keratitis, inflammation of the cornea, are the same as for more common, less serious cases, says Thomas Steinemann, a clinical spokesman for the American Academy of Ophthalmology and practicing ophthalmologist at Metro Health Medical Center in Cleveland. Corneal infections prompt about 1 million clinic and ER visits a year, and contact lens use is the top risk factor, he says.

More than 10% of the reports indicated that the patient went to an emergency department or urgent care clinic for immediate care. Whether eye infections are minor or lead to long-lasting damage, they can be painful and disrupt daily life. For instance, the reports describe patients' daily visits to an eye doctor or hourly administration of eye drops to treat the infection.

More than 1 out of 4 reports of infections mentioned easily avoidable behaviors that increase the chance of getting an eye infection, such as wearing contact lenses while sleeping and wearing them longer than recommended.

One big mistake sleeping in your lenses, which was associated with infection in 7% of the reports. Previous research shows that overnight wear increases the risk for contacts-related infections by more than six-fold. "I advise patients not to sleep in them, regardless of whether or not a lens is approved for extended or continuous wear," says Steinemann.

Not throwing them out or not replacing them when you're supposed to is another risk factor and was associated with 8% of the reported infections.

Then there are the cleaning mistakes, such as using tap water instead of disinfectant solution, or reusing the previous day's solution. "Many people get busy, look in the lens case and think there's still some solution in there," says Steinemann. But using old solution is "a terrible idea," he says, because it loses potency and can get contaminated with germs. Dump out the old solution, clean out the case with a little extra solution, and let it air dry before using again, he says.

Previous research has suggested that only about 2% of contact lens wearers follow the rules for safe contact lens use. Other false practices are showering and swimming with your lenses in and hanging on to your storage case for too long. Sharing contact lens can also prove hazardous.

Also, it should be obvious that contacts should be acquired through the proper medical channels from a trusted source. But in 1.5% of the reports, the lenses were bought from "an unapproved source such as a flea market or costume shop."

"Used properly, [contacts are] a very, very successful and safe method of correcting vision, says Steinemann. "But [they are] not without responsibility."

The findings in this report highlight the need for contact lens wearers to take good care of their lenses to help prevent contact lens-related eye infections.

Source: Medindia
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