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U.S. Centers for Disease Control and Prevention

Wearing contacts 24/7 can have major consequences

Wearing contacts 24/7 can have major consequences

Dangerous infections, blinding ulcers in the eyes: These are just some of the troubles that can come from wearing your contacts for too long.

Contact lenses are generally considered safe, but wearing them while asleep significantly raises the risk of developing serious complications that can cause permanent visual loss, the U.S. Centers for Disease Control and Prevention warns.

In one instance, a 34-year-old man who both swam while wearing his contact lenses and wore them overnight three to four days a week developed a rare but potentially blinding form of keratitis caused by a microscopic organism.

Keratitis — an inflammation of the cornea — is responsible for an...

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