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Lens that you can sleep in

London, March 22 (Reuters): A new generation of contact lenses can significantly reduce the risk of severe eye infections, researchers said today.

Wearers who keep their lenses in overnight can develop keratitis ' inflammation or irritation of the cornea ' but scientists found the new ones cut that risk fivefold.

'Those who choose to sleep in lenses should be advised to wear silicone hydrogel lenses, which carry a five times decreased risk of severe keratitis for extended wear compared with hydrogel lenses,' said Dr Philip Morgan of University of Manchester in the Journal of Ophthalmology.

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