Many contact lens wearers are guilty of occasionally forgetting to take their contact lenses out at night.

However, the bad habit has been listed in a story published on MSNBC.com as a "time saver that hurts your health".

Along with not flossing, not removing makeup and biting broken nails, sleeping in contacts has been highlighted as a potentially harmful habit.

I-GO says, however, that the "i-GO OVC is a new kind of contact lens that corrects your vision while you sleep and is specifically designed to be worn overnight.

"The base material - made by Bausch and Lomb, is highly oxygen permeable and the lenses are worn only 6-8hrs versus conventional daytime contact lenses which may be worn up to 16 hours a day.

"The i-GO lenses reshape the eye so that when you remove them you have perfect lens free vision and oxygen is getting to the eye all day long."

Thomas L Steinemann, an associate professor of ophthalmology at Case Western Reserve University, said that keeping lenses in that aren't designed to be there impedes the flow of oxygen to the eye that it can already be deprived of by contact lens wearing in the day.

"When you close your eyes for hours while sleeping, it's even worse," he added.

A study published in the New England Medical Journal showed that there were odds of one in 2,500 that daily wear of contact lenses could lead to a bacterial infection of the eye.
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