free sample colored contact lenses by mail When we are awake and blinking, contact lenses should be shifted approximately one millimeter so that the cornea is able to receive oxygen. However, the contact lenses while sleeping can not move because the eye does not blink," said Taylor.
Other adverse effects are infections. The slightest friction between the back of the contact lens in contact with the cornea can cause bacterial or parasitic infections. Microorganisms can be carried by the contact lenses before use.
"The bacteria can be carried by contact lens is dirty or worn for too long. Even through clean potable water though," he said.
Parasites are found in water, among others Acanthamoeba that can cause eye infections. Another danger is corneal ulcers or open sores in the outer layer of the cornea. Taiwan reported a woman blinded by using contact lenses for six full months.
In 2012, research in the journal Ophthalmology, showed that the risk of keratitis (corneal inflammation) will increase 6.5-fold due to using contact lenses during sleep. This will not happen if the users to remove contact lenses before bed.
Indeed there are contact lenses that permission Agency of the US Food and Drug Administration (FDA) may be used several days in a row. However, Taylor and the FDA recommends not to use up all night and release a minimum of once a week.
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