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The introduction of silicone hydrogel contact lenses, which allow for increased levels of oxygen to reach the cornea, has resulted in a resurgence of extended wear contact lenses that can be worn overnight. Many believe sleeping while wearing these types of contacts is safe but there is an increased risk of infection in those who sleep while wearing contact lenses. This even applies to contact lenses approved for extended wear. While there are some contact lenses which are approved for use for 30 days, your eye care provider may recommend a shorter wearing schedule. Following these recommendations can help to maintain overall eye health.