Because the lenses may reduce tear production and disturb the normal tear film, prolonged lens wear might cause dry, irritated eyes. Contact lenses reduce the amount of oxygen reaching the cornea, and ...

Some contact lenses are approved by the Food and Drug Administration (FDA) for extended wear, including overnight use. However, experts, including the Centers for Disease Control and Prevention ...

The single, largest risk factor for permanent vision loss due to contact lenses is wearing lenses overnight. Your risk for developing an infection is six to eight times higher if you sleep with ...

With Ortho-K, contact lenses are used to reduce the corneal curvature ... You will be given EXACT wearing instructions, which typically involves wearing the lenses overnight only. Generally, you will ...