PureVision 2HD is a monthly disposable lens from Bausch & Lomb. Because PureVision 2HD lenses are made of AerGel, a unique material that lets natural levels of oxygen reach your eyes, they stay comfortable and healthy while resisting protein and debris buildup on the lens. You may hardly notice you're wearing lenses at all. PureVision 2HD's revolutionary new material allows up to five times more oxygen to the cornea than conventional soft lenses to promote ocular health. The Bausch & Lomb PureVision 2HD visibility tinted contact lens is indicated for daily wear or extended wear from 1 to 30 days between removals for cleaning and disinfection or disposal of the lens, as recommended by the eye care professional.