AIR OPTIX AQUA breathable contact lenses deliver an advanced combination of oxygen and moisture for a healthy, natural feeling. The lens also offers excellent all-day comfort right from the start. Clinical research shows the lens sustains its performance through a month of wear. AIR OPTIX AQUA is approved for daily wear or up to 6 nights of extended wear. For daily wear or extended wear up to 6 nights for near/ far-sightedness. Risk of serious eye problems (i.e., corneal ulcer) is greater for extended wear. In rare cases, loss of vision may result. Side effects like discomfort, mild burning or stinging may occur.