Biofinity is a new contact lens from CooperVision, made from a silicon hydrogel material that is naturally water-loving. The material does not only love water it is also highly breathable which means that it allows great volumes of oxygen to flow freely through the lens.
With this technology you get lenses that keep your eyes moist throughout the entire day. The material is also resistant to protein deposits. Research has also shown that Biofinity induces less staining than other contact lenses. (http://www.clspectrum.com/article.aspx?article=102040) Biofinity are very comfortable contact lenses, and has been approved by the FDA for overnight wear for up to six nights.
The lens has an aspheric design that minimizes so-called spherical aberrations. Spherical aberration is a refractive error that can cause problems especially during lower light conditions, for example when driving in the dark. Reducing spherical aberrations can give better image resolution and increased depth of focus.