Fits a most medium to wide faces! We must have a completed prescription faxed to us if ordering correction lenses other than the standard "Gauge Reader". Prescriptions take 7 days to process. PLease include pupil distance measurement. Your mask will be just like a pair of glasses & will correct for astigmatism as well. Comes with defogger & hard case. Note: Never use abrasives, such as toothpaste, on the lenses. Bifocals are underwater corrected & won't read correctly until placed in water. Color Corrective Filtered Lenses: The Color Correcting Filter (magenta) lense is designed for use in warmer waters where colors are more rich and vibrant. By using the color correcting filters, users will have the opportunity to better experience the colors of the underwater world that are often lost at depth. This unique product is designed to filter out blue wavelengths in the water, allowing your eyes to see the brilliant reds, yellows, oranges and violet colors. The lenses are made from high quality composite hard resin material (CR-39) which makes them stronger than normal glass lenses and much more efficient. 100% U/V Protection against the harmful rays of the sun. MaxSeaVision Filtered Lenses: The MaxSeaVision™ Filter (yellow) lense is for use in low light situations. Technical divers, cave divers and those diving in turbid waters around the world will benefit from this shield which helps to optimize available light and help improve visibility at the same time. The lenses are made from high quality composite hard resin material (CR-39) which makes them stronger than normal glass lenses and much more efficient. 100% U/V Protection against the harmful rays of the sun. Gauge Reader™ +2.00 Lenses: Optical professionals at SeaVision know that every scuba diver has unique vision needs. Everyone's eyes are different and require different levels of correction. These lenses allow divers to view close-up objects (like gauges) with clarity, while also providing a means for clear sight at distances. 100% U/V Protection against the harmful rays of the sun.