A list of the lens manufactures we use Carl Zeiss Vision:                Zeiss, Sola , American optical are all brands supplied by this German optical power house.                                            Rodenstock:                       ColorMatic lenses                                            Essilor:                               Varilux                                            Hoya: Nikon: Kodak: Norville optical:                Drivewear  photochromic polarised lens - the only photochromic to work behind a car windscreen