?superior field of view in a medium sized, frameless design. one size does not fit all, so oakley has expanded the popular flight deck family with a mid-sized fit. inspired by the helmet visors of fighter pilots, the oakley flight deck m offers a maximum field of view so you won’t miss a single target of opportunity. the ridgelock interchangeable lens system lets you adapt your lens to whatever the weather decides to bring.prizmâ„¢ sapphire iridium lensprizmâ„¢ lenses adapt to weather conditions and provides optimal colour representation while maximising depth perception and greatly improving visibility. the lenses are injection molded under extreme pressure with impact-resistant plutonite® to create a precise contour with optically correct geometry and clarity.