The OptiView are dedicated cycling sports glasses for riders who need prescription lenses whilst riding, but still want the convenience of being able to swap tinted lenses to adjust for changes in light conditions. On the inside of the frame is a special prescription-ready mount that will hold lenses with a spheric range from +6 tot -6 . In certain cases even stronger prescriptions can be fitted, an optician is able to analyze what the possibilities are. Eye tests and fitting of your prescription lenses should be carried out by a qualified optician.