This International Standard specifies fundamental requirements for unglazed spectacle frames designed for use with all prescription lenses, and is applicable to frames at the point of sale to the retailer, by the manufacturer or supplier. It is applicable to all spectacle frame types including rimless mounts, semi-rimless mounts and folding spectacle frames. This International Standard is applicable to spectacle frames made from natural organic materials. NOTE See Annex A for recommendations on the design of spectacle frames. This International Standard is not applicable to complete custom-made spectacle frames or to products designed specifically to provide personal eye protection.