This standard specifies fundamental requirements for unglazed spectacle frames designed for use with all prescription lenses. It is not applicable to custom-made spectacle frames or to products designed specifically to provide personal eye protection. The standard was prepared under a mandate from the European Commission for the purpose of specifying the essential requirements of EU Directive 93/42/EEC (Medical Devices). Compared to the July 2012 edition, only the European Annex ZA, which shows the connections between the Clauses of the standard with the fundamental requirements of EU Directive 93/42/EEC, was modified. The reference version of the International Organization for Standardization, ISO 12870:2012, which was incorporated into the European Standard remains unaffected. This European Standard has been prepared by CEN/TC 170 "Ophthalmic optics". On the national level, the Working Committee NA 027-01-08 AA "Augenoptik" ("Ophthalmic optics"), Working Group "Brillenfassungen" ("Spectacle frames") at NAFuO is responsible.