DIN EN ISO 8980-2:2017-12 Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for power-variation lenses (ISO 8980-2:2017); German version EN ISO 8980-2:2017
2017DIN EN ISO 8980-2:2017-12 Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for power-variation lenses (ISO 8980-2:2017); German version EN ISO 8980-2:2017
2017DIN EN ISO 8980-2:2017 Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for power-variation lenses (ISO 8980-2:2017); German version EN ISO 8980-2:2017
2004DIN EN ISO 8980-2:2004 Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for progressive power lenses (ISO 8980-2:2004); German version EN ISO 8980-2:2004