2017EN ISO 8980-2:2017 Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for power-variation lenses
2004EN ISO 8980-2:2004 Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for progressive power lenses ISO 8980-2:2004; Incorporating Corrigendum September 2006
1997EN ISO 8980-2:1997 Opthalmic Optics - Uncut Finished Spectacle Lenses - Part 2: Specifications for Progressive Power Lenses