2020EN ISO 8596:2018/A1:2020 Ophthalmic optics - Visual acuity testing - Standard and clinical optotypes and their presentation - Amendment 1 (ISO 8596:2017/Amd1:2019)
2018EN ISO 8596:2018 Ophthalmic optics - Visual acuity testing - Standard and clinical optotypes and their presentation
2009EN ISO 8596:2009 Ophthalmic optics - Visual acuity testing - Standard optotype and its presentation (ISO 8596:2009)
1996EN ISO 8596:1996 Ophthalmic Optics - Visual Acuity Testing - Standard Optotype and Its Presentation (ISO 8596 : 1994)