SS-EN-ISO-8596 › Ophthalmic optics - Visual acuity testing - Standard and clinical optotypes and their presentation (ISO 8596:2017)
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ISO 8596:2017 specifies a range of Landolt ring optotypes and describes a method for measuring distance visual acuity under photopic conditions for the purposes of certification or licensing. ISO 8596:2017 is neither intended as a standard for clinical measurements nor for the certification of blindness or partial sight. Other optotypes used for clinical investigations are described in Annex A for information.
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SS-EN ISO 8596:2018
Feb. 2, 2018
EN ISO 8596:2018(IDT); ISO 8596:2017(IDT)