BS EN ISO 8596:2018+A1:2020

Ophthalmic optics. Visual acuity testing. Standard and clinical optotypes and their presentation. | Status: Current

1 Scope This document 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. This document 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.