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BS EN ISO 8596:2018+A1:2020

Ophthalmic optics. Visual acuity testing. Standard and clinical optotypes and their presentation (British Standard)

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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