Historical
BS EN ISO 8596:2018
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.
Content Provider
British Standards Institution [bsi]