EN ISO 8596:2009
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Ophthalmic optics - Visual acuity testing - Standard optotype and its presentation (ISO 8596:2009)
01-31-2010
07-01-2009
ISO 8596:2009 specifies a range of Landolt ring optotypes and describes a method for measuring distance visual acuity under daylight conditions for the purposes of certification or licensing.It is neither intended as a standard for clinical measurements nor for the certification of blindness or partial sight.
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