DIN EN ISO 7921
Ophthalmic optics and instruments - Near vision charts (ISO/DIS 7921:2023); German and English version prEN ISO 7921:2023
Augenoptik und ophthalmische Instrumente - Nahsehschärfetafeln (ISO/DIS 7921:2023); Deutsche und Englische Fassung prEN ISO 7921:2023
Responsible national committee
NA 027-01-08-10 AK - Visual acuity and test methods
Responsible european committee
CEN/TC 170 - Ophthalmic optics
Responsible international committee
ISO/TC 172/SC 7/WG 6 - Ophthalmic instruments and test methods