DIN Standards Committee Optics and Precision Mechanics
DIN EN ISO 18369-4
Ophthalmic optics - Contact lenses - Part 4: Physicochemical properties of contact lens materials (ISO 18369-4:2017, Corrected version 2017-10-01); German version EN ISO 18369-4:2017
Augenoptik - Kontaktlinsen - Teil 4: Physikalisch-chemische Eigenschaften von Kontaktlinsenmaterialien (ISO 18369-4:2017, korrigierte Fassung 2017-10-01); Deutsche Fassung EN ISO 18369-4:2017
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NA 027-01-08-04 AK - Contact lenses
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CEN/TC 170 - Ophthalmic optics