1998EN ISO 9339-2:1998 Optics and Optical Instruments - Contact Lenses - Determination of Thickness - Part 2: Hydrogel Contact Lenses ISO 9339-2:1998
EN ISO 9339-2:1998 Optics and Optical Instruments - Contact Lenses - Determination of Thickness - Part 2: Hydrogel Contact Lenses ISO 9339-2:1998 was changed to EN ISO 18369-3:2006 Ophthalmic optics - Contact lenses - Part 3: Measurement methods (ISO 18369-3:2006).