1998EN ISO 9339-1:1998 Optics and Optical Instruments - Contact Lenses - Determination of the Thickness - Part 1: Rigid Contact Lenses ISO 9339-1:1996
EN ISO 9339-1:1998 Optics and Optical Instruments - Contact Lenses - Determination of the Thickness - Part 1: Rigid Contact Lenses ISO 9339-1:1996 was changed to EN ISO 18369-3:2006 Ophthalmic optics - Contact lenses - Part 3: Measurement methods (ISO 18369-3:2006).