This standard BS EN ISO 18369-2:2017 Ophthalmic optics. Contact lenses is classified in these ICS categories:
01.040.11 Health care technology (Vocabularies)
11.040.70 Ophthalmic equipment
This document specifies the tolerance limits of the principal optical and physical parameters of rigid corneal, rigid scleral and soft contact lenses at the time of manufacture.
These tolerances might not apply to other purposes, for example, shelf-life studies.