YY 0477-2004 Translated English of Chinese Standard. YY0477-2004


Book Description

This Standard specifies the classification, technical requirements, testing methods, inspection rules, packing requirements and the recommended fitting program of the rigid gas permeable contact lenses for orthokeratology.




YY 0477-2016 Translated English of Chinese Standard. YY0477-2016


Book Description

This Standard specifies the terms and definitions, requirements, test methods, sampling and inspection rules, marks, labels and accompanying data, packaging for rigid gas permeable contact lenses for orthokeratology (hereinafter referred to as orthokeratology lenses). Orthokeratology lenses are expected to be used by temporarily altering corneal morphology in order to achieve temporary correction of refractive errors.