ISO INTERNATIONAL STANDARD 18369-1 Second edition 2017-08 Ophthalmic optics Contact lenses Part 1: Vocabulary, classification system and recommendations for labelling specifications Optique ophtalmique - Lentilles de contact - Partie 1: Vocabulaire, systeme de classification et recommandations pour I'étiquetage des spécifications Reference number ISO 18369-1:2017(E) osi International Organization for Standardization @ IS0 2017 ted without license from IHS IS0 18369-1:2017(E) COPYRIGHT PROTECTED DOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either Iso at the address below or Iso's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internatinir DrganizationforStandardization @ IS0 2017 - All rights reserved No reproduction or networking permited without license from IHS IS0 18369-1:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms, definitions and symbols Terms and definitions ..1 3.2 Symbols..... ..38 4 Classification of contact lens materials .39 Annex A (informative) Specification of rigid contact lenses ..42 Annex B (informative) Specification of soft contact lenses ..52 Bibliography ..54 Alphabetical index of terms .56 iii d without license from IHS