ISO INTERNATIONAL STANDARD 8980-1 Fourth edition 2017-07 Ophthalmic optics Uncut finished spectacle lenses - Part 1: Specifications for single-vision and multifocal lenses Optique ophtalmique - Verres de lunettes finis non détourés - Partie 1: Specifications pour les verres unifocaux et multifocaux Reference number IS0 8980-1:2017(E) [so International Organization for Standardization @ IS0 2017 HEJIANG INSTOFSTANDARDIZATION C15956617 IS0 8980-1:2017(E) COPYRIGHTPROTECTEDDOCUMENT 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. ISOcopyrightoffice 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 Internatinair PrganizationforStandardization icensee-ZHEJIANG INSTOF STANDARDIZAoISQ07 -All rights reserved Not for Resale, 2017/9/27 05:18:00 etworking permitted without license from IHS IS0 8980-1:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions ..1 4 Classification 5 Requirements .2 5.1 Reference temperature .2 5.2 Optical requirements .2 5.2.1 General. 2 5.2.2 Back vertex power .2 5.2.3 Direction of the cylinder axis 2 5.2.4 Addition power for multifocal lenses. .3 5.2.5 Prismatic power 3 5.2.6 Prism base setting .4 5.3 Geometrical requirements 4 5.3.1 Requirements for size and thickness. .4 5.3.2 Requirements on segment dimensions for multifocal lenses .5 5.4 Orientation requirement for polarizing lenses ..5 6 Verification methods 5 6.1 General. ..5 6.2 Verification method for back vertex power. .5 6.3 Verification method for the direction of the cylinder axis. 6.3.1 General 5 6.3.2 Single-vision lenses. .5 6.3.3 Multifocal lenses. .5 6.4 Verification method for prismatic power. .6 6.4.1 General .6 6.4.2 Single-vision lenses (excluding position-specific single-vision lenses) .6 6.4.3 Position-specific single-vision lenses .6 6.4.4 Multifocal lenses. .6 6.5 Verification method for addition power 6.5.1 General .6 6.5.2 Procedure. ..6 6.6 Verification method for segment size .7 6.7 Inspection method for material and surface quality .7 7 Markingrequirementsfor single-visionlenses 7.1 Position-specific single-vision lenses. 7.2 Polarizing lenses.... .7 8 Identification and information ..8 9 Referencetothisdocument ..8 Annex A (informative) Material and surface quality Bibliography ..10 iii =ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under license with ISO ed without license from IHS Not for Resale, 2017/9/27 05:18:00