ISO INTERNATIONAL STANDARD 10939 Third edition 2017-05 Ophthalmic instruments Slit-lamp microscopes Instruments ophtalmiques - Microscopes avec lampe a fente Reference number ISO 10939:2017(E) International Organization for Standardization see=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @IS02017 vided by IHS under I Not for Resale,2017/8/2102:4239 No reproduction or networking permitted without license from IHS IS0 10939:2017(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 or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior 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 [email protected] www.iso.org Licensee-ZHEJIANG INST OF STANDARDIZzRoISQ7 - All rights reserved Not for Resale, 2017/8/21 02:42:39 networking permited without license from IHS IS0 10939:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 Requirements .2 4.1 General .2 4.2 Optical requirements 4.3 Construction and function .4 4.3.1 General ..4 4.3.2 High eye point eyepiece .4 4.4 Opticalradiationhazardwithslit-lampmicroscopes .4 5 Accompanying documents 6 Marking Bibliography 6 ntemaonalgnzatin7-All rights reserved ii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under I se with ISt ed without license from IHS