ISO INTERNATIONAL STANDARD 9801 Second edition 2009-12-15 Ophthalmic instruments Trial case lenses Instruments ophtalmiques - Verres de boite d'essai Reference number ISO 9801:2009(E) @ ISO 2009 by IHS under lic itted without license from IHS Not for Resale ISO 9801:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHT PROTECTED DOCUMENT ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, isO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2009 - All rights reserved I without license from IHS Not for Resale ISO 9801:2009(E) Contents Page Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Requirements. 4.1 General 4.2 Opticalrequirements 4.3 Construction.... 4.4 Material and surface quality 5 Test methods. 5.1 5.2 Checking the optical requirements 5.3 Checking material and surface quality... 5.4 Checking construction. 6 Functional marking 7 Information supplied by the manufacturer 7.1 Accompanying documents. 7.2 Identification of the trial case lens set . Annex A (informative) Example of test device for checking accuracy of trial case lens elements.. .8 Annex B (informative) Example of test device and method for checking material and surface quality Bibliography CopyrghtInternational Organizaionsadardizaoghtsreserved ii se from IHS Not for Resale