EN ISO 18369-2-2017 en Ophthalmic optics - Contact lenses - Part 2 Tolerances.pdf
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1、Ophthalmic optics Contact lensesPart 2: Tolerances (ISO 18369-2:2017)BS EN ISO 18369-2:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN ISO 18369-2:2017. It is identical to ISO 18369-2:2017. It
2、supersedes BS EN ISO 18369-2:2012, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee CH/172/9, Contact lenses and contact lens care products.A list of organizations represented on this committee can be obtained on request to its secretary.This publicatio
3、n does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 87558 8ICS 11.040.70; 01.040.11Compliance with a British Standard cannot confer im
4、munity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 18369-2:2017EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE N
5、ORMEN ISO 18369-2September 2017ICS 01.040.11; 11.040.70 Supersedes EN ISO 18369-2:2012EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN Ref. No. EN ISO 18369-2:2017: EAll rights
6、of exploitation in any form and by any means reserved worldwide for CEN national MembersOphthalmic optics Contact lenses Part 2: Tolerances (ISO 18369-2:2017)Optique ophtalmique Lentilles de contact Partie 2: Tolrances (ISO 18369-2:2017)Augenoptik Kontaktlinsen Teil 2: Grenzabweichungen (ISO 18369-2
7、:2017)This European Standard was approved by CEN on 1 July 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical re
8、ferences concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a C
9、EN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedoni
10、a, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 18369-2:2017 (E)European forewordThis document (
11、EN ISO 18369-2:2017) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics” in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics” the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publicat
12、ion of an identical text or by endorsement, at the latest by March 2018, and conflicting national standards shall be withdrawn at the latest by March 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held respo
13、nsible for identifying any or all such patent rights.This document supersedes EN ISO 18369-2:2012.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyp
14、rus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and t
15、he United Kingdom.2BS EN ISO 18369-2:2017ISO 18369-2:2017(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 General 14.1 Tolerance limits for contact lenses 14.2 Conformance criteria for testing products . 24.3 Conditioning of contact lenses prior to testing . 24.4 Transmi
16、ttance of ultraviolet radiation . 24.5 Requirements for finish . 24.5.1 Inclusions and surface imperfections 24.5.2 Fenestrations. 24.5.3 Edge contour and finish . 24.6 Additional properties 25 Tolerances for rigid contact lenses 26 Tolerances for soft contact lenses 4Bibliography 7 ISO 2017 All rig
17、hts reserved iiiContents PageBS EN ISO 18369-2:2017ISO 18369-2:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technic
18、al committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely wi
19、th the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed
20、 for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rig
21、hts. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in thi
22、s document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Tr
23、ade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 7, Ophthalmic optics and instruments.This third edition cancels and repl
24、aces the second edition (ISO 18369-2:2012), which has been technically revised.A list of all parts in the ISO 18369 series can be found on the ISO website.iv ISO 2017 All rights reservedBS EN ISO 18369-2:2017Ophthalmic optics Contact lenses Part 2: Tolerances (ISO 18369-2:2017)1 ScopeThis document s
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