1、American National Standardfor Ophthalmics Ophthalmic Optics Specifications for Single-VisionReady-to-Wear Near-VisionSpectaclesANSI Z80.31-2012ANSIZ80.31-2012ANSIZ80.31-2012American National Standardfor Ophthalmics Ophthalmic Optics Specifications for Single-VisionReady-to-Wear Near-Vision Spectacle
2、sSecretariatThe Vision CouncilApproved July 25, 2012American National Standards Institute, Inc.Approval of an American National Standard requires review by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen met by the standards developer.Consensus is estab
3、lished when, in the judgement of the ANSI Board ofStandards Review, substantial agreement has been reached by directly andmaterially affected interests. Substantial agreement means much more thana simple majority, but not necessarily unanimity. Consensus requires that allviews and objections be cons
4、idered, and that a concerted effort be madetowards their resolution.The use of American National Standards is completely voluntary; theirexistence does not in any respect preclude anyone, whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingproducts, proces
5、ses, or procedures not conforming to the standards.The American National Standards Institute does not develop standards andwill in no circumstances give an interpretation of any American NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American
6、National Standard in the name of the AmericanNational Standards Institute. Requests for interpretations should beaddressed to the secretariat or sponsor whose name appears on the titlepage of this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The pr
7、ocedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.Ameri
8、can National StandardPublished byThe Vision CouncilZ80 Secretariat225 Reinekers LaneAlexandria, VA 22314Copyright 2012 by The Vision CouncilAll rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of
9、 the publisher.Printed in the United States of AmericaDeveloped byThe Accredited Committee Z80 for Ophthalmic StandardsThe Vision CouncilZ80 Secretariat225 Reinekers LaneAlexandria, VA 22314iContentsPageForeword ii1 Scope. 11.1 Purpose 12 Normative references. 13 Definitions 24 General requirements
10、34.1 Compliance 34.2 Impact resistance. 34.3 Flammability. 34.4 Cosmetic quality. 34.5 Refractive properties 34.5.1 Refractive power 34.5.2 Astigmatic power 34.5.3 Prismatic power . 44.6 Labeling of product 44.7 Country of origin. 44.8 Identification of the standard 45 Test procedures. 45.1 Impact r
11、esistance test 45.1.1 Lens only 55.1.1.1 Lens on tube 55.1.1.2 Lens on block. 55.1.1.3 Modification of supports. 55.2 Alternate tests 55.3 Flammability test 65.4 Cosmetic quality test 65.5 Refractive, astigmatic, and prismatic test methods 6AnnexA Figures. 7iiForeword (This foreword is not part of A
12、merican National Standard ANSI Z80.31-2012.)The purchasers and users of single-vision ready-to-wear near-vision spectacles needto be assured of certain minimum levels of performance and quality in these prod-ucts. These are either implicit expectations in the product performance, or safety.The purch
13、aser of the product does not ordinarily have the means to properly assessthese characteristics. In order to accomplish these goals, it is necessary to establishcommonly accepted definitions, equations, sources, and methodology so that manu-facturers can produce products to meet the standard.This Ame
14、rican National Standard specifies impact-resistant characteristics; cosmet-ic, refractive properties of lenses; and the flammability of frames and lenses. Cosmet-ic, refractive, and frame properties specified herein are intended as guidelines, andtherefore they are subject to revision since there is
15、 a need to study further the validityof these property specifications as related to actual normal use requirements.The Z80.31 working group is under the subcommittee SC2 of Z80, which also re-views Z80.3, Nonprescription Sunglass and Fashion Eyewear Requirements, andwas organized in December 1970 an
16、d had its first meeting on January 7, 1971. Thecurrent Chair of the committee is Kenneth L. Frederick, Technical Director of theSunglass Association of America. He has been chair since 2004. The committee usu-ally meets formally twice per calendar year, and the members review material byemail, phone
17、 or fax throughout the year. Working groups may be formed to investi-gate specific projects, and a working group for single-vision ready-to-wear near-vi-sion spectacles was formed in 2010 and developed this standard, Z80.31-2012.This standard contains one annex, which is informative and is not part
18、 of this stan-dard. Suggestions for improvement of this standard will be welcome. They should besent to the Vision Council, 225 Reinekers Lane Suite 700, Alexandria, VA 22314.This standard was processed and approved for submittal to ANSI by the AccreditedStandards Committee on Ophthalmic Standards,
19、Z80. Committee approval of thisstandard does not necessarily imply that all committee members voted for its approv-al. At the time it approved this standard, the Z80 Committee had the following mem-bers:Thomas C. White, ChairpersonQuido Cappelli, Vice-ChairpersonDr. Robert Rosenberg, SecretaryJeff E
20、ndres, SecretariatRick Van Arnam, Legal CounselOrganization Represented Name of RepresentativeAdvance Medical Technologies Association Paul LudingtonAmerican Academy of Ophthalmology . Dr. Thomas WhiteAmerican Academy of Optometry. Dr. David LoshinAmerican Ceramic Society . Lyle RubinAmerican Glauco
21、ma Society Dr. Steven GeddeAmerican Optometric Association Dr. Karl CitekAmerican Society of Cataract and Refractive Ophthalmology Dr. Stephen KlyceAssociation for Research in Vision 2 The test block is to be inserted in the base plate described in Figure A.3 of this standard. This test block is app
22、licable to the majority of ophthalmic lenses. However, if any diameter of the edged lens is less than 32 mm (1-1/4 in), a substitute support may be used the outside diameter of which is equal to or less than the smallest diameter of the edged lens. The wall thickness of the neoprene gasket is a nomi
23、nal 3 mm (1/8 in). Figure A.1 Lens on tube ANSI Z80.31-2012 8 NOTE Only one required. The material is cold-rolled steel (ground stock), American Iron and Steel Institute No. C1018 or the equivalent. Normal machine-shop tolerances shall apply to all dimensions. A base of alternate design may be used
24、provided that it is a rigid iron or steel member and that the total weight of the member and rigidly attached fixtures is not less than 12.25 kg (27 lb). Figure A.2 Base plate ANSI Z80.31-2012 9 NOTE This test block shall be inserted in the base plate described in figure 3 of this standard. The neop
25、rene gasket shall have a durometer hardness of 40 + 5 Shore A, as determined by ASTM D2240-2003; a minimum tensile strength of 8.274 kPa (1200 psi) as determined by ASTM D412-2002; and a minimum ultimate elongation of 400%, as determined by ASTM D412-2002. The gasket shall be securely bonded to the support tube. The test block shall be made of cold-rolled steel, American Iron and Steel Institute No. C1018, or the equivalent. One is required for each shape and size of lens. Normal machine-shop tolerances shall apply to all dimensions. Figure A.3 Lens on block
