ANSI Z80.1-2020 American National Standard for Ophthalmics Prescription Ophthalmic Lenses - Recommendations ANSI Z80.1-2020 ANSI Copyright American National Stal Copyright AmericanNationaStandardsInsute ANSI? Z80.1-2020 Revision of ANSI Z80.1-2015 American National Standard for Ophthalmics Prescription Ophthalmic Lenses Recommendations Secretariat The Vision Council Approved December 22, 2020 Published April 1, 2021 American National Standards Institute, Inc. Copyright American National Standards Institute American requirements for due process, consensus, and other criteria for approval have National been met by the standards developer. Standard Consensus is established when, in the judgement of the ANsl Board of Standards Review, substantial agreement has been reached by directly and views and objections be considered, and that a concerted effort be made towards their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an National StandardsInstitute.Requests for interpretationsshould be page of this standard. CAUTION NOTICE: This American National Standard may be revised or Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Developedby The Accredited Committee Z80 for Ophthalmic Standards - The Vision Council Z80 Secretariat 225 Reinekers Lane Suite 700 Alexandria, VA 22314 Published by The Vision Council 225 Reinekers Lane Suite 700 Alexandria, VA 22314 Copyright @ 2021 by The Vision Council All rights reserved. No partof this publication (with the exception ofAnnexesDandE)maybereproduced inany form, in an electronic retrieval system or otherwise, without prior written permission of the publisher Printed in the United States of America Copyright American National Standards Institute Contents Page Foreword 1 Scope and Purpose 2 Normative References. .2 3 Definitions .3 4 Classification.. .11 5 Optical Requirements 11 6 Mechanical & Durability Requirements... .14 7 Transmittance & Attenuation Requirements . .16 8 Test Methods. .17 9 Markings for Lenses 10 Identification. .26 Annexes A Technical Addendum to Impact Testing.. 28 B Recommended System for Visually Inspecting Lens for Defects .... 30 c The Boxing System of Measurement.. D Optical and Mechanical Tolerances Summary . ..34 E Position of Wear ("As-worn") Definitions. ..36 F Observations on Focimetry Capabilities and Issues.. G Explanation of Prism Tolerances ...39 Bibliography .. Copyright American National Standards Insttute Foreword (This foreword is not part of American National Standard ANSI Z80.1-2020.) Summary of Changes to ANSI Z80.1 for 2020 This 2020 revision represents the most current consensus of experts in this field. The changes from the 2015 standard are the result of a thorough study by the ANSI Z80.1 committee of the relevance and applicability of its contents. Summaryofkeyitemsincludedinthisrevision(2020) The committee reviewed comments and input received from past revisions and sought input from users of the standard. As a result, a number of important revisions weremade: - Methods to address claims in the area of Transmittance were included. Recom- mendationsonstandardizingclaimsforattenuationatgivenwavelengths(such as 400 nm) and products that selectively attenuate specific wavelengths (such as Blue light); - New terms and product classifications, including Power Variation lenses and special