ANSI Z80.17-2013 Ophthalmics - Focimeters (VC)《焦距计》.pdf

1、American National Standardfor Ophthalmics FocimetersANSI Z80.17-2013ANSIZ80.17-2013ANSIZ80.17-2013(Revision ofANSI Z80.17-2008)American National Standardfor Ophthalmics FocimetersSecretariatThe Vision CouncilApproved March 14, 2013American National Standards Institute, Inc.Approval of an American Na

2、tional Standard requires review by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen met by the standards developer.Consensus is established when, in the judgement of the ANSI Board ofStandards Review, substantial agreement has been reached by directly an

3、dmaterially affected interests. Substantial agreement means much more thana simple majority, but not necessarily unanimity. Consensus requires that allviews and objections be considered, and that a concerted effort be madetowards their resolution.The use of American National Standards is completely

4、voluntary; theirexistence does not in any respect preclude anyone, whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American National Standards Institute does not develop standards a

5、ndwill 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 National Standard in the name of the AmericanNational Standards Institute. Requests for interpretations should beaddresse

6、d 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 procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, orwit

7、hdraw this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byThe Vision Council225 Reinekers Lane, Suite 700Alexandria, VA 22314Copyright 2013 by The

8、 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 the publisher.Printed in the United States of AmericaDeveloped byThe Accredited Committee Z80 for Ophthalmic Standards -The

9、Vision CouncilZ80 Secretariat225 Reinekers Lane, Suite 700Alexandria, VA 22314iContentsPageForeword ii1 Scope . 12 Normative References 13 Definitions. 14 Design requirements and recommendations for general purpose focimeters 45 Accuracy Requirements . 66 Testing 97 Design requirements and recommend

10、ations for test lenses 13Tables1 Tolerances of measured vertex power for continuously indicating instruments 72 Tolerances of measured prismatic power for continuously indicating instruments 73 Permissible deviations of measured vertex power reading from thenominal value of the test lenses for digit

11、ally rounding instruments 84 Permissible deviations of measured prismatic power reading from thenominal value of the test lenses for digitally rounding instruments 85 Cylinder power and cylinder axis requirements for focimeters thatmeasure sphere, cylinder and axis simultaneously 96 Tolerance on rep

12、eatability of cylinder axis measurements for0.25 D cylinder (degrees) . 97 Design range for the standard test lenses 148 Tolerances for spherical test lenses. 149 Tolerances for prismatic test lenses. 15Figures1 Permissible movement of the adjusting rail 52 Example of a lens support for spectacle le

13、nses in cross section . 63 Test lens for verifying cylinder power and cylinder axis requirementsfor focimeters that measure sphere, cylinder and axis simultaneously. 16AnnexA Manufacture of test lenses for focimeters. 17iiForeword (This foreword is not part of American National Standard ANSI Z80.17-

14、2013.)This standard was developed by a group of experts under the direction of the ANSIInstrument subcommittee chair, William L. Brown, O.D., Ph.D. This standard definesthe requirement for devices that measure the sphere and cylindrical vertex power,prismatic power and axis for spectacle and contact

15、 lenses. Accuracy requirementsfor tolerances or deviation of readings are also defined.In this revised standard, a method is added for checking the cylinder power and cylin-der axis requirements for focimeters that measure sphere, cylinder and axis simulta-neously.Suggestions for improvement of this

16、 standard will be welcome. Comments 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 Optics, Z80. Committee approval of this stan-dard does not ne

17、cessarily imply that all committee members voted for its approval.At the time it approved this standard, the Z80 Committee had the following members:Thomas White, M.D., ChairmanQuido Cappelli, Vice-ChairmanRobert Rosenberg, O.D., SecretaryDaniel Torgersen, SecretariatOrganization Represented Name of

18、 RepresentativeAdvance Medical Technologies Association Paul LudingtonRichard Courtney (Alt.)Glenn Davies (Alt.)Bernie Liebler (Alt.)American Academy of Ophthalmology . Tom WhiteCarl Tubbs (Alt.)Pradeep Ramulu (Alt.)Shannon Curtis (Alt.)American Academy of Optometry. David S. LoshinAmerican Ceramic

19、Society . Lyle RubinHerbert Hoover (Alt.)American Glaucoma Society Steven Gedde Douglass Rhee (Alt.)American Optometric Association Karl CitekRobert Rosenberg (Alt.)William Benjamin (Alt.)William Brown (Alt.)American Society of Cataract and Refractive Surgery . Stephen KlyceJack Holladay (Alt.)Assoc

20、iation for Research in Vision drf= 1 x10-5meters drb = 1 x10-5meters dt = 3 x 10-6meters dn = 3 x 10-5D 9101-1.5224916.02-dF3-5-2bvrf .4 D 2.0101-1.522491.02dF5-5-2bvrb D9.01031-1.522491.5224916.020.00541-15224915.00dF4-5-2bvn 2D5.11031.5224916.02dF4-6-2bvt dF 4.9 2.0 9.0 5.1 0.005 Dbv-32-52-42-42 This master test lens therefore has a power of 15.00 0.005 D, which meets the requirements of 7.2.1.