SIST EN ISO 10938:2017

SLOVENSKI STANDARD
SIST EN ISO 10938:2017
01-januar-2017
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SIST EN ISO 10938:2000
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Ophthalmic optics - Chart displays for visual acuity measurements - Printed, projected
and electronic (ISO 10938:2016)
Augenoptik - Anzeigetafeln für die Sehprüfung - Gedruckt, projiziert und elektronisch
(ISO 10938:2016)
Optique ophtalmique - Affichages d'échelles de mesure d'acuité visuelle - Imprimé,
projeté ou électronique (ISO 10938:2016)
Ta slovenski standard je istoveten z: EN ISO 10938:2016
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
SIST EN ISO 10938:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10938:2017

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SIST EN ISO 10938:2017


EN ISO 10938
EUROPEAN STANDARD

NORME EUROPÉENNE

October 2016
EUROPÄISCHE NORM
ICS 11.040.70 Supersedes EN ISO 10938:1998
English Version

Ophthalmic optics - Chart displays for visual acuity
measurement - Printed, projected and electronic (ISO
10938:2016)
Optique ophtalmique - Dispositifs d'affichage de Augenoptik - Anzeigetafeln für die Sehprüfung -
tableaux d'optotypes destinés au mesurage de l'acuité Gedruckt, projiziert und elektronisch (ISO
visuelle - Tableaux d'optotypes imprimés, projetés et 10938:2016)
affichés par des moyens électroniques (ISO
10938:2016)
This European Standard was approved by CEN on 12 September 2016.

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 references
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 CEN 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 Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10938:2016 E
worldwide for CEN national Members.

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SIST EN ISO 10938:2017
EN ISO 10938:2016 (E)
Contents Page
European foreword . 3
2

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SIST EN ISO 10938:2017
EN ISO 10938:2016 (E)
European foreword
This document (EN ISO 10938:2016) 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 publication of an
identical text or by endorsement, at the latest by April 2017, and conflicting national standards shall be
withdrawn at the latest by April 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 10938:1998.
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, Cyprus, 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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 10938:2016 has been approved by CEN as EN ISO 10938:2016 without any modification.
3

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SIST EN ISO 10938:2017

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SIST EN ISO 10938:2017
INTERNATIONAL ISO
STANDARD 10938
Second edition
2016-10-01
Ophthalmic optics — Chart displays
for visual acuity measurement —
Printed, projected and electronic
Optique ophtalmique — Dispositifs d’affichage de tableaux
d’optotypes destinés au mesurage de l’acuité visuelle — Tableaux
d’optotypes imprimés, projetés et affichés par des moyens
électroniques
Reference number
ISO 10938:2016(E)
©
ISO 2016

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SIST EN ISO 10938:2017
ISO 10938:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved

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SIST EN ISO 10938:2017
ISO 10938:2016(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Optotypes . . 2
4.1.1 Size of optotypes . 2
4.1.2 Luminance of background . 2
4.1.3 Contrast of optotypes . 3
4.1.4 Quality of presentation . 3
4.1.5 Resolution . 3
4.2 Requirements specific to optically projected displays . 3
4.2.1 Focus range . 3
4.2.2 Projector screens . 3
4.3 Requirements specific to printed charts . 3
4.4 Range of compliance . 3
4.5 Conformity to ISO 15004-1 . 4
5 Test methods . 4
5.1 Type tests . 4
5.2 Conformity . 4
5.3 Resolution . 4
6 Accompanying documents . 4
7 Marking, labelling and packaging . 5
Bibliography . 6
© ISO 2016 – All rights reserved iii

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SIST EN ISO 10938:2017
ISO 10938:2016(E)

Foreword
ISO (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 technical 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 with 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 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 rights. 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 this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 172, Optics and photonics, Subcommittee SC 7,
Ophthalmic optics and instruments.
This second edition cancels and replaces the first edition (ISO 10938:1998), which has been technically
revised.
iv © ISO 2016 – All rights reserved

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