EN ISO 10938:1998

Ophthalmic instruments - Chart projectors (ISO 10938:1998)

Specification of minimum requirements in order to guarantee a sufficient quality of use.

Ophthalmische Instrumente - Sehzeichenprojektoren (ISO 10938:1998)

Diese Internationale Norm legt zusammen mit ISO 15004 Mindestanforderungen und Prüfverfahren für Projektorsysteme - bestehend aus einem optischen Projektor und einem Schirm - zur Projektion von Sehzeichen fest, die zur Bestimmung der Sehschärfe, des Refraktionßustandes und binokularer Funktionen des menschlichen Auges benutzt werden. Wenn Unterschiede vorliegen, hat diese Internationale Norm Vorrang vor ISO 15004.

Instruments ophtalmiques - Projecteurs d'optotypes (ISO 10938:1998)

La présente Norme internationale détermine, parallèlement l'ISO 15004, les prescriptions minimales et les méthodes d'essai relatives aux appareils projecteurs d'optotypes destinés à la projection de tests permettant de déterminer l'acuité visuelle, ainsi que l'état de la réfraction et des fonctions binoculaires de l'oeil humain. Un appareil projecteur d'optotypes comprend un projecteur optique et un écran. La présente Norme internationale a la priorité sur l'ISO 15004, lorsque des différences existent.

Oftalmični instrumenti - Projektorji za optotipe (ISO 10938:1998)

General Information

• Status: Withdrawn
• Publication Date: 14-May-1998
• Withdrawal Date: 18-Oct-2016
• ICS: 11.040.70 - Ophthalmic equipment
• Technical Committee: CEN/TC 170 - Ophthalmic optics
• Drafting Committee: CEN/TC 170 - Ophthalmic optics
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 19-Oct-2016
• Ref Project: SIST EN ISO 10938:2000 - Ophthalmic instruments - Chart projectors (ISO 10938:1998)

Relations

• Replaced By: EN ISO 10938:2016 - Ophthalmic optics - Chart displays for visual acuity measurement - Printed, projected and electronic (ISO 10938:2016)
• Effective Date: 26-Oct-2016

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 10938:2000
01-januar-2000
2IWDOPLþQLLQVWUXPHQWL3URMHNWRUML]DRSWRWLSH,62
Ophthalmic instruments - Chart projectors (ISO 10938:1998)
Ophthalmische Instrumente - Sehzeichenprojektoren (ISO 10938:1998)
Instruments ophtalmiques - Projecteurs d'optotypes (ISO 10938:1998)
Ta slovenski standard je istoveten z: EN ISO 10938:1998
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
SIST EN ISO 10938:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10938:2000

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SIST EN ISO 10938:2000
INTERNATIONAL ISO
STANDARD 10938
First edition
1998-05-15
Ophthalmic instruments — Chart projectors
Instruments ophtalmiques — Projecteurs d'optotypes
A
Reference number
ISO 10938:1998(E)

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SIST EN ISO 10938:2000
ISO 10938:1998(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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75% of the member bodies casting
a vote.
International Standard ISO 10938 was prepared by Techncial Committee
ISO/TC 172, Optics and optical instruments, Subcommittee SC 7,
Ophthalmic optics and instruments.
©  ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
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SIST EN ISO 10938:2000
©
INTERNATIONAL STANDARD  ISO ISO 10938:1998(E)
Ophthalmic instruments — Chart projectors
1  Scope
This International Standard, together with ISO 15004, specifies minimum requirements and test methods for chart
projector systems, including an optical projector and a screen, for the projection of targets used for the determination of
visual acuity, the refractive status and the binocular functions of the human eye.
This International Standard takes precedence over ISO 15004, if differences exist.
2  Normative references
The following standards contain provision which, through reference in this text, constitute provision of this International
Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties
to agreements based on this International Standard are encourage to investigate the possibility of applying the most
recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
ISO 8596:1994 Ophthalmic optics - Visual acuity testing - Standard optotype and its presentation
ISO 8597:1994 Optics and optical instruments - Visual acuity testing - Method of correlating optotypes
ISO 15004:1997 Ophthalmic instruments - Fundamental requirements and test methods
IEC 60601-1:1988 Medical electrical equipment - Part 1: General requirements for safety
3  Requirements
3.1  General
The chart projector shall conform to the requirements specified in ISO 15004.
3.2  Functional requirements
The chart projector shall conform to the requirements specified in 3.2.1 to 3.2.5.
NOTE - Verification of these requirements is described in clause 4.
3.2.1  Optotypes
If designed to be used for certification purposes, the chart projector shall be equipped either with the standard optotype
according to ISO 8596 in the grades specified therein, or with optotypes which are correlated to the standard optotype
by the method described in ISO 8597.
1

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SIST EN ISO 10938:2000
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