SIST EN ISO 7921:2024
(Main)Ophthalmic optics and instruments - Near reading charts (ISO 7921:2024)
Ophthalmic optics and instruments - Near reading charts (ISO 7921:2024)
This International Standard applies to displays of high-contrast text that are designed for general near vision assessment. It does not apply to measurement systems designed for specialized testing of near visual acuity, e.g., low vision or low contrast charts or those intended for transillumination, or electronically generated systems.
Augenoptik und ophthalmische Instrumente - Nahsehschärfetafeln (ISO 7921:2024)
Dieses Dokument gilt für gedruckte, projizierte und elektronische Anzeigen von kontrastreichem Text, die für die Beurteilung und Messung der Leseschärfe unter photopischen Bedingungen (Tageslichtbedingungen) vorgesehen sind.
Die Definitionen und Anforderungen dieses Dokuments gelten für das Lateinische Alphabet.
Optique et instruments ophtalmiques - Tableaux d’optotypes utilisés pour le mesurage de l’acuité de lecture en vision de près (ISO 7921:2024)
Le présent document s’applique aux dispositifs d’affichage de textes à contraste élevé imprimés, projetés et affichés par des moyens électroniques qui sont conçus pour évaluer et mesurer l’acuité de lecture en vision de près dans des conditions photopiques.
Les définitions et les exigences figurant dans le présent document s’appliquent à l’alphabet latin.
Očesna optika in instrumenti - Tablice za preverjanje bližinskega vida (ISO 7921:2024)
Ta mednarodni standard se uporablja za prikaze visokoločljivega besedila, ki so zasnovani za splošno preverjanje bližinskega vida. Ta standard se ne uporablja za merilne sisteme, ki so zasnovani za posebno preskušanje ostrine bližinskega vida, npr. tablice za preverjanje slabega vida oziroma ostrine vida ali tiste, namenjene za sisteme s presvetlitvijo ali elektronsko ustvarjene sisteme.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 7921:2024
01-maj-2024
Očesna optika in instrumenti - Tablice za preverjanje bližinskega vida (ISO
7921:2024)
Ophthalmic optics and instruments - Near reading charts (ISO 7921:2024)
Augenoptik und ophthalmische Instrumente - Nahsehschärfetafeln (ISO 7921:2024)
Optique et instruments ophtalmiques - Tableaux d’optotypes utilisés pour le mesurage
de l’acuité de lecture en vision de près (ISO 7921:2024)
Ta slovenski standard je istoveten z: EN ISO 7921:2024
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
SIST EN ISO 7921:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 7921:2024
---------------------- Page: 2 ----------------------
SIST EN ISO 7921:2024
EN ISO 7921
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2024
EUROPÄISCHE NORM
ICS 11.040.70
English Version
Ophthalmic optics and instruments - Near reading charts
(ISO 7921:2024)
Optique et instruments ophtalmiques - Tableaux Augenoptik und ophthalmische Instrumente -
d'optotypes utilisés pour la mesure de l'acuité de Nahsehschärfetafeln (ISO 7921:2024)
lecture en vision de près (ISO 7921:2024)
This European Standard was approved by CEN on 9 February 2024.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7921:2024 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 7921:2024
EN ISO 7921:2024 (E)
Contents Page
European foreword . 3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 7921:2024
EN ISO 7921:2024 (E)
European foreword
This document (EN ISO 7921:2024) 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 August 2024, and conflicting national standards shall
be withdrawn at the latest by August 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 7921:2024 has been approved by CEN as EN ISO 7921:2024 without any modification.
3
---------------------- Page: 5 ----------------------
SIST EN ISO 7921:2024
---------------------- Page: 6 ----------------------
SIST EN ISO 7921:2024
International
Standard
ISO 7921
First edition
Ophthalmic optics and
2024-02
instruments — Near reading charts
Optique et instruments ophtalmiques — Tableaux
...
SLOVENSKI STANDARD
oSIST prEN ISO 7921:2023
01-junij-2023
Očesna optika in instrumenti - Tablice za preverjanje bližinskega vida (ISO/DIS
7921:2023)
Ophthalmic optics and instruments - Near reading charts (ISO/DIS 7921:2023)
Augenoptik und ophthalmische Instrumente - Nahsehschärfetafeln (ISO/DIS 7921:2023)
Optique et instruments ophtalmiques - Tableaux d’optotypes utilisés en vision de près
(ISO/DIS 7921:2023)
Ta slovenski standard je istoveten z: prEN ISO 7921
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
oSIST prEN ISO 7921:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 7921:2023
---------------------- Page: 2 ----------------------
oSIST prEN ISO 7921:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 7921
ISO/TC 172/SC 7 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-04-11 2023-07-04
Ophthalmic optics and instruments — Near vision charts
ICS: 11.040.70
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 7921:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
---------------------- Page: 3 ----------------------
oSIST prEN ISO 7921:2023
ISO/DIS 7921:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 7921
ISO/TC 172/SC 7 Secretariat: DIN
Voting begins on: Voting terminates on:
Ophthalmic optics and instruments — Near vision charts
ICS: 11.040.70
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: +41 22 749 01 11
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: copyright@iso.org
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 7921:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
© ISO 2023 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
---------------------- Page: 4 ----------------------
oSIST prEN ISO 7921:2023
ISO/DIS 7921:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.