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 document applies to printed, projected, and electronic displays of high-contrast text that are designed for assessment and measurement of near reading acuity under photopic conditions.
The definitions and requirements of this document apply to the Latin alphabet.
Augenoptik und ophthalmische Instrumente - Nahsehschärfetafeln (ISO 7921:2024)
Dieses Dokument ist anwendbar für gedruckte, projizierte und elektronische Anzeigen von kontrastreichem Text, die für die Beurteilung und Messung der Nahlesesehschärfe unter photopischen Bedingungen (Tageslichtbedingungen) vorgesehen sind.
Die Definitionen und Anforderungen dieses Dokuments sind anwendbar für das Lateinische Alphabet.
Optique et instruments ophtalmiques - Tableaux d’optotypes utilisés pour la mesure 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)
General Information
Standards Content (Sample)
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.
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oSIST prEN ISO 7921:2023
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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
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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
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STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
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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
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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 .
...
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