ISO 7921:2024

Ophthalmic optics and instruments — Near reading charts

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.

Optique et instruments ophtalmiques — Tableaux d’optotypes utilisés pour la mesure de l’acuité de lecture en vision de près

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.

General Information

• Status: Published
• Publication Date: 08-Feb-2024
• ICS: 11.040.70 - Ophthalmic equipment
• Technical Committee: ISO/TC 172/SC 7 - Ophthalmic optics and instruments
• Drafting Committee: ISO/TC 172/SC 7 - Ophthalmic optics and instruments
• Current Stage: 6060 - International Standard published
• Start Date: 09-Feb-2024
• Due Date: 14-Sep-2024
• Completion Date: 09-Feb-2024

Relations

• Consolidates: ISO 21782-5:2021 - Electrically propelled road vehicles — Test specification for electric propulsion components — Part 5: Operating load testing of the motor system
• Effective Date: 29-Oct-2022

Standards Content (Sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 7921
ISO/TC 172/SC 7
Ophthalmic optics and instruments —
Secretariat: DIN
Near reading charts
Voting begins on:
2023-11-13
Voting terminates on:
2024-01-08
ISO/CEN PARALLEL PROCESSING
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 7921:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 7921:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 7921
ISO/TC 172/SC 7
Ophthalmic optics and instruments —
Secretariat: DIN
Near reading charts
Voting begins on:
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
ISO/CEN PARALLEL PROCESSING
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 7921:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 7921:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 3
5 Test methods . 5
5.1 Type tests . 5
5.2 Conformity . 5
6 Accompanying documents . .5
7 Marking . . 6
Annex A (normative) Clinical application of near reading acuity notations .7
Bibliography .
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ISO/FDIS 7921:2023(E) .
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ISO/TC 172/SC 7
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Secretariat: DIN
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Date: 2023-10-14xx
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Ophthalmic optics and instruments — Near reading charts
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ISO/FDIS 7921:2023(E)
Formatted: Font: 11 pt, Bold
Formatted: Font: Bold
Formatted: Left: 1.9 cm, Right: 1.9 cm, Bottom: 1 cm,
© ISO 2023
Gutter: 0 cm, Header distance from edge: 1.27 cm,
Footer distance from edge: 0.5 cm
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical,
Commented [eXtyles1]: The reference is to a withdrawn
including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can
standard which has been replaced
be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO 20344, Personal protective equipment — Test methods
for footwear
ISO copyright office
CP 401 • Ch. de Blandonnet 8
Formatted: Default Paragraph Font
CH-1214 Vernier, Geneva
Formatted: Default Paragraph Font
Phone: + 41 22 749 01 11
EmailE-mail: [e-mail] Formatted: French (France)
Website: www.iso.orgwww.iso.org
Formatted: French (France)
Formatted: French (France)
Published in Switzerland
Formatted: Font: 11 pt
Formatted: Space After: 0 pt, Line spacing: single
ii © ISO 2023 – All rights reserved
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 7921:2023(E)
Formatted: Font: 11 pt, Bold
Formatted: Font: Bold
Formatted: Left
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 4
5 Test methods . 6
5.1 Type tests . 6
5.2 Conformity . 6
6 Accompanying documents . 6
7 Marking . 7
Annex A (normative) Clinical applicati
...