SIST EN ISO 16321-1:2022

Eye and face protection for occupational use - Part 1: General requirements (ISO 16321-1:2021)

This document specifies general requirements for eye and face protectors. These protectors are intended to provide protection for the eyes and faces of persons against one or more common occupational hazards such as impacts from flying particles and fragments, optical radiation, dusts, splashing liquids, molten metals, heat, flame, hot solids, harmful gases, vapours and aerosols.
Additional requirements for eye and face protectors used during welding and related techniques and for mesh protectors are given in ISO 16321-2 and ISO 16321-3, respectively. ISO 16321-4 provides requirements and guidance on protectors against biological hazards1).
This document applies to:
— all plano as well as corrective and prescription lensed protectors and components;
— those eye and face protectors used for occupational-type tasks that are performed similarly to an occupation, e.g. "do-it-yourself";
— those eye and face protectors used in educational establishments.
This document does not apply to:
— protectors specifically intended for protection against only solar radiation and used in non- occupational environments for which the ISO 12312 series applies;
— protectors for medically prescribed applications (not occupational), e.g. eye protection for severe dry eye, tints prescribed for medical conditions;
— patient eye protectors during diagnosis or treatment (e.g. ISO/TR 22463);
— protectors for use during medical or e.g. aesthetic applications, e.g. intense light sources (ILS) for which the ISO 12609 series applies;
— protectors specifically intended for sports for which the ISO 18527 series applies;
— laser protectors;
— face protectors intended for live-working to protect against short-circuit electric arcs for which IEC 62819 applies;
— protectors intended to protect against ionizing radiation, e.g. X-rays, for which IEC 61331-3 applies.
1) In preparation.

Augen- und Gesichtsschutz für berufliche Anwendungen - Teil 1: Allgemeine Anforderungen (ISO 16321-1:2021)

Dieses Dokument legt allgemeine Anforderungen an Augen- und Gesichtsschutzgeräte fest. Diese Schutz-geräte sind dazu vorgesehen, die Augen und das Gesicht von Personen vor einer oder mehreren typischen beruflichen Gefährdungen, wie z. B. Aufprall von herumfliegenden Teilchen und Bruchstücken, optischer Strahlung, Staub, Spritzern von Flüssigkeiten, geschmolzenem Metall, Hitze, Flammen, heißen Festkörpern, schädlichen Gasen, Dämpfen und Aerosolen, zu schützen.
Zusätzliche Anforderungen an Augen- und Gesichtsschutzgeräte zur Verwendung beim Schweißen und verwandten technischen Verfahren sowie an Schutzgeräte aus Gewebe sind in ISO 16321-2 bzw. ISO 16321-3 enthalten.
Dieses Dokument gilt für:
- alle Plan-Sichtscheiben sowie Schutzgeräte in Form von Korrektionssichtscheiben (en: corrective lenses) und Korrektionssichtscheiben (en: prescription lenses) und deren Komponenten;
- diejenigen Augen- und Gesichtsschutzgeräte, die bei der Ausübung von Aufgaben des beruflichen Typs, z. B. Heimwerken, angewendet werden, die ähnlich einem Beruf ausgeführt werden;
- diejenigen Augen- und Gesichtsschutzgeräte, die in Bildungseinrichtungen angewendet werden.
Dieses Dokument gilt nicht für:
- Schutzgeräte, die speziell für den Schutz nur gegen Sonnenstrahlung und nichtberufliche Umgebungen vorgesehen sind, für welche die Normenreihe ISO 12312 gilt;
- Schutzgeräte für medizinisch verschriebene (nicht berufliche) Anwendungen; z. B. Augenschutz gegen trockene Augen, medizinisch verschriebene Tönungen;
- Schutzgeräte während Diagnose oder Behandlung von Patienten (z. B. ISO/TR 22463);
- Schutzgeräte, die für die Nutzung bei medizinischen oder z. B. ästhetischen Anwendungen vorgesehen sind, z. B. ILS-Anwendungen, für welche die Normenreihe ISO 12609 gilt;
- Schutzgeräte, die speziell für sportliche Aktivitäten vorgesehen sind, für welche die Normenreihe ISO 18527 gilt;
- Laserschutzgeräte;
- Gesichtsschutzgeräte, die bei Arbeiten unter Spannung zum Schutz gegen Störlichtbögen vorgesehen sind, für welche IEC 62819 gilt;
- Schutzgeräte, die zum Schutz gegen ionisierende Strahlung vorgesehen sind, z. B. Röntgenstrahlung für welche IEC 61331-3 gilt.

Protection des yeux et du visage à usage professionnel - Partie 1 : Exigences générales (ISO 16321-1:2021)

Le présent document spécifie les exigences générales relatives aux protecteurs des yeux et du visage. Ces protecteurs sont destinés à assurer une protection des yeux et du visage de personnes contre les risques professionnels courants, tels que les impacts de particules et fragments projetés, le rayonnement optique, les poussières, les projections de liquides, les métaux fondus, la chaleur, les flammes, les solides chauds et les gaz, vapeurs et aérosols nocifs.
Les normes ISO 16321-2 et ISO 16321-3 définissent des exigences supplémentaires pour les protecteurs des yeux et du visage utilisés au cours d'opérations de soudage et de techniques connexes, ainsi que pour les protecteurs grillagés. L'ISO 16321-4 fournit des exigences et des recommandations relatives aux protecteurs contre les risques biologiques.1)
Le présent document s'applique:
— à tous les protecteurs équipés de verres non correcteurs ainsi que ceux équipés de verres correcteurs et de spécification, et à leurs composants;
— aux protecteurs des yeux et du visage utilisés pour des tâches de type professionnel qui sont exécutées de la même manière que dans un cadre professionnel, par exemple le bricolage;
— aux protecteurs des yeux et du visage utilisés dans les établissements de formation.
Le présent document ne s'applique pas:
— aux protecteurs spécifiquement conçus pour assurer une protection uniquement contre le rayonnement solaire et qui sont utilisés dans des environnements non professionnels, couverts par la série ISO 12312;
— aux protecteurs destinés à des applications couvertes par une ordonnance médicale (à caractère non professionnel), par exemple protection de l'œil en cas de sécheresse oculaire sévère, verres teintés spécifiés pour raisons médicales;
— aux protecteurs de l'œil utilisés chez les patients au cours d'un diagnostic ou d'un traitement (par exemple l'ISO/TR 22463);
— aux protecteurs destinés à être utilisés au cours d'applications médicales ou esthétiques, par exemple sources lumineuses intenses (ILS) couvertes par la série de normes ISO 12609;
— aux protecteurs spécifiquement destinés à des sports, lesquels sont couverts par la série de normes ISO 18527;
— aux protecteurs contre les lasers;
— aux protecteurs du visage conçus pour les travaux sous tension afin d'assurer une protection contre les arcs électriques provoqués par des courts-circuits, lesquels sont couverts par l'IEC 62819;
— aux protecteurs conçus pour assurer une protection contre les rayonnements ionisants, par exemple les rayons X, lesquels sont couverts par l'IEC 61331-3.
1)En cours d'élaboration.

Zaščita za oči in obraz za poklicno uporabo - 1. del: Splošne zahteve (ISO 16321-1:2021)

Ta dokument določa splošne zahteve za ščitnike, zasnovane za zaščito oči in obraza oseb pred pogostimi poklicnimi tveganji, kot so udarci letečih delcev in drobcev, optično sevanje, prah, brizgajoči materiali, staljene kovine, vročina, plamen, vroče trdne snovi, škodljivi plini, hlapi in aerosoli.
Dodatne zahteve za ščitnike, ki se uporabljajo med varjenjem in sorodnimi tehnikami, ter za mrežne ščitnike so podane v standardih ISO 16321-2 in ISO 16321-3.
Ta dokument se uporablja za vse ščitnike za afokalne (brez korekcije) leče in leče na recept ter njihove komponente.
Dokument se uporablja tudi za tiste izdelke za zaščito oči in obraza, ki se uporabljajo za naloge, podobne poklicnim, ki pa se ne izvajajo v okviru poklica, npr. »sam svoj mojster«.
Ta dokument se ne uporablja za:
– sončna očala za splošno uporabo, za katera se uporablja standard ISO 12312-1;
– ščitnike za zdravniško predpisano uporabo (nepoklicno), npr. zaščita za oči za zelo suho oko, obarvanosti, predpisane za zdravstvene težave;
– ščitniki za nadzor izpostavljenosti oči pacientov med diagnozo ali zdravljenjem (npr.
ISO/DTR 22463);
– ščitniki za uporabo v medicini in kozmetiki za varovanje pred intenzivnimi viri svetlobe (ILS), za katere velja skupina standardov ISO 12609;
– ščitniki za neposredno opazovanje sonca, npr. za opazovanje sončevega mrka, za katere se uporablja standard ISO 12312-2;
– ščitniki, posebej zasnovani za šport, za katere velja skupina standardov ISO 18527;
– ščitniki za varovanje pred laserskimi žarki, za katere se uporablja standard ISO 19818;
– ščitniki za obraz, namenjeni delu pod napetostjo, za zaščito pred električnim oblokom pri kratkih stikih, za katerega se uporablja standard IEC 62819;
– zaščitne naprave, namenjene zaščiti pred ionizirajočim sevanjem, za katere se uporablja standard IEC 61331-3.

General Information

• Status: Published
• Public Enquiry End Date: 19-Jul-2018
• Publication Date: 23-Aug-2022
• ICS: 13.340.20 - Head protective equipment
• Technical Committee: OVP - Personal protecting equipment
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 20-May-2022
• Due Date: 25-Jul-2022
• Completion Date: 24-Aug-2022
• Directive: 2016/425 - Regulation (EU) 2016/425 of the European Parliament and of the Council of 9 March 2016 on personal protective equipment and repealing Council Directive 89/686/EEC
• Mandate: M/571 - COMMISSION IMPLEMENTING DECISION of 19.11.2020 on a standardisation request to the European Committee for Standardization and the European Committee for Electrotechnical Standardization as regards personal protective equipment in support of Regulation (EU) 2016/425 of the European Parliament and of the Council
• Mandate: M/571 AMD 1 - Personal Protective Equipement
• Ref Project: EN ISO 16321-1:2022 - Eye and face protection for occupational use - Part 1: General requirements (ISO 16321-1:2021)

Relations

• Replaces: SIST EN 169:2003 - Personal eye-protection - Filters for welding and related techniques - Transmittance requirements and recommended use
• Effective Date: 01-Sep-2022
• Replaces: SIST EN 379:2003+A1:2009 - Personal eye-protection - Automatic welding filters
• Effective Date: 01-Sep-2022
• Replaces: SIST EN 171:2002 - Personal eye-protection - Infrared filters - Transmittance requirements and recommended use
• Effective Date: 01-Sep-2022
• Replaces: SIST EN 166:2002 - Personal eye-protection - Specifications
• Effective Date: 01-Sep-2022
• Replaces: SIST EN 172:1996 - Personal eye protection - Sunglare filters for industrial use
• Effective Date: 01-Sep-2022
• Replaces: SIST EN 172:1996/A1:2000 - Personal eye-protection - Sunglare filters for industrial use
• Effective Date: 01-Sep-2022
• Replaces: SIST EN 172:1996/A2:2001 - Personal eye protection - Sunglare filters for industrial use
• Effective Date: 01-Sep-2022
• Replaces: SIST EN 170:2003 - Personal eye-protection - Ultraviolet filters - Transmittance requirements and recommended use
• Effective Date: 01-Sep-2022
• Amended By: SIST EN ISO 16321-1:2022/A1:2025 - Eye and face protection for occupational use - Part 1: General requirements - Amendment 1 (ISO 16321-1:2021/Amd 1:2024)
• Effective Date: 01-Jul-2025

Overview - EN ISO 16321-1:2022 (Eye and face protection, Part 1)

EN ISO 16321-1:2022 (ISO 16321-1:2021) is the CEN-adopted European standard that sets general requirements for occupational eye and face protectors. It replaces several older EN standards (e.g., EN 166, EN 169, EN 170, EN 171, EN 172, EN 379) and provides a harmonised framework for design, performance, testing and marking of protectors used against common workplace hazards such as impacts, optical radiation, dust, splashes, molten metal, heat, flame and aerosols. The standard applies to plano, corrective and prescription lensed protectors, do‑it‑yourself tasks, and educational settings - but excludes items intended solely for solar, medical-only, sports, laser, live‑working arc, or ionizing radiation protections.

Key topics and technical requirements

EN ISO 16321-1 covers the essential technical aspects manufacturers, test laboratories and safety professionals need to address:

• General design and physiological compatibility - materials, surface finish and wearer comfort, suitability for expected ambient temperatures, and ease of cleaning/disinfection.
• Geometrical optical requirements - field of view, refractive and prismatic power for plano and prescription lenses, positioning of mounted lenses and ready‑to‑wear near‑vision options.
• Physical optical requirements - detection of signal lights, luminous transmittance, and specific filter classes (ultraviolet, infrared, sunglare and specialty glass‑blowing filters). Also addresses uniformity, scattered light and optional anti‑reflective coatings.
• Mechanical and physical protection - areas to be protected, lateral protection, headbands/harnesses, material quality, and fundamental impact performance criteria for complete protectors.
• Marking, user information and ergonomics - mandatory instructions, identification markings, adaptation to user morphology and limits on user impediment.
• Optional enhanced performance - provisions for higher optical performance and multi‑risk protection.

Practical applications and users

Who benefits from this standard:

• PPE manufacturers and designers - to develop compliant eye and face protectors and select materials, lens filters and harness systems.
• Occupational safety professionals and procurement teams - to specify appropriate protectors for workplaces (manufacturing, construction, laboratories, glass‑blowing, welding - noting welding-specific requirements are in ISO 16321-2).
• Test laboratories and certification bodies - to verify performance, marking and conformity (including presumption of conformity with EU Regulation 2016/425 where applicable).
• Educators and DIY product suppliers - for selecting suitable protectors used in training and non‑professional tasks.

Related standards

• ISO 16321-2 (welding and related techniques)
• ISO 16321-3 (mesh protectors)
• ISO 16321-4 (protectors against biological hazards - in preparation)
• Referenced optical and testing standards (e.g., ISO 4007, ISO 11664 series, ISO 18526 series)

EN ISO 16321-1:2022 is the primary reference for general eye and face PPE performance and is essential for anyone designing, specifying or certifying protective eyewear for occupational use.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2022
Nadomešča:
SIST EN 166:2002
SIST EN 169:2003
SIST EN 170:2003
SIST EN 171:2002
SIST EN 172:1996
SIST EN 172:1996/A1:2000
SIST EN 172:1996/A2:2001
SIST EN 379:2003+A1:2009
Zaščita za oči in obraz za poklicno uporabo - 1. del: Splošne zahteve (ISO 16321-
1:2021)
Eye and face protection for occupational use - Part 1: General requirements (ISO 16321-
1:2021)
Augen- und Gesichtsschutz für berufliche Anwendungen - Teil 1: Allgemeine
Anforderungen (ISO 16321-1:2021)
Protection des yeux et du visage à usage professionnel - Partie 1 : Exigences générales
(ISO 16321-1:2021)
Ta slovenski standard je istoveten z: EN ISO 16321-1:2022
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 16321-1
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2022
EUROPÄISCHE NORM
ICS 13.340.20 Supersedes EN 166:2001, EN 169:2002, EN 170:2002,
EN 171:2002, EN 172:1994, EN 379:2003+A1:2009
English Version
Eye and face protection for occupational use - Part 1:
General requirements (ISO 16321-1:2021)
Protection des yeux et du visage à usage professionnel Augen- und Gesichtsschutz für berufliche
- Partie 1: Exigences générales (ISO 16321-1:2021) Anwendungen - Teil 1: Allgemeine Anforderungen (ISO
16321-1:2021)
This European Standard was approved by CEN on 6 November 2020.

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, Turkey 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16321-1:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation 2016/425 aimed to be covered . 5
European foreword
This document (EN ISO 16321-1:2022) has been prepared by Technical Committee ISO/TC 94
"Personal safety -- Personal protective equipment" in collaboration with Technical Committee CEN/TC
85 “Eye protective equipment” the secretariat of which is held by AFNOR.
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 October 2022, and conflicting national standards shall
be withdrawn at the latest by April 2025.
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.
This document supersedes EN 166:2001, EN 169:2002, EN 170:2002, EN 171:2002, EN 172:1994, EN
379:2003+A1:2009.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Regulation 2016/425.
For the relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral
part of this document.
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.
The following referenced documents are indispensable for the application of this document. For
undated references, the latest edition of the referenced document (including any amendments) applies.
For dated references, only the edition cited applies. However, for any use of this document ‘within the
meaning of Annex ZA, the user should always check that any referenced document has not been
superseded and that its relevant contents can still be considered the generally acknowledged state-of-
art.
When an IEC or ISO standard is referred to in the ISO standard text, this shall be understood as a
normative reference to the corresponding EN standard, if available, and otherwise to the dated version
of the ISO or IEC standard, as listed below.
NOTE The way in which these referenced documents are cited in normative requirements determines the
extent (in whole or in part) to which they apply.
Undated normative Clause(s) of the ISO Equivalent dated standard
references in the ISO standard
EN ISO or IEC
standard
ISO 4007 Clause 2 & 3 EN ISO 4007:2018 ISO 4007:2018
ISO 11664-1 Clause 2 & 4.3.1.1 EN ISO 11664-1:2011 ISO 11664-1:2007
ISO 11664-2 Clause 2 & 4.3.1.1 EN ISO 11664-2:2011 ISO 11664-2:2007
ISO 16321-1 Clause 1, 2, & 4.1 EN ISO 16321-1:2020 ISO 16321-1:2020
ISO 18526-1 Clause 2 EN ISO 18526-1:2020 ISO 18526-1:2020
ISO 18526-2 Clause 2 EN ISO 18526-2:2020 ISO 18526-22020
ISO 18526-3 Clause 2 EN ISO 18526-3 :2020 ISO 18526-3:2020
ISO 18526-4 Clause 2, 6.3 & 7 EN ISO 18526-4 :2020 EN ISO 18526-4 :2020
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 16321-1:2021 has been approved by CEN as EN ISO 16321-1:2022 without any
modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Regulation 2016/425 aimed to be covered
This European Standard has been prepared under a Commission’s standardization request M/571  to
provide one voluntary means of conforming to requirements of Regulation 2016/425.
Once this standard is cited in the Official Journal of the European Union under that Regulation
2016/425 compliance with the normative clauses of this standard given in Table ZA.1 confers, within
the limits of the scope of this standard, a presumption of conformity with the corresponding [essential]
requirements of that Regulation 2016/425 and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and
Annex II of Regulation 2016/425
Essential Requirements Clause(s)/sub-clause(s) Remarks/Notes
of Regulation of this EN
1.1.1 Ergonomics 4.3; 7.2
1.1.2 Level and classes of 6.2; 6.3.1; 6.3.2; 6.3.3; 6.3.4; 6.6; ; 7.1;
protection 7.4; 7.10; 7.11; 7.14; 7.15; 7.16; 7.17;
7.18; 7.19; 7.20; 7.21
1.2.1 Absence of risks and other 5.2, 6.1
'inherent' nuisance factors
1.2.1.1 Suitable constituent 4.2
materials
1.2.1.2 Satisfactory surface 4.3
condition of all PPE parts in
contact with the user.
1.2.1.3 Maximum permissible 5.1; 5.2; 5.3; 5.5; 6.1; 6.5; 6.7; 7.3
user impediment
1.3.1 Adaptation of PPE to user 4.3; 4.5; 5.1; 7.2
morphology
1.3.2 Lightness and design strength 4.1; 7.4; 7.5; 7.6; 7.7; 7.8, 7.12
1.4 Manufacturer's instructions 9
and information
2.2 PPE "enclosing" the parts 7.9; 7.13
of the body to be protected
2.3 PPE for the face, eyes and 4.3; 5; 6.1; 6.5; 6.7; 7.9; 7.13
respiratory system
2.9 PPE incorporating components 4.3
which can be adjusted or removed by
the use
2.12 PPE bearing one or more 8
identification markings or
indicators directly or indirectly
relating to health and safety
2.14 "Multi risk" PPE 6; 7 This standard describes
multiple types of risks. The
EHSR is covered by the
appropriate combination of
requirements, associated with
the risks corresponding to the
intended use of the eye/face
protector
3.1.1 Impact caused by falling or ejected 7.1; 7.4; 7.9; 7.10; 7.11 This standard does not cover
objects and collision of parts of the body requirements concerning
with obstacle prevention of injuries caused by
collision of the face with
obstacles.
3.6.1 PPE constituent materials and 6.3.2; 6.6; 7.5; 7.14; 7.19; 7.4; 7.10.2;
other components 7.11.2
3.6.2 Complete PPE ready for use 7.19; 6.3.2
3.9.1Non-ionising radiation 6; 7.1; 8; 9
3.10.2 Protection against cutaneous and 7.15; 7.16; 7.17; 7.18; 7.20
ocular contact
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
INTERNATIONAL ISO
STANDARD 16321-1
First edition
2021-03
Eye and face protection for
occupational use —
Part 1:
General requirements
Protection des yeux et du visage à usage professionnel —
Partie 1: Exigences générales
Reference number
ISO 16321-1:2021(E)
©
ISO 2021
ISO 16321-1:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2021 – All rights reserved

ISO 16321-1:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General requirements for protectors . 2
4.1 Ambient temperatures . 2
4.2 Physiological compatibility . 2
4.3 Construction and adjustment . 3
4.4 Cleaning and/or disinfection . 3
4.5 Headform(s) . 3
4.6 Mandatory and optional requirements . 3
5 Geometrical optical requirements for protectors . 4
5.1 Field of view . 4
5.2 Refractive power and prismatic power for plano lenses . 4
5.2.1 Spherical and cylindrical power . 4
5.2.2 Spatial deviation . 4
5.2.3 Prismatic power for unmounted plano lenses covering one eye . 5
5.2.4 Prism imbalance of complete eye protectors or plano lenses covering both eyes . 5
5.3 Mounted prescription lenses . 5
5.3.1 Optical . 5
5.3.2 Positioning . 5
5.4 Single-vision ready-to-wear near-vision lenses (lenses with positive spherical power) . 5
5.5 Enhanced optical performance (optional requirement). 5
6 Physical optical requirements for protectors . 6
6.1 Detection of signal lights . 6
6.2 Luminous transmittance of lenses without deliberate filter action . 6
6.3 Specific requirements for different types of filter . 6
6.3.1 Ultraviolet protective filters . 6
6.3.2 Infrared protective filters . 7
6.3.3 Sunglare filters for occupational use . 9
6.3.4 Filters for use in glass blowing .11
6.4 Uniformity of luminous transmittance and transmittance matching .12
6.5 Scattered light .12
6.6 Frame transmittance .12
6.7 Anti-reflective coated lenses (optional requirement) .13
7 Physical and mechanical requirements for protectors .13
7.1 Area to be protected .13
7.1.1 General.13
7.1.2 Area to be protected by eye protectors .18
7.1.3 Area to be protected by face protectors .18
7.1.4 Lateral protection .18
7.2 Headbands and harnesses .18
7.3 Quality of material and surface of mounted and unmounted lenses, visors and filters .18
7.4 Basic impact level of complete protectors .19
7.4.1 Complete protectors .19
7.4.2 Failure criteria .19
7.4.3 Protectors with inserts to carry prescription lenses .20
7.5 Resistance to thermal exposure .20
7.6 Resistance to UV radiation .20
7.7 Resistance to corrosion .21
7.8 Resistance to ignition .21
ISO 16321-1:2021(E)
7.9 Penetration of vents and gaps .21
7.10 High-speed impact resistance, impact level C, D, E (optional requirement) .21
7.10.1 Protection at normal ambient temperatures .21
7.10.2 Protection at extremes of temperature .22
7.11 High mass impact, impact level HM (optional requirement) .23
7.11.1 Protection at normal ambient temperatures .23
7.11.2 Protection at extremes of temperature .23
7.12 Resistance to surface damage due to flying fine particles (optional requirement) .24
7.13 Resistance to fogging of lenses or filters (optional requirement) .24
7.14 Protection against molten metals and hot solids (optional requirement) .24
7.15 Protection against droplets (optional requirement) .24
7.16 Protection against streams of liquids (Optional requirement) .25
7.17 Protection against large dust particles (optional requirement) .25
7.18 Protection against gases and fine dust (optional requirement) .25
7.19 Protection against radiant heat (optional requirement) .25
7.20 Chemical resistance (optional requirement) .25
7.21 Use in explosive atmospheres (optional requirement) .26
8 Marking of protectors .26
8.1 General .26
8.2 Mandatory markings on lenses/filters .27
8.3 Mandatory markings on frames .27
8.4 Optional markings on lenses/filters .28
8.5 Optional markings on frames .28
8.6 Examples of markings .29
9 Information to be supplied by the manufacturer .29
10 Allocation of requirements, test samples and application .30
10.1 General test samples .30
10.2 Test samples for prescription lenses for eye protectors .37
10.2.1 Single-vision lenses .37
10.2.2 Multifocal lenses.38
10.2.3 Power-variation lenses .38
10.2.4 Information to be provided by the frame manufacturer .38
Annex A (informative) Summary of mechanical impact levels in eye and face protection for
sunglass, occupational and sports use .39
Bibliography .40
iv © ISO 2021 – All rights reserved

ISO 16321-1:2021(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 of the voluntary nature of standards, 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
www .iso .org/ iso/ foreword .html.
This document was prepared by ISO/TC 94, Personal safety — Personal protective equipment,
Subcommittee SC 6, Eye and face protection, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 85, Eye protective equipment, in accordance with
the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This document cancels and replaces ISO 4849:1981, ISO 4851:1979, ISO 4852:1978 and ISO 4856:1982.
A list of all parts in the ISO 16321 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
ISO 16321-1:2021(E)
Introduction
The family of documents comprised of the ISO 16321 series, the ISO 18526 series and the ISO 18527
series was developed in response to the worldwide stakeholders' demand for minimum requirements
and test methods for eye and face protectors traded internationally. ISO 4007 gives the terms and
definitions for all the various product types. The test methods are given in the ISO 18526 series, while
the requirements for occupational eye and face protectors are given in the ISO 16321 series. Eye
protectors for specific sports are mostly dealt with by the ISO 18527 series. A guidance document,
ISO 19734, for the selection, use and maintenance of eye and face protectors is under preparation.
vi © ISO 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 16321-1:2021(E)
Eye and face protection for occupational use —
Part 1:
General requirements
1 Scope
This document specifies general requirements for eye and face protectors. These protectors are
intended to provide protection for the eyes and faces of persons against one or more common
occupational hazards such as impacts from flying particles and fragments, optical radiation, dusts,
splashing liquids, molten metals, heat, flame, hot solids, harmful gases, vapours and aerosols.
Additional requirements for eye and face protectors used during welding and related techniques and
for mesh protectors are given in ISO 16321-2 and ISO 16321-3, respectively.
This document applies to:
— all plano as well as corrective and prescription lensed protectors and components;
— those eye and face protectors used for occupational-type tasks that are performed similarly to an
occupation, e.g. "do-it-yourself";
— those eye and face protectors used in educational establishments.
This document does not apply to:
— protectors specifically intended for protection against only solar radiation and used in non-
occupational environments for which the ISO 12312 series applies;
— protectors for medically prescribed applications (not occupational), e.g. eye protection for severe
dry eye, tints prescribed for medical conditions;
— patient eye protectors during diagnosis or treatment (e.g. ISO/TR 22463);
— protectors for use during medical or e.g. aesthetic applications, e.g. intense light sources (ILS) for
which the ISO 12609 series applies;
— protectors specifically intended for sports for which the ISO 18527 series applies;
— laser protectors;
— face protectors intended for live-working to protect against short-circuit electric arcs for which
IEC 62819 applies;
— protectors intended to protect against ionizing radiation, e.g. X-rays, for which IEC 61331-3 applies.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4007, Personal protective equipment — Eye and face protection — Vocabulary
ISO/CIE 11664-1, Colorimetry — Part 1: CIE standard colorimetric observers
ISO 16321-1:2021(E)
ISO 11664-2, Colorimetry — Part 2: CIE standard illuminants
ISO 12312-1:2013, Eye and face protection — Sunglasses and related eyewear — Part 1: Sunglasses for
general use
ISO 16034:2002, Ophthalmic optics — Specifications for single-vision ready-to-wear near- vision spectacles
ISO 16321-2:2021, Eye and face protection for occupational use — Part 2: Additional requirements for
protectors used during welding and related techniques
ISO 16321-3:2021, Eye and face protection for occupational use — Part 3: Additional requirements for
mesh protectors
ISO 18526-1:2020, Eye and face protection — Test methods — Part 1: Geometrical optical properties
ISO 18526-2:2020, Eye and face protection — Test methods — Part 2: Physical optical properties
ISO 18526-3:2020, Eye and face protection — Test methods — Part 3: Physical and mechanical properties
ISO 18526-4, Eye and face protection — Test methods — Part 4: Headforms
ISO 21987:2017, Ophthalmic optics — Mounted spectacle lenses
ISO 80079-36:2016, Explosive atmospheres — Part 36: Non-electrical equipment for explosive
atmospheres — Basic method and requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4007 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 General requirements for protectors
4.1 Ambient temperatures
1)
Protectors described in this document are intended for use at normal ambient temperatures (23 ± 5) °C.
In order to ensure that critical aspects of protection are not compromised due to temperatures towards
the extremes of the normal range of occupational environments from (−5 ± 2) °C to (+55 ± 2) °C, physical
and mechanical requirements at extremes of temperature are included (sometimes optionally) in this
document. These physical and mechanical requirements can also be provided by manufacturers for
validation of claims for protection at temperatures below (−5 ± 2) °C and/or above (+55 ± 2) °C.
4.2 Physiological compatibility
Protectors shall be designed and manufactured in such a way that, when used under the conditions
and for the purposes intended, they will not compromise the health or safety of the wearer. The risks
posed by substances leaking or evaporating from the protector that can come into prolonged contact
with the wearer, shall be reduced by the manufacturer to within the limits of any applicable regulatory
requirement.
1)  For the purposes of this document, “protector” is used as a general term for eye and/or face protectors such as,
but not limited to, spectacles, goggles, face shields and eye shields.
2 © ISO 2021 – All rights reserved

ISO 16321-1:2021(E)
Special attention shall be given to substances that are allergenic, carcinogenic, mutagenic or toxic to
reproduction.
NOTE 1 Excessive pressure due to a poor fit on the head, chemical irritation and allergy are known to produce
reactions. Rare or idiosyncratic reactions to any material are known to occur and the individual wearer is well
advised to avoid those types of frame materials.
Substances recommended for cleaning, maintenance or disinfection shall be known to be unlikely to
have any adverse effect upon the wearer, when applied in accordance with the instructions given in the
information to be supplied by the manufacturer.
Manufacturers/suppliers shall perform an appropriate risk analysis on potentially harmful substances
contained in the protector that, when the protector is used under the conditions and for the purposes
intended, the health (and safety) of the wearer shall not be compromised.
The following are examples of documents that represent the appropriate information:
a) specification of the material(s);
b) safety data sheets relating to the materials;
c) information relating to the suitability of the materials for use with food, in medical devices, or
other relevant applications;
d) information relating to toxicological, allergenic, carcinogenic, toxic to reproduction, or mutagenic
investigations on the materials.
NOTE 2 Specific national regulations with regard to restriction of certain chemical substances need to be
observed, for example release of nickel.
4.3 Construction and adjustment
Areas of the protector that may, during intended use, come into contact with the wearer shall be free
from projections, sharp edges or other features likely to cause discomfort or injury during use.
Any part of the protector that can be adjusted or removed by the wearer for the purpose of replacement
(in accordance with the instructions given in the information to be supplied by the manufacturer) shall
facilitate adjustment, removal and attachment without the use of tools.
Any adjustment system incorporated in the protector shall maintain the intended fit for the foreseeable
conditions of use.
The test shall be carried out by physical inspection in accordance with ISO 18526-3:2020, 6.1.
4.4 Cleaning and/or disinfection
The protectors shall be cleaned only once in accordance with the cleaning and/or disinfection
procedures in the information to be supplied by the manufacturer before being subjected to testing.
4.5 Headform(s)
Unless the manufacturer specifies the headform(s) in accordance with ISO 18526-4 that is/are
compatible with the protector, the test methods where (a) headform(s) is/are required shall use the
headform 1-M in accordance with ISO 18526-4 as the default.
4.6 Mandatory and optional requirements
In this document both optional and mandatory requirements are described. Depending on the intended
use and/or the manufacturer's claimed specification, some requirements marked as optional become
mandatory.
ISO 16321-1:2021(E)
5 Geometrical optical requirements for protectors
5.1 Field of view
Protectors, in the as-worn position, shall have a minimum unobstructed field of view in front of each
eye of 30° temporally and nasally in the horizontal meridian, and 30° superiorly and inferiorly in the
vertical meridian, when measured at the centre at the corneal apex of the headform in accordance with
ISO 18526-3:2020, 6.2.
Protectors used for driving shall have a minimum unobstructed field of view in front of each eye of
60° temporally and 30° nasally in the horizontal meridian and 30° superiorly and inferiorly in the
vertical meridian, when measured at the centre at the corneal apex of the headform in accordance with
ISO 18526-3:2020, 6.2.
5.2 Refractive power and prismatic power for plano lenses
5.2.1 Spherical and cylindrical power
Plano lenses shall be tested at the reference points in the as-worn position in accordance with
ISO 18526-1:2020, 6.1.
The spherical power and cylindrical power shall not exceed the tolerances given in Table 1.
Table 1 — Spherical power, cylindrical power and prismatic power tolerances
Products Spherical power Cylindrical power Additional Prismatic
requirements for power of
mounted plano lenses, unmounted
one-piece and visor plano lenses (in
covering both eyes any direction)
Mean value of the Absolute difference Maximum difference
focal powers between the focal between the measured
(F , F ) in the two powers (F , F ) in spherical powers of the
1 2 1 2
principal meridians the two principal right and left lenses
meridians (F , F )
R L
(F + F )/2
1 2
|F − F | |F − F |
1 2 R L
dioptres (D) dioptres (D) dioptres (D) prism dioptres (Δ)
flat automatic
welding filters,
flat passive
welding filters, ±0,06 ≤0,06 ≤0,09 ≤0,12
cover, or backing
plates for welding
filters
eye shields,
face shields,
±0,12 ≤0,12 ≤0,18 ≤0,25
spectacles,
goggles
5.2.2 Spatial deviation
If during the measurements in accordance with ISO 18526-1:2020, 6.1, a doubling or other aberration of
the image is observed, then the plano lens shall be further assessed in accordance with ISO 18526-1:2020,
6.3. The plano lens shall be free from irregular distortions likely to impair vision.
4 © ISO 2021 – All rights reserved

ISO 16321-1:2021(E)
5.2.3 Prismatic power for unmounted plano lenses covering one eye
Unmounted plano lenses shall be tested at the reference point in the as-worn position in accordance
with ISO 18526-1:2020, 6.1.
The prismatic power shall not exceed the values given in Table 1.
5.2.4 Prism imbalance of complete eye protectors or plano lenses covering both eyes
Complete eye protectors or plano lenses covering both eyes shall be tested in the as-worn position in
accordance with ISO 18526-1:2020, 6.2. Depending on the interpupillary distance (PD) of the specified
headforms, the respective diaphragm LB shall be used.
The prism imbalance shall not exceed the values given in Table 2.
Table 2 — Prism imbalance
Horizontal
Vertical
Base out Base in
prism dioptres
Products
prism dioptres prism dioptres
(Δ)
(Δ) (Δ)
flat automatic welding filters, flat passive 0,75 0,25 0,25
welding filters, cover, or back plates for
welding filters
eye shields, face shields, spectacles, 1,00 0,25 0,25
goggles
5.3 Mounted prescription lenses
5.3.1 Optical
The back vertex power, the direction of the cylinder axis, the addition power or the variation power,
and the prism imbalance shall satisfy the requirements of ISO 21987:2017, 5.3.
5.3.2 Positioning
The positioning of multifocal lenses, of position-specific single-vision lenses and of power-variation
lenses shall satisfy the requirements of ISO 21987:2017, 5.5.
5.4 Single-vision ready-to-wear near-vision lenses (lenses with positive spherical power)
The optical power range, the optical power, the design reference points and prismatic power shall
satisfy the requirements of ISO 16034:2002, 4.2, 4.3, and 4.4.
5.5 Enhanced optical performance (optional requirement)
Enhanced optical performances for protectors with plano lenses may be claimed by the manufacturer if
they fulfil the requirements given in both Tables 3 and 4.
ISO 16321-1:2021(E)
Table 3 — Enhanced optical performances — Spherical power and cylindrical power
Spherical power Cylindrical power Additional requirements for mounted
plano lenses and one-piece lenses and visors
that cover both eyes
Mean value of the focal Absolute difference between Maximum difference between the measured
powers (F , F ) in the the focal powers (F , F ) in spherical powers of the right and left lenses
1 2 1 2
two principal meridians the two principal meridians (F , F )
R L
(F + F )/2 |F − F | |F − F |
1 2 1 2 R L
dioptres (D) dioptres (D) dioptres (D)
±0,06 ≤0,06 ≤0,09
Table 4 — Enhanced optical performance — Prismatic power and prism imbalance
Unmounted Mounted plano lenses, unmounted and mounted one-piece lenses and visors
plano lens covering that cover both eyes
one eye
Prism imbalance
Prismatic power Base out Base in Vertical
prism dioptres prism dioptres prism dioptres prism dioptres
(Δ) (Δ) (Δ) (Δ)
0,12 0,75 0,25 0,25
6 Physical optical requirements for protectors
6.1 Detection of signal lights
Detection of signal lights is a mandatory requirement for sunglare filters for occupational use, but an
optional requirement for other protectors.
Between 475 nm and 650 nm, the spectral transmittance shall be not less than 0,20τ and the relative
v
visual attenuation coefficient, Q, for red, yellow, green and blue signal lights shall be not less than 0,80
when tested in accordance with ISO 18526-2:2020, Clause 11.
6.2 Luminous transmittance of lenses without deliberate filter action
The transmittance of lenses without deliberate filtering action (i.e. without declared scale numbers)
shall have a luminous transmittance, τ
...