SIST EN ISO 12312-1:2022

SLOVENSKI STANDARD
01-september-2022
Nadomešča:
SIST EN ISO 12312-1:2013
SIST EN ISO 12312-1:2013/A1:2015
Varovanje oči in obraza - Sončna očala in sorodna oprema za varovanje oči - 1.
del: Sončna očala za splošno uporabo (ISO 12312-1:2022)
Eye and face protection - Sunglasses and related eyewear - Part 1: Sunglasses for
general use (ISO 12312-1:2022)
Augen- und Gesichtsschutz - Sonnenbrillen und ähnlicher Augenschutz - Teil 1:
Sonnenbrillen für den allgemeinen Gebrauch (ISO 12312-1:2022)
Protection des yeux et du visage - Lunettes de soleil et articles de lunetterie associés -
Partie 1: Lunettes de soleil pour usage général (ISO 12312-1:2022)
Ta slovenski standard je istoveten z: EN ISO 12312-1:2022
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
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 12312-1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2022
EUROPÄISCHE NORM
ICS 13.340.20 Supersedes EN ISO 12312-1:2013
English Version
Eye and face protection - Sunglasses and related eyewear -
Part 1: Sunglasses for general use (ISO 12312-1:2022)
Protection des yeux et du visage - Lunettes de soleil et Augen- und Gesichtsschutz - Sonnenbrillen und
articles de lunetterie associés - Partie 1: Lunettes de ähnlicher Augenschutz - Teil 1: Sonnenbrillen für den
soleil pour usage général (ISO 12312-1:2022) allgemeinen Gebrauch (ISO 12312-1:2022)
This European Standard was approved by CEN on 3 June 2022.

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 NORMALISATIO N

EUROPÄISCHES KOMITEE FÜR NORMUN G

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 12312-1:2022 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 . 4

European foreword
This document (EN ISO 12312-1:2022) 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 January 2023, and conflicting national standards shall
be withdrawn at the latest by January 2023.
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 ISO 12312-1:2013, EN ISO 12312-1:2013/A1:2015.
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
Directive(s) / Regulation(s).
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.
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 12312-1:2022 has been approved by CEN as EN ISO 12312-1:2022 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 (mandate
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 limit 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 of Clause(s)/sub-clause(s) of
Remarks/Notes
Regulation this EN
1.1.1 Ergonomics 4.1; 4.2
1.1.2 Level and classes of 5.2; 5.3.5; 7.1; 7.2; 7.3; 7.6
protection
1.2.1 Absence of risks and other 5.3.2; 5.3.3; 5.3.4.4.4; 5.3.4.4.6;
“inherent” nuisance factors 6.1; 6.2; 6.3
1.2.1.1 Suitable constituent 4.3
materials
1.2.1.2 Satisfactory surface 4.1
condition of all PPE parts in
contact with the user
1.2.1.3 Maximum permissible 4.2; 5.3.2; 6.1; 6.2; 6.3
user impediment
1.3.2 Lightness and design 7.1; 7.2; 7.3; 7.4; 7.5; 7.6;
strength Clause 8; Clause 9; Clause 10;
11.2
1.4 Manufacturer’s instructions 12.1; 12.2
and informations
2.3 PPE for the face, eyes, and 4.2; 5.3.2; 5.3.3; Clause 6
respiratory system
2.12 bearing one or more 12.1; 12.2
identification marking or
indicators directly or indirectly
relating to health and safety
2.14 “Multi risk” PPE Clause 5; Clause 7; Clause 9
3.1.1 Impact caused by falling of 7.1; 7.3; 7.6 Requirement concerning
ejected objects and collision of protection against collision of
parts of the body with obstacle part of the body with obstacle is
not covered
3.9.1 Non-ionising radiation Clause 5; 12.1; 11.1; 11.2; 12.2

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 product(s) falling within the scope of this
standard.
INTERNATIONAL ISO
STANDARD 12312-1
Second edition
2022-06
Eye and face protection — Sunglasses
and related eyewear —
Part 1:
Sunglasses for general use
Protection des yeux et du visage — Lunettes de soleil et articles de
lunetterie associés —
Partie 1: Lunettes de soleil pour usage général
Reference number
ISO 12312-1:2022(E)
ISO 12312-1:2022(E)
© ISO 2022
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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 12312-1:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Construction and materials .3
4.1 Construction . 3
4.2 Filter material and surface quality . 3
4.3 Physiological compatibility . 3
4.4 Headforms . 4
5 Transmittance . 4
5.1 Test methods . 4
5.2 Transmittance and filter categories . 4
5.3 General transmittance requirements . 5
5.3.1 Uniformity of luminous transmittance . 5
5.3.2 Requirements for road use and driving . 6
5.3.3 Wide-angle scatter . 6
5.3.4 Additional transmittance requirements for specific filter types . 6
5.3.5 Claimed transmittance properties . 8
6 Refractive power .10
6.1 Spherical and astigmatic power . 10
6.2 Spatial deviation . 10
6.3 Prism imbalance (relative prism error) . 10
7 Robustness .11
7.1 Minimum robustness of filters . 11
7.2 Frame deformation and retention of filters. 11
7.3 Impact resistance of sunglasses, strength level 1 (optional specification) . 11
7.4 Increased endurance of sunglasses (optional specification). 11
7.5 Resistance to perspiration (optional specification) .12
7.6 Impact resistance of sunglasses, strength level 2 or 3 (optional specification) .12
8 Resistance to solar radiation .13
9 Resistance to ignition .13
10 Resistance to abrasion (optional specification) .13
11 Protective requirements .14
11.1 Coverage area . 14
11.2 Temporal protective requirements . 14
12 Information and labelling .15
12.1 Information to be supplied with each pair of sunglasses . 15
12.2 Additional information. 17
13 Selection of test samples .18
13.1 General . 18
13.2 Preparation and conditioning of test samples . 18
Annex A (informative) Use of sunglass filters.21
Annex B (informative) Electro-optical sunglare filters .23
Annex C (normative) Unmounted filters used as replacement or alternative filters .25
Bibliography .29
iii
ISO 12312-1:2022(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 Technical Committee 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 second edition cancels and replaces the first edition (ISO 12312-1:2013), including
ISO 12312-1:2013/Amd.1:2015, which has been technically revised.
The main changes compared to the previous edition are as follows:
— added a specification for the electro-optical filters;
— replaced the "local variations in refractive power" with the "spatial deviation";
— introduced the activation of photochromic lenses at 5 °C and 35 °C as optional information;
— extended the side protection to children's sunglasses mounting filter category 4 lenses.
A list of all parts in the ISO 12312 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.
iv
INTERNATIONAL STANDARD ISO 12312-1:2022(E)
Eye and face protection — Sunglasses and related
eyewear —
Part 1:
Sunglasses for general use
1 Scope
This document is applicable to all afocal (plano power) sunglasses and clip-ons for general use, including
road use and driving, intended for protection against solar radiation.
Information on the use of sunglass filters is given in Annex A. Requirements for unmounted filters used
as replacement or alternative filters are given in Annex C.
This document is not applicable to:
a) eyewear for protection against radiation from artificial light sources;
b) eye protectors intended for specific sports (e.g. ski goggles or other types – see ISO 18527 (all parts));
c) sunglasses that have been medically prescribed for attenuating solar radiation;
d) products intended for direct observation of the sun, such as for viewing a partial or annular solar
eclipse, for which ISO 12312-2 applies;
e) products intended for occupational eye protection – see, for example, ISO 16321 (all parts).
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 8980-5, Ophthalmic optics — Uncut finished spectacle lenses — Part 5: Minimum requirements for
spectacle lens surfaces claimed to be abrasion-resistant
ISO 11664-2, Colorimetry — Part 2: CIE standard illuminants
1)
ISO 12311:— , Personal protective equipment — Test methods for sunglasses and related eyewear
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 18526-4:2020, Eye and face protection — Test methods — Part 4: Headforms
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4007 and the following apply.
1)   In preparation. Stage at the time of publication, ISO/DIS 12311:2022.
ISO 12312-1:2022(E)
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 https:// www .electropedia .org/
3.1
related eyewear
eyewear intended for protection in the same wavelength range as solar radiation but not necessarily
originating from the Sun
3.2
electro-optical sunglare filter
electro-optical sunglass filter
filter that varies, by electro-optical means, its luminous transmittance depending upon the illuminance
and spectral bands to which it is exposed or by manual control
Note 1 to entry: The change in luminous transmittance may be under automatic or manual control, or a
combination. For example, where the luminous transmittances in the faded and darkened states are set manually,
and transitions between them automatically. The luminous transmittance of the filter therefore varies within
certain limits in response to the illuminance.
3.3
reaction time
t
r
‹electro-optical sunglare filter› response time of an electro-optical sunglare filter (3.2) to darken from
its luminous transmittance in the faded state (τ ) towards its luminous transmittance in the darkened
v 0
state (τ ) when activated or to fade from its darkened state towards its faded state.
v 1
Note 1 to entry: The reaction time is the time taken for the filter to change its luminous transmittance from the
fully darkened or faded state by 90 % of the difference between the luminous transmittances in the faded and
darkened states , i.e. from τ to {τ - 0,9 × (τ - τ )} or from τ to {τ + 0,9 × (τ -τ ) },
v 0 v 0 v 0 v 1 v 1 v 1 v 0 v 1
where
τ is the luminous transmittance of the lens or filter in the faded state;
v 0
τ is the luminous transmittance of the lens or filter in the darkened state.
v 1
Note 2 to entry: Darkening and fading times may be different.
3.4
absorption ratio
A
R
‹electro-optical sunglare filter› ratio of the luminous transmittance in the faded state to that in the
darkened state
Note 1 to entry: The absorption ratio, AR, is calculated from the following formula:
τ
v 0
A =
R
τ
v 1
where
τ is the luminous transmittance of the lens or filter in the faded state;
v 0
τ is the luminous transmittance of the lens or filter in the darkened state.
v 1
ISO 12312-1:2022(E)
3.5
default mode
luminous transmittance state of an electro-optical sunglare filter (3.2) when the power supply is
disconnected or malfunctions
Note 1 to entry: The power supply can be mains electricity, a battery or a photovoltaic cell.
4 Construction and materials
4.1 Construction
When tested in accordance with ISO 18526-3:2020, 6.1, areas of the sunglass, including the frame and,
if in a rimless or semi-rimless style, the edges of the filters, that may come into contact with the wearer
during intended use shall be smooth and without sharp projections.
NOTE Manufacturers are recommended to use the range of screw sizes and threads used in sunglass frames
as specified in ISO 11381.
4.2 Filter material and surface quality
When tested in accordance with ISO 18526-3:2020, 6.6, except in a marginal area 5 mm wide, sunglass
filters shall have no material or machining defects within an area of 30 mm diameter centred on the
reference point that could impair vision, e.g. bubbles, scratches, inclusions, dull spots, pitting, mould
marks, notches, reinforced areas, specks, beads, water specks, pock marks, gas inclusions, splintering,
cracks, polishing defects or undulations. If this 5 mm wide portion around the edge of the test sample
intrudes into this circular area, then this intrusion shall be excluded from testing.
4.3 Physiological compatibility
Sunglasses shall be designed, manufactured and packaged in such way that, when used under normal
conditions, they will not compromise the health or safety of the wearer. The risks posed by substances
leaking or evaporating from the sunglasses that can come into prolonged contact with the wearer shall
be reduced by the manufacturer to within the limit of any applicable regulatory requirement.
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 can 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 sunglasses that, when the sunglasses are used under normal conditions, 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 in medical devices, or other relevant
applications;
d) information relating to toxicological, allergenic, carcinogenic, toxic to reproduction, or mutagenic
investigations on the materials.
ISO 12312-1:2022(E)
NOTE 2 Attention is drawn to specific national regulations that restrict substances, e.g. Nickel release
requirements.
4.4 Headforms
Unless the manufacturer specifies the headform(s) in accordance with ISO 18526-4 that is/are
compatible with the sunglasses, the test methods where (a) headform(s) is/are required shall use the
headform 1-M for adult's sunglasses and (1-C6) or (1-C12) for children's sunglasses as specified in
ISO 18526-4 as the default.
5 Transmittance
5.1 Test methods
Transmittance values shall be determined in accordance with ISO 18526-2:2020, Clause 7. If the
direction of measurement is not specified, then the direction of measurement shall be normal to the
surface of the test sample at its geometrical centre.
The relative uncertainty of measured spectral transmittance shall be less than or equal to those given
in ISO 18526-2:2020, Table 1, except for the range 100 % to 17,8 %, for which it shall be 2 % instead of
5 %
5.2 Transmittance and filter categories
Sunglass filters for general use shall be assigned to one of five filter categories based on the luminous
transmittance at their reference point.
The ranges of luminous transmittance of these five categories are given by the values in Table 1. An
overlap of the transmittance values shall be not more than ±2 % (absolute) between adjacent categories
0, 1, 2 and 3. There is no overlap in transmittance values between categories 3 and 4.
For gradient-tinted filters, the overlap in luminous transmittance allowed between categories shall be
double that for uniformly tinted filters.
In the case of gradient-tinted filters, the transmittance value at the reference point shall be used to
characterize the luminous transmittance and the category of the filter.
The maximum deviation for the declared luminous transmittance value shall be ±3 % absolute for
the transmittance values falling in categories 0 to 3 and ± 30 % relative to the declared value for the
transmittance values falling in category 4.
For gradient-tinted and/or mirrored filters, the maximum deviation for the declared luminous
transmittance value shall be double that for uniformly tinted lenses.
When describing the transmittance properties of photochromic and electro-optical filters, two
categories for transmittance values are generally used. These two values correspond to the faded state
and to the darkened state of the filter.
Table 1 also specifies the UV requirements for sunglass filters for general use and, when the filters are
claimed by the manufacturer to protect against IR radiation, the IR requirements.
ISO 12312-1:2022(E)
Table 1 — Transmittance for sunglass filters for general use
Consumer Technical
Requirements
label label
Filter cate- Enhanced infra-
Usage Ultraviolet spectral range Visible spectral range
a
gory red absorption
Maximum
Maximum value
Maximum value of value of solar
Range of luminous of solar IR
solar UV-B trans- UV-A transmit-
transmittance transmittance
mittance tance
τ τ
V D65 SIR
τ τ
SUVB SUVA 380
380 nm to 780 nm 780 nm to
280 nm to 315 nm 315 nm to
2 000 nm
380 nm
Very limited
reduction of 0 0,05 τ τ τ > 80 % τ
v D65 v D65 v D65 v D65
sunglare
Limited pro-
tection from 1 0,05 τ τ 43 % < τ ≤ 80 % τ
v D65 v D65 v D65 v D65
sunglare
Good protec- 1,0 % absolute or
tion against 2 0,05 τ , which- 0,5 τ 18 % < τ ≤ 43 % τ
v D65 v D65 v D65 v D65
sunglare ever is greater
High protec-
tion against 3 1,0 % absolute 0,5τ 8 % < τ ≤ 18 % τ
v D65 v D65 v D65
sunglare
Very high pro-
tection against
extreme 1,0 % absolute
sunglare, e.g. or 0,25 τ ,
V D65
4 1,0 % absolute 3 % < τ ≤ 8 % τ
v D65 v D65
at sea, over whichever is
snowfields, on greater
high mountain,
or in desert
NOTE Some requirements in different standards stipulate 400 nm as the long wavelength limit of UV-A.
a
Only applicable to sunglass filters claimed by the manufacturer as a protection against infrared radiation.
5.3 General transmittance requirements
5.3.1 Uniformity of luminous transmittance
The relative difference in the luminous transmittance value between any two points of the filter within
a circle (30 ± 1) mm in diameter centred on the reference point shall not be greater than 15 % (relative
to the higher value), except for category 4 where it shall not be greater than 20 %. If a 5 mm wide
portion around the edge of the test sample intrudes into this circular area, then this intrusion shall be
excluded from testing.
The geometric or boxed centre takes the place of the reference point if this is not known.
In the case of mounted gradient filters, this requirement shall be limited to sections parallel to the line
connecting the two reference points.
For mounted filters, the relative difference between the luminous transmittance value of the filters at
the reference point for the right and left eyes shall not exceed 20 % for gradient-tinted filters and 15 %
for all other types (relative to the lighter filter).
Changes of luminous transmittance that are caused by thickness variations due to the design of the
filter are permitted. For verification, the test method in ISO 18526-2:2020, 7.4.1.4 shall be used.
ISO 12312-1:2022(E)
5.3.2 Requirements for road use and driving
5.3.2.1 General
Filters suitable for road use and driving shall be of categories 0, 1, 2 or 3 and shall additionally meet the
following two requirements.
a) Spectral transmittance. The spectral transmittance of filters suitable for road use and driving for
wavelengths between 475 nm and 650 nm shall be not less than 0,20 τ .
v D65
b) Detection of signal lights. The relative visual attenuation quotient Q of filters of categories 0, 1, 2
and 3 suitable for road use and driving shall be not less than 0,80 for red signal light and not less
than 0,60 for yellow, green and blue signal lights. The relative visual attenuation quotient for signal
light detection, Q , shall be calculated in accordance with ISO 18526-2:2020, Clause 11 (spectral
signal
distribution of radiation emitted by incandescent lights).
NOTE Calculations using the values for quartz-halogen lamps and LED signals will give different results.
LED signal technology is still evolving, so specific data is not yet available.
5.3.2.2 Road use (including driving) in twilight or at night
Sunglass filters with a luminous transmittance of less than 75 % shall not be used in twilight or at night
for road use (including driving). In the case of photochromic sunglass filters, this requirement applies
when tested in accordance with ISO 18526-2:2020, 16.3.2.
5.3.3 Wide-angle scatter
When tested in accordance with ISO 18526-2:2020, 14.1, at the reference point, the wide-angle scatter
of the filters in the condition as supplied by the manufacturer shall not exceed the value of 3 %.
5.3.4 Additional transmittance requirements for specific filter types
5.3.4.1 Photochromic filters
The luminous transmittance of a photochromic sunglass filter depends primarily on the amount of
radiation reaching it and the ambient temperature. The actual conditions of use may result in luminous
transmittances that are markedly different from those expressed by the filter categories and measured
under test conditions. The categories of the photochromic filter shall be determined by its luminous
transmittance in its faded state, τ , and its luminous transmittance in its darkened state, τ , achieved
v 0 v 1
after 15 min ± 5 s irradiation according to ISO 18526-2:2020, Clause 16. In both states, the requirements
specified in 5.2 and, if applicable, the requirements specified in 5.3.2, shall be met. For photochromic
filters, τ /τ shall be ≥1,25.
v 0 v 1
Optionally, the luminous transmittance can be measured also at temperatures of 5 °C and 35 °C.
5.3.4.2 Polarizing filters
If the filters in the sunglasses are claimed to be polarizing, when tested in accordance with
ISO 18526-2:2020, Clause 15. The sunglass has to be positioned with the pantoscopic angle and the
face form angle “as worn” , the filters shall be fitted in the frame so that their planes of transmission
do not deviate from the vertical, or from the specified direction if different from the vertical, by more
than ±5°. Additionally, any misalignment between the planes of transmission of the left and right filters
shall not be greater than 6°.
In the case of clip-ons, the misalignment shall be tested in the position assumed to be taken when
mounted on the spectacles or sunglasses.
ISO 12312-1:2022(E)
When tested in accordance with ISO 18526-2:2020, Clause 15, the polarizing efficiency shall be >78 %
for filter categories 2, 3, 4 and > 60 % for filter category 1. Filters of category 0 do not have any useful
polarizing effect.
NOTE The polarizing efficiency values of 78 % and 60 % are approximately equal to polarizing ratio values
of 8:1 and 4:1 respectively.
5.3.4.3 Gradient-tinted filters
5.3.4.3.1 General
All parts of a gradient-tinted filter within a 10 mm ± 1 mm radius circle centred on the reference point
shall comply with the transmittance requirements in 5.2 and, for filters suitable for road use and
driving, 5.3.2 (except for the filter category which is defined by the transmittance at the reference
point). Uniformity of transmission is subject to the requirements of 5.3.1.
5.3.4.3.2 Determination of the filter category
The filter category of gradient-tinted filters shall be determined by the luminous transmittance value at
the reference point.
The filter category determined at the reference point shall be used to define whether the filters are
suitable for road use and driving according to 5.3.2.
5.3.4.4 Electro-optical sunglare filter, electro-optical sunglass filter
5.3.4.4.1 General
The categories of an electro-optical filter shall be determined by its luminous transmittance in its faded
state τ and its luminous transmittance in its darkened state τ in accordance with ISO 18526-2:2020,
v 0 v 1
17.11 and Annex E. In both states, the filter shall comply with the requirements specified in 5.2, and, if
applicable, the requirements specified in 5.3.2.
In the case of electro-optical filters with manual control, the faded and darkened state have to be set
manually as specified by the manufacturer in lieu of illuminance.
Annex B gives further information on electro-optical filters.
5.3.4.4.2 Default mode
Electro-optical sunglare filters, when in the default mode, shall comply with all other relevant
requirements.
5.3.4.4.3 Reaction time
The reaction time of electro-optical filters to change from the faded (high transmittance) state
to the darkened (low transmittance) state, or, from the darkened state to the faded state, shall be
measured when changing from (500 ± 50) lx to (50 000 ± 5 000) lx or vice-versa in accordance with
ISO 18526-2:2020, 17.11 and Annex E. The reaction time shall be expressed in seconds.
The measurements shall be taken at a temperature of (23 ± 2) °C and optionally also at (5 ± 2) °C and
(35 ± 2) °C.
5.3.4.4.4 Photosensitive seizures
An inherent technology-specific property of an electro-optical filter or external flashing sunlight
may, under very rare circumstances, trigger the light detector of an electro-optical filter and provoke
ISO 12312-1:2022(E)
photosensitive seizures, such as outlined in ISO 9241-391. Electro-optical filters are, in view of their
reaction time characteristics, not for use by individuals who are susceptible to photosensitive seizures.
5.3.4.4.5 Combined uniformity and angular dependence of luminous transmittance
The combined uniformity and angular dependence of the luminous transmittance in the darkened
state of electro-optical filters shall comply with the requirements of Table 2 for the angles of incidence
between 0° and ±30°. The darkened state transmittance shall be tested according to ISO 18526-2:2020,
17.9 in the as-worn position.
Table 2 — Combined uniformity and angular dependence of luminous transmittance
Range of luminous Maximum Maximum Maximum value
Filter cate-
transmittance value of C value of C of ΔP
15 30
gory
τ % % %
v D65
0 τ > 80 % 40 60 15
v D65
1 43 % < τ ≤ 80 % 40 60 15
v D65
2 18 % < τ ≤ 43 % 50 70 20
v D65
3 8 % < τ ≤ 18 % 50 70 30
v D65
4 3 % < τ ≤ 8 % 60 80 40
v D65
5.3.4.4.6 Narrow angle scatter
Narrow angle scatter shall be evaluated in accordance with ISO 18526-2:2020, 14.2. The reduced
luminance coefficient (l*) of electro-optical sunglare filters shall not exceed 3,0 (cd/m )/lx in their
faded and darkened states.
NOTE Narrow angle scattering of light can affect the visual acuity of the wearer, given the molecular size,
the optical anisotropy and eventually the dopant dyes used in controlling the luminous transmittance of electro-
optical sunglare filters.
5.3.5 Claimed transmittance properties
The test methods are as specified in 5.1.
For reference, see Annex A.
5.3.5.1 Solar Blue-light absorption/transmittance
5.3.5.1.1 Solar Blue-light absorption
In the case where it is claimed that a filter has x % solar blue-light absorption, the solar blue-light
transmittance, τ , of the filter shall not exceed (100,5 - x) %.
SB
5.3.5.1.2 Solar Blue-light transmittance
In the case where it is claimed that a filter has less than x % solar blue-light transmittance, the solar
blue-light transmittance, τ , of the filter shall not exceed (x + 0,5) %.
SB
5.3.5.2 UV absorption/transmittance
5.3.5.2.1 General
Requirements for the transmittance of filters for sunglasses in UV-A and UV-B shall be as given in
Table 1. In cases where it is claimed that a product reaches a certain percentage of UV absorption or UV
transmittance better than the requirement in Table 1, the relevant requirement(s) below shall apply.
ISO 12312-1:2022(E)
5.3.5.2.2 Solar UV absorption
In the case where it is claimed that a filter has x % solar UV absorption, the solar UV transmittance of
the filter τ shall not exceed (100,5 - x) %.
SUV
5.3.5.2.3 Solar UV transmittance
In the case where it is claimed that a filter has less than x % solar UV transmittance, the solar UV
transmittance of the filter τ shall not exceed (x + 0,5) %.
SUV
5.3.5.2.4 Solar UV-A absorption
In the case where it is claimed that a filter has x % solar UV-A absorption, the solar UV-A transmittance
of the filter τ shall not exceed (100,5 - x) %.
SUVA 380
5.3.5.2.5 Solar UV-A transmittance
In the case where it is claimed that a filter has less than x % solar UV-A transmittance, the solar UV-A
transmittance of the filter τ shall not exceed (x + 0,5) %.
SUVA 380
5.3.5.2.6 Solar UV-B absorption
In the case where it is claimed that a filter has x % solar UV-B absorption, the solar UV-B transmittance
of the filter τ shall not exceed (100,5 - x) %.
SUVB
5.3.5.2.7 Solar UV-B tra
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