kSIST FprEN ISO 18527-2:2020

Eye and face protection for sports use - Part 2: Requirements for eye protectors for squash and eye protectors for racquetball and squash 57 (ISO/FDIS 18527-2:2020)

This International Standard applies to all eye protectors intended for eye protection against hazards during the
sports of Squash, Racquetball and Squash 57 and sports with similar hazards and no greater risks.
It deals with materials, construction, optical properties, testing, labelling and marking.
It applies to eye protectors that incorporate prescription lenses, but not to eye protectors designed for use
over spectacles.
Requirements for the marking of eye protectors and for information to be supplied by the manufacturer are
also specified.
Information on the selection and use of eye protectors for Squash, Racquetball and Squash 57 is given in
Annex A.
This International Standard does not apply to:
a. sports eye protectors designed for use over prescription spectacles;
b. eye protectors for occupational applications;
c. eye protectors without lenses;
d. eye protectors for sports where the hazards are unrelated to the hazards in or involve greater risks
than Squash, Racquetball and Squash 57.

Augen- und Gesichtsschutz für sportlichen Anwendungen - Teil 2: Anforderungen an Augenschutzgeräte für Squash und Augenschutzgeräte für Raquetball und Squash 57 (ISO/FDIS 18527-2:2019)

Dieses Dokument gilt für alle Augenschutzgeräte, die für den Schutz der Augen gegen Gefährdungen beim Spielen oder der Unterrichtung der Sportarten Squash, Racquetball und Squash 57 und von Sportarten mit ähnlichen Gefährdungen und höchstens gleich großen Risiken vorgesehen sind. Es gilt für Augenschutz-geräte, die Korrektionssichtscheiben enthalten, enthält jedoch keine entsprechenden Prüfungen für Augenschutzgeräte, die für das Tragen über Bügelbrillen ausgelegt sind.
Es legt die Anforderungen und Prüfungen für Werkstoffe, Funktionstauglichkeit, Kennzeichnung von Augenschutzgeräten und die vom Hersteller bereitzustellenden Informationen fest.
Anhang A enthält Informationen zur Auswahl und Verwendung von Augenschutzgeräten für Squash, Racquetball und Squash 57.
Dieses Dokument gilt nicht für
a) Sport-Augenschutzgeräte, die für das Tragen über Korrektionsbügelbrillen ausgelegt sind,
b) Augenschutzgeräte für andere betriebliche Anwendungen,
c) Augenschutzgeräte ohne Sichtscheiben,
d) Augenschutzgeräte für Sportarten, deren Gefährdungen nicht mit den bei Squash, Racquetball und Squash 57 auftretenden Gefährdungen verwandt sind oder die mit größeren Risiken als diese verbunden sind, und
e) Augenschutzgeräte mit Verlaufssichtscheiben, da sie nicht für Squash, Racquetball und Squash 57 geeignet sind.

Protection des yeux et du visage à usage sportif - Partie 2: Exigences relatives aux protecteurs oculaires pour le squash et aux protecteurs oculaires pour le racquetball et le squash (ISO/FDIS 18527-2:2019)

Ščitniki za oči in obraz za uporabo pri športu - 2. del: Zahteve za ščitnike za oči za squash in racquetball ter squash 57 (ISO/FDIS 18527-2:2019) TC: Ščitniki za oči in obraz za uporabo pri športu - 2. del: Zahteve za ščitnike za oči za skvoš in racquetball ter skvoš 57 (ISO/FDIS 18527-2:2020)

General Information

• Status: Not Published
• Public Enquiry End Date: 19-Aug-2018
• ICS: 13.340.20 - Head protective equipment
• ICS: 97.220.30 - Indoor sports equipment
• ICS: 97.220.40 - Outdoor and water sports equipment
• Technical Committee: OVP - Personal protecting equipment
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 01-Oct-2020
• Due Date: 19-Nov-2020
• Completion Date: 13-Oct-2020
• 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
• Ref Project: FprEN ISO 18527-2 - Eye and face protection for sports use - Part 2: Requirements for eye protectors for squash and eye protectors for racquetball and squash 57 (ISO/FDIS 18527-2:2020)

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 18527-2:2018
01-julij-2018

âþLWQLNL]DRþLLQREUD]]DXSRUDERSULãSRUWXGHO=DKWHYH]DãþLWQLNH]DRþL]D

VTXDVKLQUDFTXHWEDOOWHUVTXDVK,62',6

Eye and face protectors for sports use - Part 2 - Requirements for eye protectors for

squash and eye protectos for racquetball and squash 57 (ISO/DIS 18527-2:2018)
Augen- und Gesichtsschutz für sportlichen Anwendungen - Teil 2: Anforderungen an
Augenschutzgeräte für Squash und Augenschutzgeräte für Raquetball und Squash 57
(ISO/DIS 18527-2:2018)

Protection des yeux et du visage à usage sportif - Partie 2: Exigences relatives aux

protecteurs oculaires pour le squash et aux protecteurs oculaires pour le racquetball et le

squash (ISO/DIS 18527-2:2018)
Ta slovenski standard je istoveten z: prEN ISO 18527-2
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
97.220.30 Oprema za dvoranske športe Indoor sports equipment
97.220.40 Oprema za športe na Outdoor and water sports
prostem in vodne športe equipment
oSIST prEN ISO 18527-2:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 18527-2:2018
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oSIST prEN ISO 18527-2:2018
DRAFT INTERNATIONAL STANDARD
ISO/DIS 18527-2
ISO/TC 94/SC 6 Secretariat: BSI
Voting begins on: Voting terminates on:
2018-05-23 2018-08-15
Eye and face protection for sports use —
Part 2:
Requirements for eye protectors for squash and eye
protectors for racquetball and squash 57
Protection des yeux et du visage à usage sportif —

Partie 2: Exigences relatives aux protecteurs oculaires pour le squash et aux protecteurs oculaires pour le

racquetball et le squash
ICS: 13.340.20; 97.220.40; 97.220.30
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
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 18527-2:2018(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 2018
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oSIST prEN ISO 18527-2:2018
ISO/DIS 18527-2:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

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
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Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
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oSIST prEN ISO 18527-2:2018
ISO/DIS 18527-2:2018(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 General requirements for eye protectors ................................................................................................................................... 2

4.1 Headforms for testing ....................................................................................................................................................................... 2

4.2 Construction .............................................................................................................................................................................................. 2

4.3 Lens material and surface quality .......................................................................................................................................... 2

4.4 Physiological compatibility .......................................................................................................................................................... 2

4.5 Retention by headband and harnesses (Sit and fit) ................................................................................................ 3

5 Transmittance ......................................................................................................................................................................................................... 3

5.1 Test methods ............................................................................................................................................................................................. 3

5.2 Transmittance categories .............................................................................................................................................................. 3

5.3 General transmittance requirements .................................................................................................................................. 4

5.3.1 Uniformity of luminous transmittance and transmittance matching ................................ 4

5.3.2 Variations due to thickness variations .......................................................................................................... 4

5.4 Special transmittance requirements .................................................................................................................................... 4

5.4.1 Photochromic lenses .................................................................................................................................................... 4

5.4.2 Polarizing lenses .............................................................................................................................................................. 4

5.4.3 Gradient-tinted lenses ................................................................................................................................................. 4

5.5 Claimed solar transmittance properties (optional) ................................................................................................ 5

5.5.1 Solar blue-light absorption ..................................................................................................................................... 5

5.5.2 Solar blue-light transmittance ............................................................................................................................. 5

5.6 UV absorption/transmittance .................................................................................................................................................... 5

5.6.1 General...................................................................................................................................................................................... 5

5.6.2 Solar UV absorption ...................................................................................................................................................... 5

5.6.3 Solar UV transmittance .............................................................................................................................................. 5

5.6.4 Solar UV-A absorption ................................................................................................................................................. 5

5.6.5 Solar UV-A transmittance ......................................................................................................................................... 5

5.6.6 Solar UV-B absorption ................................................................................................................................................. 5

5.6.7 Solar UV-B transmittance ......................................................................................................................................... 5

5.7 Antireflective coated lenses ......................................................................................................................................................... 5

5.8 Reduced reflection coated lenses ............................................................................................................................................ 6

6 Scattering of light ................................................................................................................................................................................................. 6

7 Refractive power ................................................................................................................................................................................................... 6

7.1 Non-prescription eye protectors ............................................................................................................................................. 6

7.1.1 Spherical and cylindrical power ......................................................................................................................... 6

7.1.2 Spatial deviation ............................................................................................................................................................... 6

7.1.3 Prism imbalance ............................................................................................................................................................... 6

7.2 Prescription eye protectors ......................................................................................................................................................... 7

8 Mechanical strength .......................................................................................................................................................................................... 7

8.1 Mechanical strength of Squash eye protectors ............................................................................................................ 7

8.2 Mechanical strength of Racquetball and Squash 57 eye protectors ......................................................... 7

8.3 Failure criteria after impact ......................................................................................................................................................... 8

9 Resistance to solar radiation ................................................................................................................................................................... 8

10 Resistance to ignition ...................................................................................................................................................................................... 9

11 Field of view............................................................................................................................................................................................................... 9

12 Minimum area to be protected .............................................................................................................................................................. 9

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oSIST prEN ISO 18527-2:2018
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13 Optional requirements ...............................................................................................................................................................................10

13.1 Resistance to fogging ......................................................................................................................................................................10

13.2 Resistance to abrasion ...................................................................................................................................................................10

14 Information to be supplied by the manufacturer and labelling .......................................................................11

14.1 Complete eye protectors ..............................................................................................................................................................11

14.1.1 Mandatory markings on eye protectors ...................................................................................................11

14.2 Information to be supplied by the manufacturer with each eye protector......................................11

14.3 Additional information to be available from the manufacturer ................................................................12

15 Selection of test samples ...........................................................................................................................................................................12

15.1 General ........................................................................................................................................................................................................12

15.2 Preparation and conditioning of test samples ..........................................................................................................12

Annex A (informative) Use of Squash eye protectors and Racquetball and Squash 57

eye protectors .......................................................................................................................................................................................................15

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Regulation 2016/425 aimed to be covered ..............................................................................17

Bibliography .............................................................................................................................................................................................................................19

iv © ISO 2018 – All rights reserved
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oSIST prEN ISO 18527-2:2018
ISO/DIS 18527-2:2018(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 on 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 the following URL: www .iso .org/ iso/ foreword .html.

The committee responsible for this document is ISO/TC 94, Personal safety - Protective clothing and

equipment, Subcommittee SC 6, Eye and face protection,
A list of the parts of ISO 18527 can be found on the ISO website
© ISO 2018 – All rights reserved v
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oSIST prEN ISO 18527-2:2018
ISO/DIS 18527-2:2018(E)
Introduction

This family of documents was developed in response to the worldwide stakeholder's 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 in the ISO 18526-

series, while the requirements for occupational eye and face protectors are in the ISO 16321- series. Eye

protection for specific sports is mostly dealt with by the ISO 18527- series. A guidance document for the

selection, use and maintenance of eye and face protectors is in preparation.
vi © ISO 2018 – All rights reserved
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oSIST prEN ISO 18527-2:2018
DRAFT INTERNATIONAL STANDARD ISO/DIS 18527-2:2018(E)
Eye and face protection for sports use —
Part 2:
Requirements for eye protectors for squash and eye
protectors for racquetball and squash 57
1 Scope

This document applies to all eye protectors intended for eye protection against hazards during the

sports of Squash, Racquetball and Squash 57 and sports with similar hazards and no greater risks. It

applies to eye protectors that incorporate prescription lenses, but not to eye protectors designed for

use over spectacles. It deals with materials, construction, optical properties and testing.

Requirements for the labelling and marking of eye protectors and for information to be supplied by

the manufacturer are also specified. Information on the selection and use of eye protectors for Squash,

Racquetball and Squash 57 is given in Annex A.
This document does not apply to:
a. sports eye protectors designed for use over prescription spectacles;
b. eye protectors for occupational applications;
c. eye protectors without lenses;

d. eye protectors for sports where the hazards are unrelated to the hazards in or involve greater risks

than Squash, Racquetball and Squash 57.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For undated references, the latest edition of the referenced document

(including any amendments) applies.

ISO 4007:2018, Personal protective equipment – Eye and face protection – Vocabulary

ISO 8980-4:2006, Ophthalmic optics — Uncut finished spectacle lenses — Part 4: Specifications and test

methods for anti-reflective coatings

ISO 8980-5:2005, 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

ISO 12312-1:2013, Eye and face protection — Sunglasses and related eyewear — Part 1: Sunglasses for

general use

ISO 18526-1, Eye and face protection – Test methods – Part 1: Geometrical optical properties

ISO 18526-2, Eye and face protection – Test methods – Part 2: Physical optical properties

1) Under preparation (Stage at the time of publication ISO/DIS 18526-1)
2) Under preparation (Stage at the time of publication ISO/DIS 18526-2)
© ISO 2018 – All rights reserved 1
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oSIST prEN ISO 18527-2:2018
ISO/DIS 18527-2:2018(E)

ISO 18526-3, 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 21987:2009, Ophthalmic optics — Mounted spectacle lenses
3 Terms and definitions

For the purposes of this document the terms and the definitions given in ISO 4007 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .prg/
— ISO online browsing platform: available at http:// www .iso .org/ obp

For the purposes of this document, “eye protector” shall be taken to mean eye protectors for Squash,

Racquetball and Squash 57.
4 General requirements for eye protectors
4.1 Headforms for testing

Unless the manufacturer defines the applicable headforms according to ISO 18526-4 to be compatible

with the eye protector, the test methods where headforms are required shall use the headform 1-M

according to ISO 18526-4 as the default.
4.2 Construction

Areas of the eye protectors that may, during intended use, come into contact with the wearer shall be

smooth, without sharp protuberances that may cause discomfort or injury to the wearer. This shall be

tested by physical inspection in accordance with ISO 18526-3, 6.1.
4.3 Lens material and surface quality

In an area 30 mm diameter centred on the reference point, but excluding a marginal area 5 mm wide

around the edge of the lens if this overlaps with the circular area, lenses shall have no material or

machining defects that may impair vision, e.g. bubbles, scratches, inclusions, dull spots, pitting, mould

marks, notches, reinforced areas, specks, beads, water specks, pocking, gas inclusions, splintering,

cracks, polishing defects or undulations. Outside this zone, small isolated material and/or surface defects

may be acceptable. This shall be tested by visual assessment in accordance with ISO 18526-3, 6.6.

4.4 Physiological compatibility

Eye 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 eye protector that can come into prolonged contact

with the wearer shall be reduced by the manufacturer to within the limits of any existing regulatory

limit. 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 face, chemical irritation or allergy is 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.
3) Under preparation (Stage at the time of publication ISO/DIS 18526-3)
4) Under preparation (Stage at the time of publication ISO/DIS 18526-4)
2 © ISO 2018 – All rights reserved
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oSIST prEN ISO 18527-2:2018
ISO/DIS 18527-2:2018(E)

NOTE 2 Specific national regulations with regard to restriction of certain chemical substances should be

observed, for example release of nickel in Europe.
4.5 Retention by headband and harnesses (Sit and fit)

Eye protectors shall sit in the intended position during normal use and shall adapt to the contours of

the face. The surfaces in contact with the face shall be made of soft flexible material. Any head strap

shall be designed to be flexible or adjustable and sit securely on the back of the head. Any head strap

assembly shall not cause any discomfort nor exhibit any insecurity when tested in accordance with

ISO 18526-3, 6.5.
5 Transmittance
5.1 Test methods

Transmittance values shall be determined in accordance with ISO 18526-2, Clause 6 to 11 as appropriate.

Luminous transmittance shall be calculated using CIE Standard Illuminant D65 (ISO 4007:2018,

3.9.1.31).
5.2 Transmittance categories

Depending upon their luminous transmittance at their reference point and at (23 ± 1) °C in the case

of temperature sensitive transmittance, lenses for Squash, Racquetball and Squash 57 use shall be

attributed to one of the five tint categories in Table 1.

The range of the luminous transmittance of these five categories is given by the values in Table 1. An

overlap of the transmittance values shall be not more than ±2 % (absolute) between the categories 0, 1,

2 and 3. There is no overlap in transmittance values between categories 3 and 4.

If the supplier declares a luminous transmittance value, the maximum deviation for this value shall be

±3 % absolute for the transmittance values falling in categories 0 to 3 and ±30 % relative to the stated

value for the transmittance values falling in category 4.

When describing the transmittance properties of lenses with changeable tint, e.g. photochromic, two

categories for transmittance values are generally used. These two values correspond to the highest

transmittance state and to the lowest transmittance state of the lens.

Table 1 specifies also the UV requirements for Squash, Racquetball and Squash 57 eye protectors.

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oSIST prEN ISO 18527-2:2018
ISO/DIS 18527-2:2018(E)

Table 1 — Transmittance limits for the lenses of Squash, Racquetball and Squash 57 eye

protectors
Wavelength range from 280 nm to 400 nm Visible spectral range
Maximum Maximum Mean 380 nm to 400 nm Luminous transmit-
Tint cate-
solar UV-B trans- solar UV-A transmit- spectral transmittance tance
gory
mittance tance τ τ
380-400 v D65
τ τ 380 nm ≤ λ ≤ 400 nm 380 nm ≤ λ ≤ 780 nm
SUVB SUVA380
280 nm ≤ λ ≤ 315 nm 315 nm ≤ λ ≤ 380 nm
SR0 0,05 τ 0,5 τ 0,75 τ τ > 80%
v D65 v D65 v D65 v D65
SR1 0,05 τ 0,5 τ 0,75 τ 43 % < τ ≤ 80 %
v D65 v D65 v D65 v D65
1,0 % absolute or
SR2 0,05 τ 0,25 τ 0,50 τ 18 % < τ ≤ 43 %
v D65 v D65 D65 v D65
whichever is greater
SR3 1,0 % absolute 0,25 τ 0,50 τ 8 % < τ ≤ 18 %
v D65 v D65 v D65
0,5 % absolute or 0,5 % absolute or
SR4 1,0 % absolute 0,125 τ 0,125 τ 3 % < τ ≤ 8%
v D65 v D65 v D65
whichever is greater whichever is greater

NOTE Some national requirements may stipulate a different requirement for long wavelength limit of UV-A.

5.3 General transmittance requirements
5.3.1 Uniformity of luminous transmittance and transmittance matching

Lenses that are intended to be uniformly tinted shall appear to be visually uniform within a circle 30

mm in diameter around the reference points or to the edge of the lens less the marginal zone 5 mm

wide, whichever is greater,and appear to have the same transmittance at the two reference points

when inspected against a white background in accordance with ISO 18526-3, 6.6. Where there is visible

non-uniformity, then, when tested according to ISO 18526-2, 7.4, the relative difference in the luminous

transmittance value between any two points of the lens shall not be greater than 15 % (relative to the

higher value), except for tint category SR4 where it shall not be greater than 20 %.

Where there are visibly mismatched transmittances at the reference points, when measured in

accordance with ISO 18526-2, 7.5, the difference in luminous transmittance values at the reference

points for the right and left eyes shall not exceed 15 % (relative to the higher transmittance).

5.3.2 Variations due to thickness variations

Changes of luminous transmittance that are caused by thickness variations due to the design of the lens

are permitted. For verification, the test method in ISO 18526-2, 7.4.1.4 shall be used.

5.4 Special transmittance requirements
5.4.1 Photochromic lenses

Photochromic lenses shall meet the transmittance requirements of ISO 12312-1:2013, 5.3.4.1.

5.4.2 Polarizing lenses

Polarising lenses shall meet the transmittance requirements of ISO 12312-1:2013, 5.3.4.2.

5.4.3 Gradient-tinted lenses

NOTE No provision is made for gradient-tint lenses because they are not appropriate for Squash, Racquetball

and Squash 57.
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oSIST prEN ISO 18527-2:2018
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5.5 Claimed solar transmittance properties (optional)
5.5.1 Solar blue-light absorption

In the case where it is claimed that a lens has x % blue-light absorption, the solar blue-light transmittance

τ of the lens, measured according to ISO 18526-2, 9.1 shall not exceed (100,5 - x) %.

5.5.2 Solar blue-light transmittance

In the case where it is claimed that a lens has less than x % blue-light transmittance, the solar blue-light

transmittance τ of the lens, measured according to ISO 18526-2, 9.1 shall not exceed (x + 0,5) %.

5.6 UV absorption/transmittance
5.6.1 General
The requ
...