oSIST prEN 166:2007

SLOVENSKI STANDARD
01-december-2007
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Personal eye-protection - Specifications
Persönlicher Augenschutz - Anforderungen
Protection individuelle de l'oeil - Spécifications
Ta slovenski standard je istoveten z: prEN 166
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.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2007
ICS 13.340.20 Will supersede EN 166:2001
English Version
Personal eye-protection - Specifications
Persönlicher Augenschutz - Anforderungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 85.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 166:2007: E
worldwide for CEN national Members.

Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .5
4 Classification.5
5 Designation of filters .6
6 Design and manufacturing requirements .8
7 Basic, particular and optional requirements .8
8 Allocation of requirements, test schedules and application .18
9 Marking .28
10 Information supplied by the manufacturer .40
Annex A (informative) Significant technical changes between this European Standard and the
previous edition .42
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or
other provisions of EU Directives.43

Foreword
This document (prEN 166:2007) has been prepared by Technical Committee CEN/TC 85 “Eye protective
equipment”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 166:2001.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA which is an integral part of this document.
Annex A provides details of significant technical changes between this European Standard and the previous
edition:
1 Scope
This European Standard specifies functional requirements for various types of personal eye-protectors and
incorporates general considerations such as:
 designation;
 classification;
 basic requirements applicable to all eye-protectors;
 various particular and optional requirements;
 allocation of requirements, testing and application;
 marking;
 information for users.
The transmittance requirements for various types of filter oculars are given in separate standards (see clause 2).
This European Standard applies to all types of personal eye-protectors used against various hazards, as
encountered in industry, laboratories, educational establishments, DIY activities, etc. which are likely to damage the
eye or impair vision, with the exception of nuclear radiation, X-rays and laser beams.
The requirements of this standard do not apply to eye-protectors for which separate and complete standards exist,
such as laser eye-protectors, sunglasses for general use, etc. unless such standards make specific reference to
this standard.
The requirements of this standard apply to oculars for welding and allied processes but do not apply to equipment
for eye and face protection for welding and allied processes, requirements for which are contained in EN 175.
Eye-protectors fitted with prescription lenses are not excluded from the field of application. The refractive power
tolerances and other special characteristics dependent upon the prescription requirement are specified in
EN ISO 8980-1 and EN ISO 8980-2.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 136, Respiratory protective devices – Full face masks – Requirements, testing, marking.
EN 165, Personal eye-protection — Vocabulary.
prEN 167:2007, Personal eye-protection — Optical test methods.
prEN 168:2007, Personal eye-protection — Non-optical test methods.
EN 169, Personal eye-protection — Filters for welding and related techniques — Transmittance requirements and
recommended utilisation.
EN 170:2002, Personal eye-protection — Ultraviolet filters —Transmittance requirements and recommended use.
EN 171, Personal eye-protection — Infrared filters — Transmittance requirements and recommended use.
EN 172, Personal eye-protection — Sunglare filters for industrial use.
EN 175, Personal protection — Equipment for eye and face protection during welding and allied processes.
EN 379, Specification for welding filters with switchable luminous transmittance and welding filters with dual
luminous transmittance.
EN ISO 6942, Protective clothing. Protection against heat and fire. Method of test: Evaluation of materials and
material assemblies when exposed to a source of radiant heat.
EN ISO 8980-1, Ophthalmic optics — Uncut finished spectacle lenses - Part 1: Specifications for single-vision and
multifocal lenses (ISO 8980-1:1996).
EN ISO 8980-2, Ophthalmic optics — Uncut finished spectacle lenses - Part 2: Specifications for progressive
power lenses (ISO 8980-2:1996).
EN ISO 8980-3, Ophtalmic optics – Uncut finished spectacle lenses – Part 3 : Transmittance specifications and test
methods (ISO 8980-3 :1999).
3 Terms and definitions
For the purpose of this European Standard, the terms and definitions given in EN 165 and the following apply.
3.1
visual centre
the point on the ocular corresponding to the intersection of the horizontal and vertical planes through the pupil of
the appropriate head-form specified in clause 17 of prEN 168:2007 when the eye-protector is fitted to it in
accordance with the manufacturers instructions
3.2
radiant heat
longer wavelength infrared radiation (IR-B and IR-C) from low temperature sources, which is typically not
associated with emission of significant quantities of visible radiation.
NOTE The emission spectrum of a radiating heat source is a function of the source temperature. Hotter sources emit
predominantly at shorter wavelengths (<2000nm) covered by EN 171.
4 Classification
4.1 Function of eye-protectors
The function of eye-protectors is to provide protection against:
 impacts of different severities;
 optical radiations;
 molten metals and hot solids;
 droplets and splashes;
 dust;
 gases;
 short circuit electric arc;
or any combination of these.
4.2 Types of eye-protectors
NOTE Refer to definitions given in EN 165.
4.2.1 Spectacles with or without lateral protection
4.2.2 Goggles
4.2.3 Face-shields
NOTE Face-shields normally incorporate a suitable headband, browguard, helmet, protective hood or other appropriate
mounting device.
4.3 Types of ocular
4.3.1 Mineral oculars (glass)
4.3.1.1 Untoughened mineral oculars
4.3.1.2 Toughened mineral oculars, toughened chemically, thermally or by other processes to give superior
resistance to impact in comparison with untoughened mineral oculars.
4.3.2 Organic oculars (plastic)
4.3.3 Laminated oculars
Oculars made in multiple layers joined together by a binder.
NOTE All types of oculars may be further classified into filtering types (for example according to EN 169, EN 170, EN 171,
EN 172 and EN 379). They may also be classified as oculars with corrective effect and oculars without corrective effect. They
may also have coatings on their surface(s) to give additional characteristics.
5 Designation of filters
The transmittance characteristics of a filter are represented by a scale number.
The scale number is a combination of the code number and the shade number of the filter, joined together by a
dash.
The scale number for welding filters does not include a code number, it comprises the shade number only.
Table 1 gives the designation of the various types of filters specified in this European Standard.
Table 1 — Scale numbers for filters
Welding filters Ultraviolet filters Infrared filters Filters for sunglare
No number Code Code Code Code
code
number 2 number 4 number 5 number 6
Scale number
1,2 2 – 1,2 4 – 1,2 5 – 1,1 6 – 1,1
1,4 2 – 1,4 4 – 1,4 5 – 1,4 6 – 1,4
1,7 2 – 1,7 4 – 1,7 5 – 1,7 6 – 1,7
2 2 – 2 4 – 2 5 – 2 6 – 2
2,5 2 – 2,5 4 – 2,5 5 – 2,5 6 – 2,5
3 2 – 3 4 – 3 5 – 3,1 6 – 3,1
4 2 – 4 4 – 4 5 – 4,1 6 – 4,1

5 2 - 5 4 - 5
6  4 - 6
7  4 – 7
8  4 – 8
9  4 – 9
10  4 - 10
Code number key :
2 Ultraviolet filter
4 Infrared filter ;
5 Sunglare filter without infrared specification ;
6 Sunglare filter with infrared specification.

Additional classifications :
C = Ultraviolet filter with enhanced colour recognition in accordance with clause 5.3 of EN 170:2002
R = Infrared filter with enhanced reflectance in accordance with clause 7.3.3 of this standard
6 Design and manufacturing requirements
6.1 General construction
Eye-protectors shall be free from projections, sharp edges or other defects which are likely to cause discomfort or
injury during use.
6.2 Materials
No parts of the eye-protector which are in contact with the wearer shall be made of materials which are known to
cause any skin irritation.
6.3 Headbands
Headbands, when used as the principal means of retention, shall be at least 10 mm wide over any portion which
may come into contact with the wearer’s head. Headbands shall be adjustable or self-adjusting.
7 Basic, particular and optional requirements
All eye-protectors shall meet the basic requirements given in 7.1.
Furthermore, according to their intended use, eye-protectors shall, if appropriate, meet one or more of the particular
requirements given in 7.2.
Optional requirements related to additional properties of eye-protectors are given in 7.3.
7.1 Basic requirements
7.1.1 Field of vision
The size of the field of vision is defined in conjunction with the appropriate head-form described in clause 17 of
prEN 168:2007.
Eye-protectors shall exhibit a minimum field of vision defined by the two ellipses in Figure 1 when placed and
centered at a distance of 25 mm from the surface of the eyes of the appropriate head-form. The horizontal axis
shall be parallel to and 0,7 mm below the height of the line connecting the centres of the two eyes.
The horizontal length of the ellipses shall be of 22,0 mm, the vertical width of the ellipses shall be 20,0 mm. The
centre distance of the two ellipses shall be d = c + 6 mm, where c is the pupillary distance. The pupillary distance is
64 mm for the medium head-form and 54 mm for the small head-form, if not specified differently by the
manufacture.
The test shall be carried out in accordance with clause 18 of prE
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