Eye & Face Protection
Spectacles & Goggles
10
European standards for eye protection
Basic standards
EN 166 Specifications
EN 167 Optical test methods
EN 168 Test methods other than optical
Standards by application
EN 169 Welding filters
EN 170 Ultraviolet filters
EN 171 Infrared filters
EN 172Solar protection filters for industrial use
EN 175 Welding work equipment
EN 207 Glasses for laser protection
EN 208 Glasses for laser adjustment
EN 379 Specifications concerning welding filters
Frame marking
Frame marking must include the CE symbol and the manufacturer’s identification (logo or brand). If spectacles refer to the EN Standard, the
number of the EN Standard is compulsory with the various application and mechanical strength symbols, in accordance with the tests
requested by the manufacturer.
Symbols
3 - Liquid droplets or splashes
4 - Large dust particles >5 µm
5 - Gas and fine dust particles <5 µm
8 - Electrical short circuit arc
9 - Molten metal and hot solids
Mechanical strength symbols
S - Extra strong, resists a 22 mm, 43 g ball falling 1,30 m
F - Low energy impact, resists a 6 mm, 0,86 g ball at 45 m/s
B - Medium energy impact, resists a 6 mm, 0,86 g ball at 120 m/s
A - High energy impact, resists a 6 mm, 0,86 g ball at 190 m/s
K - Resistance to surface deterioration by small particles (optional)
N - Resistance to misting or fogging (optional)
Lens marking
Lens marking must include: The scale number for filtering lenses and the manufacturer's name (logo or brand recommended by the
manufacturer).
Radiation protection
2 - UV Protection (EN 170). The number 2 indicates the filter may affect colour recognition
2C or 3 - UV Protection (EN 170). The number 2C (previously 3) indicates the filter allows good colour recognition
4 - Infrared Protection (EN 171). i.e. protection from heat
5 - Solar Protection (EN 172). i.e. 100% UV sun glare protection - with no infrared (IR) protection
6 - Solar Protection (EN 172). i.e. 100% UV sun glare protection - with infrared (IR) protection
Optical quality
1 - Class 1 High optical, quality suitable for regular use. Refractive power of ±0,06 dioptres
2 - Class 2 Medium optical, qualities suitable for occasional use. Refractive power of ±0,12 dioptres
3 - Class 3 Low optical, qualities suitable for exceptional use. Refractive power of ±0,25 dioptres
Strength of the lens
S - Extra strong, resists a 22 mm, 43 g ball falling 1,30 m
F - Low energy impact, resists a 6 mm, 0,86 g ball at 45 m/s
B - Medium energy impact, resists a 6 mm, 0,86 g ball at 120 m/s
A - High energy impact, resists a 6 mm, 0,86 g ball at 190 m/s
K - Resistance to surface deterioration by small particles (optional)
N - Resistance to misting or fogging (optional)
T - Mecanical strength against particles travelling at high speeds and extreme temperatures
Warning
F - Maximum protection for spectacles with side arms
B - Maximum protection for goggles
A - Maximum protection for face protections
If the S, F, B and A symbols are not the same for the lens and the frame, the lower level should be assigned to the complete protective
equipment.
