EN 166 - is the European standard covering the requirements for protective eyewear
It applies to all eye protection and guarantees adequate marking and the quality of the equipment.
Standard EN166 also defines the basic characteristics to which all eye protection must conform with regard to two criteria: the optical quality and the minimum strength. While all eye protection must be EN166 certified, all filters and equipment are also covered by specific standards which must be understood in order to ensure protective equipment is adapted to the activity of its wearer.
Requirement
Lens Symbol
Frame Marketing
Scale Number or Shade Number
Required for filters only
-
Manufacturer’s Identification
Required
Required
Number of the Standard
See below for further explanation
EN166
Optical Class
Mechanical Strength
Minimum Robustness
No symbol
No symbol
Enhanced Robustness
S
S
If high-speed particle testing requirements are met, the S symbol is replaced by one of the symbols below.
F
F
Low Energy Impact
B
B
Medium Energy Impact
A
A
High Energy Impact
Mandatory Markings
Particular/optional markings
Requirement
Lens Symbol
Frame Marketing
Droplets or splashes of liquids
3
Large dust particle
4
Gas and fine dust particle
5
Short circuit electric arc
8
8
Molten metals and hot solids
9
9
Resistance to surface damage by fine particles
K
Resistance to fogging
N
Marking for standards' numbers
-
EN170
-
2: UV filter, color recognition may be affected.
-
2C: UV filter with good color recognition.
-
-
EN171
-
4: IR protection
-
-
EN172
-
5: Solar filter without infrared protection.
-
6: Solar filter with infrared protection.
-