EN.166 is a particular safety norm. When a piece of eyewear is EN.166 certified it generally means that it is a piece of safety eyewear.
The correct term is actually EN.166 personal Eye Protection European Standard, but is normally referred to as EN.166 or EN.166. It is the core technical industrial safety norm in Europe for eye protection applying to all types of individual protection of the eye which protects from hazards likely to damage the eye, except for nuclear radiation, x-rays, laser emissions and infrared emitted by low temperature sources.
EN.166 is often the minimum required certification regarding eyewear in Personal Protective Equipment (PPE).
DIFFERENT TYPES OF EN.166
European certification for civilian eye protection have different categories. The important ones are:
EN.166S (Safety glasses):
Frame and lens must withstand the impact of a 22 mm steel ball weighing 43 grams dropped from 1,3 meters at a speed of 18 km/h. The lens must remain in the frame and is not to shatter. The frame must remain intact as well.
EN.166F (Safety glasses):
Frame and lens must withstand the impact of a 6 mm steel ball weighing 0,86 gram fired at 162 km/h. The lens must remain in the frame and is not to shatter. The frame must remain intact as well.
EN.166B (Safety goggles):
Frame and lens must withstand the impact of a 6 mm steel ball weighing 0,86 gram fired at 432 km/h. The lens must remain in the frame and is not to shatter. The frame must remain intact as well.
WHAT DOES IT TAKE TO BE EN.166 CERTIFIED?
The primary tests for EN.166 are:Field of vision,Resistance to ignitionOptical transmission and diffusion testsStability to heatRobustness testsResistance to ageingResistance to UVResistance to corrosion