European certification for civilian eye protection divided into 3 categories:
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.