FAQ: Goggles and Visors Regulations

What do the letters on the lenses (F, B, A) mean?

They indicate mechanical impact resistance: F (low energy impact, 45 m/s - typical of goggles), B (medium energy, 120 m/s - typical of visors/masks), A (high energy, 190 m/s - thick polycarbonate visors).

Can I use standard eyeglasses at the worksite?

No, standard eyeglasses are not certified against impact, and if broken, the glass lenses could cause serious damage to the eye. You need to wear certified over-glasses or graduated safety glasses.

What is the difference between K and N marking?

They are optional high-quality treatments: K indicates resistance to scratching from fine particles, N indicates resistance to fogging. For work with goggles or temperature changes, N marking is essential.