





EN 166: 2001
Personal eye-protection. Specifications.
	This document specifies functional requirements for various types of personal eye-protectors and incorporates general considerations such as designation; classification; basic requirements applicable to all eye-protectors; various particular and optional requirements; allocation of requirements, testing and application; marking; information for users.
	
	 
Optical class 1 = Continuous works (best quality)
Optical class 2 = Intermittent works
		Optical class 3 =  Occasional works only (lower quality) 
		 
MECHANICAL RESISTANCE
| Symbol | Mechanical resistance | 
| No symbol | Minimum robustness | 
| S | Increased robustness | 
| F | Low energy impact | 
| B | Medium energy impact | 
| A | High energy impact | 
		
		 
SYMBOLES DES DOMAINES D'UTILISATION
| Symbol | Designation | 
| No symbol | General use | 
| 3 | Liquids | 
| 4 | Large dust particles | 
| 5 | Gas and fine dustparticles | 
| 8 | Short circuit electric arc | 
| 9 | Molten metals and hot solids |