NEN EN 13178 : 2000

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
      4.1 Design and manufacture
             4.1.1 General requirements
             4.1.2 Materials
             4.1.3 Sit and fit
             4.1.4 Ventilation
      4.2 Optical requirements
             4.2.1 Field of vision
             4.2.2 Ocular requirements
      4.3 Mechanical requirements
             4.3.1 Impact resistance
             4.3.2 Resistance to corrosion
             4.3.3 Resistance to fogging
      4.4 Optional requirements
             4.4.1 Enhanced infrared absorption
5 Testing
      5.2 Field of vision
      5.3 Refractive powers
      5.4 Transmittance
             5.4.1 Luminous transmittance
             5.4.2 Ultraviolet transmittance
             5.4.3 Infrared transmittance
      5.5 Variations in luminous transmittance
      5.6 Diffusion of light
      5.7 Quality of material and surface
      5.8 Resistance to ultraviolet radiation
      5.9 Impact resistance
      5.10 Resistance to corrosion
      5.11 Resistance to fogging
6 Information
      6.1 Information supplied by the manufacturer
      6.2 Information which shall be available from the
             manufacturer or supplier
7 Marking
      7.1 Oculars
      7.2 Frames
Annex A (informative) Uncertainty of measurement and results
                      interpretation
Annex ZA (informative) Clauses of this European Standard
                       addressing essential requirements or
                       other provisions of EU directives
Bibliography

Establishes requirements and test procedures for eye protectors for snowmobile users. Intended to protect the user from risks of corneal freezing, mechanical impacts, and from factors such as UV radiation, fogging and sunglare which may adversely affect the wearer's vision.