EN 167:2001

Foreword
1 Scope
2 Normative references
3 Test for spherical, astigmatic and prismatic
  refractive powers
  3.1 Testing unmounted oculars covering one eye
  3.2 Testing unmounted oculars covering both eyes and
      mounted oculars (spectacles, goggles and
      face-shields)
4 Light diffusion test
  4.1 Principle
  4.2 Test methods
5 Assessment of quality of material and surface
6 Determination of transmittance
7 Determination of variations in luminous transmittance
  7.1 Unmounted oculars covering one eye
  7.2 Mounted oculars and unmounted oculars covering both
      eyes
  7.3 Method to correct transmittance for variations
      in thickness of the ocular
8 Determination of spectral reflectance in infrared
Annex A (normative) Method for measuring spherical and
        astigmatic refractive powers over small areas
        A.1 Principle
        A.2 Apparatus
        A.3 Measurements
Annex B (informative) Uncertainty of measurement and results
        interpretation
        B.1 Test report and uncertainty of measurement
Annex ZA (informative) Clauses of this European Standard
         addressing essential requirements or other provisions
         of EU Directives

This European standard specifies optical test methods for eye-protectors, the requirements for which are contained in other EN's. Alternative methods may be used if shown to be equivalent. Non-optical test methods are given in EN 168. A definition of terms is given in EN 165.