NBN EN ISO 18369-3 : 2006
Current
The latest, up-to-date edition.
OPHTHALMIC OPTICS - CONTACT LENSES - PART 3: MEASUREMENT METHODS
01-12-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Methods of measurement for contact lenses
4.1 Radius of curvature
4.2 Back vertex power
4.3 Diameters and widths
4.4 Thickness
4.5 Inspection of edges, inclusions and surface imperfections
4.6 Determination of spectral and luminous transmittance
4.7 Saline solution for contact lens testing
5 Test report
Annex A (informative) Measurement of rigid contact lens
curvature using interferometry
Annex B (informative) Determination of back vertex power
of soft contact lenses immersed in saline using
the Moire deflectometer or Hartmann methods
Bibliography
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