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NBN EN ISO 18369-3 : 2006

Current

Current

The latest, up-to-date edition.

OPHTHALMIC OPTICS - CONTACT LENSES - PART 3: MEASUREMENT METHODS

Published date

12-01-2013

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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

Describes the methods for measuring the physical and optical properties of contact lenses specified in ISO 18369-2, i.e. radius of curvature, back vertex power, diameter, thickness, inspection of edges, inclusions and surface imperfections, and determination of spectral and luminous transmittances.

DevelopmentNote
Supersedes NBN EN ISO 8321-1 and NBN EN ISO 8321-2. (03/2008) Supersedes NBN EN ISO 8599, NBN EN ISO 9337-2, NBN EN ISO 9338, NBN EN ISO 9339-1, NBN EN ISO 9339-2, NBN EN ISO 10338, NBN EN ISO 9341, NBN EN ISO 10344 and NBN EN ISO 9337-1. (11/2009)
DocumentType
Standard
PublisherName
Belgian Standards
Status
Current

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