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NEN-EN-ISO 18369-4

Ophthalmic optics - Contact lenses - Part 4: Physicochemical properties of contact lens materials

inactive
Organization: NEN
Publication Date: 1 September 2006
Status: inactive
Page Count: 44
ICS Code (Ophthalmic equipment): 11.040.70
scope:

This part of ISO 18369 specifies the methods of testing the physicochemical properties of contact lens materials. These are extraction, rigid lens flexure and breakage, oxygen permeability, refractive index and water content.

Document History

NEN-EN-ISO 18369-4
January 1, 2018
Ophthalmic optics - Contact lenses - Part 4: Physicochemical properties of contact lens materials
NEN-EN-ISO 18369-4 specifies the methods of testing the physicochemical properties of contact lens materials. These are extraction, rigid lens flexure and breakage, oxygen permeability, refractive...
NEN-EN-ISO 18369-4
September 1, 2017
Ophthalmic optics - Contact lenses - Part 4: Physicochemical properties of contact lens materials
NEN-EN-ISO 18369-4 specifies the methods of testing the physicochemical properties of contact lens materials. These are extraction, rigid lens flexure and breakage, oxygen permeability, refractive...
NEN-EN-ISO 18369-4
September 1, 2006
Ophthalmic optics - Contact lenses - Part 4: Physicochemical properties of contact lens materials
This part of ISO 18369 specifies the methods of testing the physicochemical properties of contact lens materials. These are extraction, rigid lens flexure and breakage, oxygen permeability,...
NEN-EN-ISO 18369-4
May 1, 2004
Ophthalmic optics - Contact lenses - Part 4: Physicochemical properties of contact lens materials
This part of ISO 18369 specifies the methods of testing the physicochemical properties of contact lens materials. These are extraction, rigid lens flexure and breakage, oxygen permeability,...

References

This document replaces:
NEN-EN-ISO 10339 - Ophthalmic optics - Contact lenses - Determination of water content of hydrogel lenses
Published by NEN on May 1, 1999
Describes methods for the determination of water content of hydrogel contact lenses. It specifies the procedures for making the measurements and establishes the conditions under which the...
This document replaces:
NEN-EN-ISO 10340 - Optics and optical instruments - Contact lenses - Method for determining the extractable substances
Published by NEN on June 1, 1996
Specifies an analytical method for the quantitative determination of the substances extractable from contact lenses by Soxhlet extraction with different solvents.
This document replaces:
NEN-EN-ISO 11984 - Opthalmic optics - Contact lenses - Determination of rigid lens flexure and breakage
Published by NEN on January 1, 2000
Describes a method for determining the flexural properties of finished rigid contact lenses when tested under specified conditions. The existence of this Standard does not imply in any way that the...
This document replaces:
NEN-EN-ISO 9913-1 - Optics and optical instruments - Contact lenses - Part 1: Determination of oxygen permeability and transmissibility by the FATT method
Published by NEN on August 1, 1998
Describes a polarographic method for the determination of oxygen permeability and oxygen transmissibility of contact lenses. Specifies the procedures for making the measurements and establishes the...
This document replaces:
NEN-EN-ISO 9913-2 - Optics and optical instruments - Contact lenses - Part 2: Determination of oxygen permeability and transmissibility by the coulometric method
Published by NEN on March 1, 2000
Describes a coulometric method for the determination of oxygen permeability of both rigid and non-hydrogel flexible contact lens materials and oxygen transmissibility of rigid and non-hydrogel...
This document replaces:
NEN-EN-ISO 9914 - Optics and optical instruments - Contact lenses - Determination of refractive index of contact lens materials
Published by NEN on November 1, 1996
Gives a reference test method for determining the refractive index of contact lens materials. Alternative methods may be used provided that repeatability and accuracy are at least equal to those...
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