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BSI
BS EN ISO 18369-4:2017

BS EN ISO 18369-4:2017

Current

Current

The latest, up-to-date edition.

Ophthalmic optics. Contact lenses Physicochemical properties of contact lens materials

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

30-04-2018

Publisher

British Standards Institution

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Physicochemical properties of contact lenses
5 Test report
Annex A (informative) - Determination of oxygen
        permeability using the coulometric method
Annex B (informative) - Determination of water
        content by refractive index
Annex C (informative) - Calculation of oxygen
        permeability of hydrogel lenses based on
        water content
Annex D (informative) - Measurement of refractive
        index using a prism coupling device
Bibliography

Defines the methods of testing the physicochemical properties of contact lens materials.

This document 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.

Committee
CH/172/9
DevelopmentNote
Supersedes BS EN ISO 10339, BS EN ISO 10340, BS EN ISO 11984, BS EN ISO 9913-1, BS EN ISO 9913-2, BS EN ISO 9914, BS 7208-13(1997), BS 7208-23(2000), BS 7208-5(1997), BS 7208-6(1997) & 04/30088803 DC. (10/2006) Supersedes 16/30310665 DC. (10/2017)
DocumentType
Standard
Pages
44
ProductNote
THIS STANDARD IS IDENTICAL TO EN ISO 18369-4 : 2017
PublisherName
British Standards Institution
Status
Current
Supersedes

ASTM F 1927 : 2014 : REDLINE Standard Test Method for Determination of Oxygen Gas Transmission Rate, Permeability and Permeance at Controlled Relative Humidity Through Barrier Materials Using a Coulometric Detector
ISO 18369-1:2017 Ophthalmic optics — Contact lenses — Part 1: Vocabulary, classification system and recommendations for labelling specifications
ISO 18369-2:2017 Ophthalmic optics — Contact lenses — Part 2: Tolerances
ISO 18369-3:2017 Ophthalmic optics — Contact lenses — Part 3: Measurement methods
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods

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Hardcopy - English
PDF - English
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