EN ISO 18369-4:2017
Current
Ophthalmic optics - Contact lenses - Part 4: Physicochemical properties of contact lens materials (ISO 18369-4:2017, Corrected version 2017-10-01)
09-20-2017
European foreword
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
ISO 18369-4:2017 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 |
CEN/TC 170
|
| DevelopmentNote |
Supersedes EN ISO 10339, EN ISO 10340, EN ISO 11984, EN ISO 9913-1, EN ISO 9913-2 & EN ISO 9914. (09/2006)
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| NF EN ISO 18369-4 : 2017 | Identical |
| NS EN ISO 18369-4 : 2017 | Identical |
| BS EN ISO 18369-4:2017 | Identical |
| PN EN ISO 18369-4 : 2017 | Identical |
| DIN EN ISO 18369-4:2016-06 (Draft) | Identical |
| ISO 18369-4:2017 | Identical |
| NBN EN ISO 18369-4 : 2006 | Identical |
| I.S. EN ISO 18369-4:2017&LC:2018 | Identical |
| NEN EN ISO 18369-4 : 2017 + COR 2018 | Identical |
| UNE-EN ISO 18369-4:2018 | Identical |