NF EN ISO 18369-4

NF EN ISO 18369-4

November 2017
Standard Current

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

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.

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Main informations

Collections

National standards and national normative documents

Publication date

November 2017

Number of pages

46 p.

Reference

NF EN ISO 18369-4

ICS Codes

11.040.70   Ophthalmic equipment

Classification index

S11-813-4

Print number

2 - 01/05/2019

International kinship

ISO 18369-4:2017

European kinship

EN ISO 18369-4:2017
Sumary
Ophthalmic optics - Contact lenses - Part 4 : physicochemical properties of contact lens materials

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.

Replaced standards (1)
NF EN ISO 18369-4
December 2006
Standard Cancelled
Ophthalmic optics - Contact lenses - Part 4 : physicochemical properties of contact lens materials

Le présent document vise à spécifier les méthodes d'essai des propriétés physicochimiques des matériaux constitutifs des lentilles de contact. Il s'agit, en l'occurrence, de spécifier l'extraction, la flexion et la rupture des lentilles de contact rigides, la perméabilité à l'oxygène, l'indice de réfraction et la teneur en eau.

Table of contents
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  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Propriétés physicochimiques des lentilles de contact
  • 5 Rapport d'essai
  • Annexe A Détermination de la perméabilité à l'oxygène à l'aide de la méthode coulométrique
  • Annexe B Détermination de la teneur en eau à l'aide de l'indice de réfraction
  • Annexe C Calcul de la perméabilité à l'oxygène des lentilles de contact hydrogel en fonction de leur teneur en eau
  • Annexe D Mesurage de l'indice de réfraction à l'aide d'un dispositif de couplage par prisme
  • Bibliographie
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