I.S. EN ISO 21987:2017
Current
The latest, up-to-date edition.
Hardcopy , PDF
English
01-01-2017
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
National Foreword
European foreword
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Requirements
6 Verification methods
7 Marking for position-specific single-vision
lenses and power-variation lenses
8 Recommendations on mounting
9 Identification
10 Reference to this document
Annex A (informative) - Material and surface quality
Annex B (informative) - Recommendations on mounting
Annex C (informative) - Alternative method for measuring
prism imbalance (relative prism error) for mounted
single-vision lenses (excluding position-specific
single-vision lenses) and multifocal lenses
Bibliography
Annex ZA (informative) - Relationship between this
document and the Essential Requirements of
Directive 93/42/EEC [OJ L 169] aimed to be
covered
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