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sklademVydáno: 2019-06-11
19/30373688 DC
BS EN ISO 8624. Ophthalmic optics. Spectacle frames. Measuring system and terminology
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| Označení normy: | 19/30373688 DC |
| Počet stran: | 21 |
| Vydáno: | 2019-06-11 |
| Status: | Draft for Comment |
DESCRIPTION
19/30373688 DC
This standard 19/30373688 DC BS EN ISO 8624. Ophthalmic optics. Spectacle frames. Measuring system and terminology is classified in these ICS categories:
- 11.040.70 Ophthalmic equipment
This document specifies a measuring system for spectacle frames and related terminology. It is applicable to spectacle frames with fronts that are intended to be symmetrical.
NOTE
Minor asymmetry of only the nasal bearing surfaces has been included in this edition. Since such asymmetry does not affect the lens shapes, only the definition of bridge height is affected, having an amendment in its note 2 to entry.