Ophthalmic instruments. Trial frames Ingestion-build-67170 or lots of drosses with

or lots of drosses with a metal yield less than 30 % are not within the scope of BS EN 13920-16

The dependability aspect is covered by the documents of the IEC 62059 series

This European standard has been updated to include the following significant changes:

These coatings need to meet certain performance requirements to ensure they perform as intended

European policymakers

Ophthalmic instruments. Trial frames Ingestion-build-67170 or lots of drosses with1 Scope This International Standard, together with ISO 15004 1, specifies minimum requirements and test methods for trial frames for holding trial case lenses, complying with ISO 9801, in front of a subject's eyes in order to assess visual acuity and facilitate optical correction of vision. This International Standard is applicable to lens holders mounted on headbands, bracket mounted frames and frames mounted in the manner of spectacles with supports