Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 nor from a significant hazard

nor from a significant hazard to life

Manufacturers of belt drives and pulleys

BS ISO 4254-9 does not apply to:

BS EN ISO 15351 is an International Standard which specifies a thermal conductimetric method after fusion under inert gas for the determination of nitrogen in steel and iron

Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 nor from a significant hazard1 Scope This British Standard specifies requirements for red and green filters of glass or plastics materials used in ophthalmic tests as follows: a) dichromatic tests for ametropia, and b) dissociating the eyes in various tests of binocular co operation.