Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 BS ISO 4254-9 does not

BS ISO 4254-9 does not apply to:

1 has been corrected

1 — Information about emission-related confirmed DTC(s)

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

Some text has been deleted from clause 5

Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 BS ISO 4254-9 does not1 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.