Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 BS EN ISO 15351 is

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

BS EN 50121‑3‑1:2017+A1:2019 supersedes EN 50121-3-1:2015

BS ISO 4254-9 does not apply to:

nor from a significant hazard to life

BS 3988 was first published in 1966 under the authority of the Non-ferrous Metals Industry Standards Committee and at the request of the Aluminium Industry in view of the increasing use of aluminium for electrical conductors of many types

Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 BS EN ISO 15351 is1 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.