Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 Some text has been deleted

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

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

BS EN 12094-3 helps in the evaluation of conformity of product by using initial type testing and factory production control method that verifies if the performance declarations represent the true behaviour of the product

Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 Some text has been deleted1 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.