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

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

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.