Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790 Manufacturers of belt drives and

Manufacturers of belt drives and pulleys

1 has been corrected

Recommendation for the maximum length of a dental explorer was reduced from 178 mm to 173 mm in 4

BS ISO 4254-9 does not apply to:

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 Manufacturers of belt drives and1 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.