BS 3668:1963

This standard BS 3668:1963 Specification for red and green filters used in ophthalmic dichromatic and dissociation tests is classified in these ICS categories:

• 11.040.70 Ophthalmic equipment

This British Standard specifies requirements for red and green filters of glass or plastics materials used in ophthalmic tests as follows:

1. dichromatic tests for ametropia, and

2. dissociating the eyes in various tests of binocular co-operation.

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.