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BS 3668:1963

Current Date published:

Specification for red and green filters used in ophthalmic dichromatic and dissociation tests

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.

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BS 3668:1963

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