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Full Description

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.

Cross References:
BS 2738
BS 3062
BS 3162
BS 3172
BS 3186
BS 3199
BS 3352
BS 3462
BS 3521