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

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

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1   Scope

This British Standard specifies requirements for red and green filters of glass or plastics materials used in ophthalmic tests as follows:
  1. a) dichromatic tests for ametropia, and
  2. b) dissociating the eyes in various tests of binocular co-operation.