Colour vision survey using the Ishihara, Dvorine, Boström and Kugelberg, Boström, and American-Optical Hardy-Rand-Rittler tests.

The aim of the survey was to evaluate the merits of each test for screening colour normals from colour defectives, with the selection of drivers of public vehicles especially in mind. This paper, however, is confined to a report and discussion of the data recorded at the Imperial College, and gives the views of the authors, and not of the Committee as a whole, on the general evaluation of the tests for screening purposes.