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Defective Colour Vision Comparison of a Colour Vision Test made from Dyed Wool Patterns with the Ishihara Test
Author(s) -
Wain J. G.
Publication year - 1960
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1960.tb02370.x
Subject(s) - dichroic glass , test (biology) , optics , optometry , computer vision , artificial intelligence , mathematics , computer science , physics , medicine , biology , paleontology
The Wain Dichroic‐ladder test and the Ishihara test have been used to test 409 males. Of those tested, 9% were found to be defective by the Ishihara test. Statistical analysis of the results obtained from the Wain test showed that a further 3% of the observers could be regarded as having some form of colour defect. The new test was constructed so that it subtended an angle of 10° at the eye. Comparison of the observers' matches with the plots of the predicted matches suggests that the short‐wavelength receptors of the retina extend at least up to the boundary of the 10° field.