Abstract
At the Göttingen meeting of the International Colour Vision Society, I reported on a comparison of the second edition of the American Optical Hardy-Rand-Rittler Pseudoisochromatic plates (AO HRR) with the Richmond Products third edition of the same test and concluded that the chromaticities were exceptionally poorly matched and that the new edition was a “pale imitation of the real thing” (unpublished). This conclusion led to our abandoning a clinical trial. In 2002, Richmond Products has published a fourth edition and, in 2003, Waggoner has published a modified HRR with additional (Ishihara style) plates and the tetartan confusion figures removed. As a precursor to any clinical trial, the colors used in the plates have been measured and comparisons drawn between the four editions. While the two most recent editions much more closely resemble the original AO HRR and the chromaticities are much better aligned on the dichromatic confusion lines, the excitation purities (and therefore the degree of difficulty) of the plates are less well matched in the Richmond Products editions. In addition, there is a significant degree of metamerism in the third edition and Waggoner edition that makes variations in illuminant more critical to performance.
Publisher
Cambridge University Press (CUP)
Subject
Sensory Systems,Physiology
Reference16 articles.
1. Wyszecki, G. & Stiles, W.S. (1982).Color Science: Concepts and Methods, Quantitative Data and Formulae.New York:John Wiley & Sons.
2. Walls, G.L. (1959).How good is the HRR test for color blindness? American Journal of Optometry and Physiological Optics 36,169–193.
3. Hardy, L.H. , Rand, G. , & Rittles, M.C. (1954).The H-R-R Polychromatic plates.Journal of the Optical Society of America 44,509–523.
4. Birch, J. (1997).Clinical use of the American Optical Company (Hardy, Rand andRittler) pseudoisochromatic plates for red–green colourdeficiency.Ophthalmic and Physiological Optics 17(3),248–254.
5. Kaimbo, W.K. , Bifuko, Z.A. , Longo, M.B. , Dralands, L. , & Missotten, L. (2002).Color vision in 42 Congolese patients with tuberculosis receivingethambutol treatment.Societe Belge d'Ophtalmologie. Bulletin 284,57–61.
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