PubMed · 1085889
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J B Davidoff. 1976. Hemispheric differences in hue discrimination.. https://pubmed.ncbi.nlm.nih.gov/1085889/
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INTRODUCTION: The computerized chromatic test allows a graphic visualization of the colors perceived by normal and pathologic retina. MATERIAL AND METHOD: This test was returned by an album (six series of plates with ten levels of saturation), a lamp and a program for graphic representation. RESULTS: The graphic image was returned by the computer. For a normal eye, the aspect of the chart was a set of ten concentric saturation levels: the most saturated circle were located on the outside. For an acquired or congenital dyschromatopsia, the limits of the neutral zone are located in the center and are constituted by the most saturated level of blind charts of the album. DISCUSSION AND CONCLUSION: The informatized chromatic test is a very easy one to appreciate color vision defects.
Direct heterochromic comparisons were made in 334 examinations of 148 patients with glaucoma. This test evidenced the classical breaches of blue and also alterations in the red spectrum which were observed mainly in cases with an unfavorable course or during the most severe stages of the disease. This examination technique is easy to repeat and gives an accurate assessment of disease course. It is useful for guiding treatment.
A simulated field test was designed to determine whether the Holmes-Wright A lantern (HWA) is a valid color vision test for the rail industry. The simulation replicated viewing rail signal lights at 0.8 km distance under daylight conditions. Using the worst-normal as the maximum number of allowable errors on the simulation, 94% of the color-defectives failed both tests on the first trial and 92% failed at the second session. The HWA had a higher false negative rate than a false alarm rate. The majority of individuals who had discrepancies on the two tests were mild deutans. Results from the Ishihara test were marginally better at predicting performance on the simulation.