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New Computer Color Vision Test Quick and Reliable

Portal color sort test comparable to standard screening and grading tests

THURSDAY, Dec. 28 (HealthDay News) -- The Portal color sort test, a new computer-based color vision deficiency test, is a quick, efficient and reliable screening and grading tool that is comparable to standard color vision tests, according to a report in the December issue of the American Journal of Ophthalmology.

Alex Melamud, M.D., of the Cleveland Clinic Foundation in Ohio, and colleagues conducted a prospective study of 59 subjects with normal color vision or congenital color vision deficiency who were evaluated with the 15-plate Ishihara test, the D-15 Farnsworth-Munsell test and the Farnsworth-Munsell 100-Hue test. The results were compared to the Portal color sort test.

Spearman rank correlation between the Portal color sort test and the Farnsworth-Munsell 100-Hue test was 0.8. Reliability, measured by repeat testing of subjects on different days, showed good correlation between the two tests (0.7). The median time to finish the Portal test was 3.1 minutes, which was quicker than the Farnsworth-Munsell 100-Hue test, but slower than the times for the Ishihara and D-15 Farnsworth-Munsell tests.

"This study suggests that the Portal color sort test, a test of color vision deficiency, can be used effectively and reliably as a tool for screening (comparable to the Ishihara plates and the D-15) and grading (comparable to the Farnsworth-Munsell 100-Hue) color discrimination ability," the authors conclude.

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