![]() Not all dichromats were classified as strong, which was one of the goals of the reengineering and those graded as medium and strong included dichromats and those who have a mild colour vision deficiency based on the results of the Farnsworth D15 test and the anomaloscope range. Those with redgreen colour vision deficiency were correctly classified as protan or deutan on 86 per cent of occasions, with 11 per cent unclassified and three per cent incorrectly classified.Īll those graded as having a mild defect by the Richmond HRR test passed the Farnsworth D15 test and had an anomaloscope range of 30 or less. Sensitivity and specificity become 0.98 and 1.0, respectively, when the fail criterion is three or more errors. Colour vision was diagnosed using the Ishihara test, the Farnsworth D15 test, the Medmont C100 test and the Type 1 Nagel anomaloscope. ![]()
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