Abstract
Using the Farnsworth dichotomous D15 test and the Farnsworth-Munsell 100-hue test, Bowman compared the colour discrimination of subjects having age related maculopathy to that of age matched normals. In this paper a quantitative assessment of Bowman's results was obtained using the colour difference vector analysis of Vingrys and King-Smith. The assessment indicates that there is selective blue-yellow loss in age related maculopathy and that the FM 100-hue test is more useful than the D15 test in distinguishing between normal subjects and those with early age related maculopathy. We suggest that the vector method of analysis is particularly useful in clinical trials and in monitoring changes of colour vision over time.
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