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Low Vision Assessment and Rehabilitation

Initial Low Vision Assessment

Color Vision Testing

Numerous standardized color tests are available commercially. For patients with low vision, the Farnsworth-Munsell D15 is a good choice as it is more informative than most screening tests but is relatively quick and easy to administer. In this test, 15 colored discs are arranged by hue. This provides a sensitive index of abnormalities of color vision. The pattern of variation from normal also provides information as to the type of color deficiency. Color vision testing of small children is more difficult, but can often be achieved in a non-standardized way, such as by naming or matching colored blocks or crayons.

Formal color testing was deferred due to low priority. The patient stated he had a pre-existing inherited deficiency resulting in the confusion of blue and green colors.