The Farnsworth D-15 Color Arrangement Test consists of a reference cap and fifteen colored caps. Patients arrange the caps in the order that appears most natural to them, and the resulting score pattern reveals whether a clinically significant color vision deficiency is present. The D-15 offers excellent diagnostic accuracy, fast administration, easy scoring, and reliable repeatability, making it one of the most widely used color arrangement tests in clinical practice. Scoring sheets are included, and you can download the free PDF here.To achieve the best results, the test should be conducted under natural lighting conditions and on a black background. One option is the Good-Lite True Daylight Illuminated Cabinet. It is specifically designed to provide optimal lighting during color vision testing. This device has been approved by the US FDA and US Defense Personnel Support Center for the armed forces. When ordering the replacement chip, please specify which number it is that you require in the notes section at checkout.
