A computer implemented method to form, display, and evaluate, a test for colorblindness, wherein the method selects one or more test images, displays those test images seriatim to a test subject using a visual display device. A response is received from the test subject to each of the displayed test images. Each response is compared to a nominal test subject response associated with the displayed test image. The type and number of test images displayed is determined based on the test subject's responses.