There are four types of tests currently available to test for IrochromaticTM (colour blindness).
The purpose of the Waggoner HRR (Hardy Rand Rittler) is to determine if an individual has a colour vision deficiency. If colour vision is deficient, the test determines the type and degree of the deficiency. The Waggoner HRR can be used on both adults and children, literate or illiterate, since it uses symbols to identify the deficiencies. As it uses symbols, the test can be used to test individuals who speak any language. The Waggoner HRR uses both pseudoisochromatic and desaturated test plates to increase its sensitivity and specificity. The benefits of the Waggoner HRR test is it takes less than 2 minutes to complete and incorporates easily recognized international symbols. It is designed to detect a colour vision deficiency and also determines the type of deficiency and estimate the degree of the deficiency for protan, deutan, and tritan color vision deficiency.