Stilling’s test

Stilling’s test (In French test de Stilling et Hertel) procedure for assessing color sense, in which cards consisting of differently colored dot elements are presented; from these, letters or numbers, for example, must be recognized in order to rule out color vision deficiency. Through a modification of these test cards by S. Ishihara, it is also possible to identify the type of color vision deficiency; standard test for all occupations dealing with color.