['Color vision tests with pseudoisochromatic plates currently represent the most common procedure for the screening of congenital color vision deficiencies. By means of a web-based color vision test, new and old color plates can be tested for diagnostic quality without major effort.', "A total of 16 digitized Stilling's color plates of the 11th edition from 1907 were included in a web-based color vision test (http://www.farbsehtest.de). The χ(2)-test was used to check whether the Stilling color plates showed similar results to the nine previously evaluated Ishihara color plates.", 'A total of 518 subjects including101 (19.5\u2009%) female subjects with a mean age of 34.6\u2009±\u200917 years, took the web-based test with the 25 plates. For all participants the range for the correctly recognized plates was between 5.2\u2009% (n\u2009=\u200927) and 97.7\u2009% (n\u2009=\u2009506) for the Stilling color plates and between 64.9\u2009% (n\u2009=\u2009336) and 100\u2009% (n\u2009=\u2009518) for the Ishihara color plates. For participants with more than 5 errors (n\u2009=\u2009247), the range for correctly recognized plates was between 2.0\u2009% (n\u2009=\u20095) and 98.0\u2009% (n\u2009=\u2009242) for the Stilling plates and between 42.5\u2009% (n\u2009=\u2009105) and 100\u2009% (n\u2009=\u2009247) for the Ishihara plates. Taking all color plates and all participants into account there was a significantly higher incidence of erroneous recognition of the Stilling color plates (3038 false and 5250 true answers) compared to the Ishihara color plates (1511 false and 3151 true answers) (p\u2009<\u20090.001, χ(2)-test).'] Does [ Web-based analysis of Stilling 's color plate ]?