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Investigation of Color Vision using a Web-based Color Vision Test
1Kuchenbecker J., 1Wecke T., 2Wiermer R., 1Lindner H., 1Behrens-Baumann W.,
1Otto-von-Guericke-Universität Magdeburg, Universitäts-Augenklinik (Magdeburg)
2Otto-von-Guericke-Universität Magdeburg, Fakultät für Informatik (Magdeburg)
Background: Screening tests of visual functions using the internet are theoretically possible. To use these tests as screening test, they must deliver comparable results with conventional test procedures. A web-based color vision test was developed based on pseudoisochromatic color plates. The test results performed under standardized examination conditions were compared to the results of a conventional pseudoisochromatic color plates test via book.
Method: A web-based color vision test was developed according to the pseudoisochromatic color plates by Velhagen and Broschmann using the programming-languages HTML, Java and Perl. The test was performed under standardized examination conditions via intranet. Sixty-seven voluntary subjects, including nine color-deficient subjects, were examined by randomisation by luminescence color plates (via web-based color vision test) and pigment color plates (via book). The statistical analysis was performed by determing the correspondance and the 95%- confidence interval.
Results: The correspondance of the test results (passed, did not pass, doubtful) for all subjects was 0,98 and the 95%- confidence interval was within 0,91 and 0,99. The correspondance of the data of different color plates varied from 0,78 to 1,0. The correspondance of the test results in the group of color- deficient subjects was 1,0 and the 95%- confidence interval was within 0,71 and 1,0. The correspondance of the data of different color plates differed from 0,66 to 1,0 in this group.
Conclusions: The web-based color vision test with luminescence color plates at color-efficient and color-deficient subjects delivers comparable test results like pigment color plates under standardized examination conditions. Further studies are needed to examine if the web-based color vision test can be used also as internet screening test.