[Investigation of color vision using a web-based color vision test].
BACKGROUND
Screening tests of visual functions using the Internet are theoretically possible. To use these tests as a screening test, they must deliver comparable results with conventional test procedures. A web-based color vision test was developed based on pseudoisochromatic color plates.


METHODS
The 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. Sixty-five voluntary subjects, including nine color-deficient subjects, were examined by luminescence color plates (via web-based color vision test) and pigment color plates (via book). The statistical analysis was performed by determining the correspondence and the 95%-confidence interval.


RESULTS
The correspondence of the test results for all subjects was 0.98 and the 95%-confidence interval was within 0.91 and 0.99. The correspondence of the test results in the group of color-deficient subjects was 1.0 and because of the limited number the 95%-confidence interval was within 0.71 and 1.0.


CONCLUSIONS
The web-based color vision test with luminescence color plates for color-efficient and color-deficient subjects delivers test results comparable to pigment color plates under standardized examination conditions. Further studies are needed to examine if the web-based color vision test can also be used as an Internet screening test.
Kuchenbecker
J
J
Augenklinik, Universität, Magdeburg. joern.kuchenbecker@medizin.uni-magdeburg.de
Wecke
T
T
Wiermer
R
R
Röhl
F W
FW
Lindner
H
H
Behrens-Baumann
W
W
D000328:Adult; D003118:Color Perception; D003119:Color Perception Tests / Q000295:instrumentation / Q000379:methods*; D003117:Color Vision Defects / Q000175:diagnosis*; D016001:Confidence Intervals; D006801:Humans; D020407:Internet; D008163:Luminescent Measurements