The results recorded in the patients who underwent counter-testing suggest that, if handled correctly, the web-based color vision test can be used as a color vision screening test on the internet.
The HRT is able to detect a peripapillary RNFL thinning in cases with ONHD. The mean RNFL thickness correlated with the loss variance. The HRT should be used to perform a quantitative and objective topometric analysis in cases with ONHD.
The web-based colour vision test is a reliable screening test with good reproducible results as well under uncontrolled examination conditions. Subjects must perform the test with serious intent and should not aim at a positive test result by training or manipulation because of self-delusion. Test results are reliable if the time interval between test and retest is more than one day.
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