Reliability in perimetric multichannel contrast sensitivity measurements

摘要: Background In this study, the reliability of perimetric contrast sensitivity measurements favouring achromatic, red-green and blue-yellow post-receptorial mechanisms was analysed. Methods A new technique, multichannel ATD perimetry, provides spatial temporal stimuli detection by an achromatic mechanism (A), from a magno or parvocellular origin (RG) chromatic mechanism, with (BY) koniocellular origin. The repeatability reproducibility these were studied in group 40 healthy subjects. analysis carried out on 21 testing points within 60° 40° fovea-centred region visual field. Results The within-observer for four is either good excellent when intra-class correlation coefficient (ICC) can be calculated. For remaining points, Friedman's test finds that are repeatable. between-observer cases where ICC applied according to all results reproducible. Conclusions The obtained showed A, RG BY stimuli, although slightly worse. Future studies diagnostic validity device based fact changes compared means single task, measurement using common metric.