Table 2

 Image analysis standard deviation (SD) of repeated measures and discrimination (SD of repeated measures divided by the scale range) of edge detection (% coverage) and relative colouration (%) for the Annunziato, Efron, CCLRU, and Vistakon-Synoptik grading scales

SD repeated measuresDiscrimination (%)
Edge detectionColourationEdges detectionColouration
Bulbar hyperaemiaAnnunziato0.150.070.40.4
Efron0.320.010.50.2
CCLRU0.070.140.40.5
Vistakon1.770.018.64.3
Palpebral hyperaemiaAnnunziato0.240.073.50.6
Efron0.840.125.61.1
CCLRU0.090.070.50.5
Vistakon1.930.019.56.1
Palpebral roughnessCCLRU white light2.360.365.71.3
CCLRU Nafl0.900.483.86.7
Vistakon0.360.270.11.9
Corneal stainingAnnunziato0.080.010.60.4
Efron0.340.021.60.4
CCLRU0.660.184.44.1
Vistakon0.240.011.73.0