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. 2003 Nov;87(11):1381–1386. doi: 10.1136/bjo.87.11.1381

Table 2.

Grey scale values and range of grey scale values (mean (SD))

Grey scale values over whole image width Range of grey scale values
Fluorescence standard Background noise
HRA 169.68 (43.96) 11.21 (1.33) 158.46 (44.01)
Rodenstock cSLO 60.89 (12.76) 25.45 (0.65) 35.43 (12.82)
Zeiss cSLO 159.19 (22.34) 54.02 (5.58) 105.17 (19.62)