Table 1

Comparison of measurement from three imaging modalities

	488-FAF	450-FAF	450-RF
Mean absolute inter-reader difference (mm²)	0.46	2.01	0.25
CR (mm²)	1.35	8.13	1.08
CV	1.11	2.05	0.92
ICC	0.994	0.711	0.997
GA area (mm²), median (IQR)	2.1 (0.8–6.4)	1.0 (0.3–4.3)	2.6 (0.8–6.8)

CR, 95% coefficient of repeatability; CV, coefficient of variation; FAF, fundus autofluorescence; GA, geographic atrophy; ICC, intraclass correlation coefficient; 450-FAF, FAF with the 450 nm wavelength excitation light; 450-RF, image obtained from the elaboration of the ‘colour’ 450-FAF; 488-FAF, FAF with the 488 nm wavelength excitation light.