Table 2.

Average PERG amplitude, phase, noise, SNR and associated variability of recordings for healthy eyes (n = 66) and patient eyes (n = 90), both within- and between-trials.

		Healthy eyes		Patient Eyes
		Within-trials	Between-trials	Within-trials	Between-trials
Amplitude (µV)	Mean (SD)	0.83 (0.27)	0.81 (0.26)	0.57 (0.25)	0.56 (0.23)
	Noise (SD)	0.17 (0.08)	N/A	0.19 (0.08)	N/A
	SNR (SD)	5.88 (3.02)	N/A	3.75 (3.47)	N/A
	Sw ± 1.96se	0.08 ± 0.01	0.08 ± 0.02	0.06 ± 0.01	0.06 ± 0.01
	CV% (SD)	11.5 (11.5)	9.9 (7.9)	12.2 (10.01)	11.2 (7.5)
	ICC (95% CI)	0.91 (0.86, 0.94)	0.85 (0.77, 0.095)	0.92 (0.88, 0.95)	0.89 (0.83, 0.92)
Phase (π rad)	Mean (SD)	1.82 (0.09)	1.81 (0.03)	1.81 (0.13)	1.81 (0.13)
	Sw ± 1.96se	0.02 ± 0.006	0.03 ± 0.006	0.04 ± 0.008	0.04 ± 0.008
	CV% (SD)	1.3 (1.5)	1.5 (1.4)	2.2 (2.2)	2.4 (2.2)
	ICC (95% CI)	0.85 (0.77, 0.91)	0.88 (0.81, 0.92)	0.82 (0.74, 0.88)	0.83 (0.75, 0.88)