Association between Asymptomatic Unilateral Internal Carotid Artery Stenosis and Electrophysiological Function of the Retina and Optic Nerve

Table 4

Mean values (±standard deviation) of full-field ERG amplitudes and peak times in EIS, ECS, and control eyes.

Parameter	EIS	ECS	Control	value
				EIS versus control^a	ECS versus control^a	EIS versus ECS^b
Amplitude (μV)
Rod b-wave	82.08 ± 38.01	92.02 ± 38.99	98.6 ± 27.84	0.01	0.096	0.09
Rod-cone a-wave	159.46 ± 57.3	148.82 ± 49.18	177.15 ± 48.38	0.05	0.008	0.17
Rod-cone b-wave	381.18 ± 84.5	380.04 ± 88.6	397.09 ± 67.48	0.26	0.14	0.84
OPs wave index	98.05 ± 28.95	100.24 ± 28.25	114.46 ± 34.86	0.02	0.08	0.40
Cone a-wave single flash	26.56 ± 11.55	24.51 ± 11.81	29.44 ± 8.03	0.12	0.01	0.49
Cone b-wave single flash	83.87 ± 29.17	82.06 ± 25.93	89.18 ± 22.88	0.23	0.09	0.85
Cone b-wave 30 Hz flicker	70.07 ± 26.85	66.39 ± 26.31	76.64 ± 18.63	0.07	0.008	0.13
Peak time (ms)
Rod b-wave	112.12 ± 10.73	113.99 ± 9.65	105.71 ± 8.03	0.0004	<0.0001	0.12
Rod-cone a-wave	24.31 ± 1.58	24.32 ± 1.6	23.9 ± 1.07	0.02	0.007	0.91
Rod-cone b-wave	48.1 ± 3.45	48.11 ± 3.84	47.68 ± 2.83	0.11	0.09	0.85
Cone a-wave single flash	16.13 ± 1.51	16.11 ± 1.59	15.95 ± 1.2	0.74	0.87	0.96
Cone b-wave single flash	32.2 ± 1.92	32.23 ± 1.99	32.03 ± 1.64	0.68	0.43	0.77
Cone b-wave 30 Hz flicker	33 ± 0.86	33.05 ± 0.79	32.89 ± 1.06	0.82	0.89	0.99

^aMann–Whitney test; ^bWilcoxon signed-rank test.