Table 2.

Comparison of N1 and P1 wave amplitude density and peak time of Mf-ERG 2 ring and Mf-ERG 3 ring.

	Groups	n	N1 wave amplitude density		N1 peak		P1 wave amplitude density		P1 peak
			Right eye	Left eye	Right eye	Left eye	Right eye	Left eye	Right eye	Left eye
Mf-ERG 2 ring	Observation group	11	40.16 ± 17.72	40.62 ± 15.40	24.80 ± 2.15	24.16 ± 2.78##	101.80 ± 16.08	109.66 ± 14.61	44.47 ± 2.33	45.19 ± 2.18∗#
	Control group	11	43.55 ± 11.06	46.32 ± 10.09	24.16 ± 2.02	25.41 ± 2.36	111.41 ± 22.10	122.56 ± 18.88	43.42 ± 1.64	42.78 ± 2.65
Mf-ERG 3 ring	Observation group	11	26.37 ± 9.58	21.60 ± 5.73∗∗	24.35 ± 1.50∗	24.16 ± 2.67	65.90 ± 15.38	67.41 ± 9.14	42.15 ± 2.32	43.49 ± 2.21#
	Control group	11	26.23 ± 5.47	27.94 ± 3.76	22.57 ± 2.22	23.46 ± 1.92	69.98 ± 11.95	74.06 ± 14.96	43.49 ± 1.59	43.75 ± 1.25

^∗ P < 0.05 compared with the control group, ^∗∗P < 0.01 compared with the control group, ^#P < 0.05 compared with the right eye, and ^##P < 0.01 compared with the right eye. These tests were repeated not less than 6 times.