Multifocal Electroretinography in Assessment of Macular Function after Internal Limiting Membrane Peeling in Macular Hole Surgery

Table 1

Amplitude of P1 and N1 and respective latency times before and after surgery.

Parameter	Before surgery ()	After surgery ()	value
P1 amplitude (nV/deg^2)
Ring 1	36.00 (77.20)	59.20 (92.60)	<0.001
Ring 2	45.70 (62.30)	55.30 (97.30)	0.040
P1 latency (ms)
Ring 1	33.30 (30.40)	34.30 (38.20)	0.806
Ring 2	33.30 (20.60)	34.30 (30.40)	0.955
N1 amplitude (nV/deg^2)
Ring 1	28.30 (127.30)	46.30 (155.30)	<0.001
Ring 2	20.80 (85.80)	22.60 (47.40)	0.550
N1 latency (ms)
Ring 1	17.60 (48.80)	18.60 (22.50)	0.330
Ring 2	17.60 (13.70)	17.60 (27.40)	0.977

Amplitude of P1 and N1 are expressed in nanovoltage (nV)/area degree² (deg²) and implicit time (latency) in milliseconds (ms). All values are expressed as median (range). values are obtained from the Wilcoxon signed-rank test.