Multifocal Electroretinography in Assessment of Macular Function after Internal Limiting Membrane Peeling in Macular Hole Surgery
Table 2
Visual acuity and amplitude of P1 and N1 by photoreceptor status before and after surgery.
Parameter
Before surgery ()
After surgery ()
value
Intact photoreceptor
Visual acuity (logMAR)
2.10 (2.90)
0.70 (4.80)
0.007
P1 amplitude (nV/deg2)
Ring 1
37.70 (77.20)
59.00 (92.60)
<0.001
Ring 2
51.50 (39.70)
67.30 (97.30)
0.231
N1 amplitude (nV/deg2)
Ring 1
31.40 (120.80)
67.90 (117.80)
<0.001
Ring 2
20.30 (30.80)
24.80 (47.40)
0.571
Disrupted photoreceptor
Visual acuity (logMAR)
1.80 (1.60)
1.10 (2.00)
0.008
P1 amplitude (nV/deg2)
Ring 1
35.65 (48.10)
60.80 (82.20)
0.001
Ring 2
35.15 (62.30)
45.85 (80.20)
0.084
N1 amplitude (nV/deg2)
Ring 1
23.35 (127.30)
31.65 (155.30)
0.001
Ring 2
21.30 (85.80)
21.50 (40.20)
0.861
Amplitude of P1 and N1 are expressed in nanovoltage (nV)/area degree2 (deg2). All values are expressed as median (range). values are obtained from the Wilcoxon signed-rank test.