The Effect of the Idiopathic Epiretinal Membrane and Surgically Induced Posterior Vitreous Detachment on the Retinal Nerve Fiber Layer

Table 1

Retinal nerve fiber layer thickness (μm) change in the superior quadrant of the groups.

	Group 1 (fellow eyes)		Group 2 (vitrectomized eyes)
	Mean ± SD	Median	Mean ± SD	Median
RNFL superior
Preoperative	140.85 ± 5.86	141.05	145.89 ± 5.88	145.90	0.000
1^st month	140.84 ± 5.84	141.05	150.76 ± 6.31	150.90	0.000
Preoperative-1^st month change	−0.01 ± 0.13	0.00	4.87 ± 1.37	4.80	0.000
Intergroup change	0.512		0.000
2^nd month	140.86 ± 5.88	141.00	150.88 ± 6.38	150.70	0.000
Preoperative-2^nd month change	0.01 ± 0.12	0.00	4.98 ± 1.36	4.85	0.000
Intergroup change	0.417		0.000
3^rd month	140.82 ± 5.87	141.00	150.05 ± 6.30	150.15	0.000
Preoperative-3^rd month change	−0.03 ± 0.11	0.00	4.16 ± 1.69	4.10	0.000
Intergroup change	0.269		0.000
6^th month	140.88 ± 5.86	141.10	147.20 ± 6.83	147.70	0.000
Preoperative-6^th month change	0.03 ± 0.19	0.00	1.31 ± 2.18	1.20	0.003
Intergroup change	0.272		0.000
12^th month	140.80 ± 5.84	141.05	143.35 ± 7.13	143.65	0.000
Preoperative-12^th month change	−0.05 ± 0.16	0.00	−2.54 ± 2.73	−2.40	0.000
Intergroup change	0.093		0.000

Wilcoxon test, RNFL- retinal nerve fiber layer, μm- micrometer, SD- standard deviation.