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

Table 2

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

	Group 1 (fellow eyes)		Group 2 (vitrectomized eyes)
	Mean ± SD	Median	Mean ± SD	Median
RNFL nasal
Preoperative	90.27 ± 4.69	90.45	90.22 ± 4.43	90.35	0.810
1^st month	90.27 ± 4.69	90.40	93.37 ± 4.60	93.50	0.000
Preoperative-1^st month change	0.00 ± 0.05	0.00	3.15 ± 1.12	3.05	0.000
Intergroup change	0.691		0.000
2^nd month	90.26 ± 4.72	90.30	93.44 ± 4.60	93.25	0.000
Preoperative-2^nd month change	−0.01 ± 0.09	0.00	3.22 ± 1.15	3.35	0.000
Intergroup change	0.332		0.000
3^rd month	90.28 ± 4.71	90.35	92.18 ± 4.60	92.10	0.000
Preoperative-3^rd month change	0.01 ± 0.10	−0.05	1.95 ± 1.29	2.00	0.000
Intergroup change	0.416		0.000
6^th month	90.27 ± 4.72	90.25	90.30 ± 4.38	89.85	0.814
Preoperative-6^th month change	0.00 ± 0.11	−0.10	0.07 ± 1.63	0.20	0.445
Intergroup change	0.512		0.695
12^th month	90.25 ± 4.64	90.25	89.25 ± 4.38	89.20	0.067
Preoperative-12^th month change	−0.02 ± 0.20	−0.20	−0.98 ± 1.87	−1.15	0.028
Intergroup change	0.264		0.009

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