The Changes of Retinal Saturation after Long-Term Tamponade with Silicone Oil

Table 5

Differences in retinal vessel diameter before and 2 months after silicone oil removal.

Duration	Arterioles			Venules
	Width (pixels)			Width (pixels)
	Before surgery	After surgery	P value	Before surgery	After surgery	P value
3–6 months ()	11.3 ± 1.1	11.2 ± 0.7	0.893	14.3 ± 1.6	14.4 ± 1.8	0.928
6–9 months ()	11.3 ± 0.8	11.2 ± 0.9	0.599	14.1 ± 1.4	13.9 ± 0.8	0.561
>9  months ()	10.4 ± 0.9	10.8 ± 0.7	0.015	14.1 ± 1.1	14.0 ± 1.1	0.770
Total ()	11.0 ± 1.0	11.1 ± 0.7	0.366	14.2 ± 1.4	14.1 ± 1.3	0.716

Compared by paired -test.