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. 2013 Sep 27;8(9):e75048. doi: 10.1371/journal.pone.0075048

Table 3. Interocular comparison of extraocular muscle volumes in patients with CPEO.

Anatomical side	Superior rectus	Inferior rectus	Medial rectus	Lateral rectus
	Mean ± SD (mm³)	Mean ± SD (mm³)	Mean ± SD (mm³)	Mean ± SD (mm³)
Left eye (n = 20)	556.4±27.0	502.5±26.8	514.0±17.2	593.6±24.6
Right eye (n = 20)	569.9±37.3	545.4±21.6	527.9±23.9	620.7±25.2
P value	0.7707	0.2205	0.6374	0.4469

The P value for each rectus muscle indicates the level of significance for the comparison between the left and right eye. SD = standard deviation.