Table 1. Comparison of ocular sonography between patients admitted to intensive care unit and controls.

	Patients admitted to intensive care unit N=34	Controls N=100
Optic nerve diameter (mm) Mean±SD	2.48±0.28	2.39±0.33
Optic nerve sheath diameter (mm) Mean±SD	5.86±0.69	4.38±0.41*

*p<0.01