Manouchehrifar M, et al. - Considering the significance of differentiating between ischemic and hemorrhagic strokes in the treatment process of these patients, researchers evaluated the diagnostic accuracy of ultrasonographic optic nerve sheath diameter (ONSD) in differentiating between the two. They studied 80 patients with stroke (40 hemorrhagic and 40 ischemic). They identified ultrasonographic diameter of optic nerve sheath as moderately accurate in differentiating hemorrhagic and ischemic stroke.