屈光质清晰和眼底正常的单眼视力障碍常暗示视交叉前视路的压迫或炎症。而两者的区分有时是困难的。CT扫描对影响眶部视神经的肿块易被证实,但对视神经炎则几乎没有有价值的报告。作者报告两例CT扫描见视神经增粗和密度增强的患者,临床分别确诊为球后视神经炎和视神经乳头炎。 Unilateral visual impairment, with a clear refractive index and normal retinal vision, often implies oppression or inflammation of the optic chiasm. The distinction between the two is sometimes difficult. CT scan of the affected orbit of the optic nerve of the orbital easily confirmed, but there is little report of optic neuritis valuable. The authors report two cases of optic nerve thickening and density enhancement seen on CT scans, clinically diagnosed as retrobulbar neuritis and optic neuritis.