Retinal hemorrhage, and blurring of the optic dise cause visual disturbances.
视网膜出血及神经盘模糊等可导致视力障碍。
Postoperatively, the visual damage and optic field defect were recovered in 18 cases, while 12 cases were unchanged.
术后视力损害和视野缺损均有不同程度恢复18例，12例视力无改变，2例视力下降。
The group B, 12 cases, was that with fracture of optic nerve canal and visual disfunction. The decompression of optic nerve canal was performed.
组共12例为视神经管骨折，术前患者有不同程度的视力障碍，行视神经管减压。
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