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。
Following the initial insult optic nerve swelling within the optic nerve canal or compression by bone fragments are thought to result in secondary retinal ganglion cell loss.
一般认为受伤时视神经管内视神经肿胀或骨碎片压迫视神经，会引起续发性的网膜神经节细胞丧失。
Objective: To explore the endoscopic surgical anatomy of optic canal and establish an anatomic basis for endoscopic optic nerve decompression.
目的：为内窥镜下经鼻蝶入路进行视神经管减压的手术方法建立解剖学基础。
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