视神经减压术管内鞘切开部位宜选择在鞘的外、上壁交界外。
It would be safe to incise the superior lateral wall of intra canal optic sheath in the decompression of optic nerve.
肿瘤影响邻近骨骼并侵犯几乎所有眼眶结构：眼球，眼外肌，视神经鞘以及感觉神经分支。
Tumors affect nearby bone and invade almost all orbital structures, including: globe, extraocular muscles, optic nerve sheath, and branches of sensory nerves.
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