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【视神经管外科解剖学】视神经全程可分为颅内段、管段、眶内段三部分,全长约40mm。颅内段为自视交叉至视神经管的一段,有颅骨和脑组织保护,除严重的颅中窝底中央部骨折外,一般不易损伤;眶段亦称球后段,位于视神经管以外的眶内深处,周围有脂肪保护,且有活动余地,一般也不易受到损伤;唯有视神经的管段是容易受到损伤的部位。该段距内眦约45～50mm;长短因颅骨发育而不同,最短的约5.5 mm,最长约11.5mm。此骨管是由蝶骨小翼的上下两个根基与蝶骨体相接形成,横切面呈圆形,内侧紧邻蝶窦,使其外上方骨壁呈丘状或半管状隆起。该处骨壁甚薄,约0.2～0.3mm厚。外侧为前床突的根部。上界为颅前窝体,下壁为蝶骨小翼根
[Optic nerve tube surgical anatomy] The entire optic nerve can be divided into intracranial, tube, orbital segment of three parts, the total length of about 40mm. Intracranial segment from the optic chiasm to the optic canal of the tube, with skull and brain tissue protection, in addition to the central midfinger midfinger fracture, the general is not easy to damage; orbital segment also known as the ball, located in the orbit outside the optic canal Deep, surrounded by fat protection, and there is room for activity, are generally not vulnerable to damage; only the optic nerve of the pipe is vulnerable to injury sites. This section is about 45 ~ 50mm away from the internal;; the length varies with the development of skull, the shortest about 5.5 mm, the longest about 11.5mm. The bone is formed by the upper and lower sphenoid wing of the sphenoid small wing connected with the sphenoid body, the cross section is circular, the inner side close to the sphenoid sinus, so that the upper outer wall was mound or half tubular uplift. The bone wall here is very thin, about 0.2 ~ 0.3mm thick. The outer side of the bed for the root of the sudden. Upper bound for the skull antrum, the lower wall of the sphenoid wing root