Neurovascular compression is a rare but potentially treatable cause of optic neuropathy. Although incidental contact of the cisternal optic nerve and internal carotid artery (ICA) is common, compressive optic neuropathy occurring within the orbital apex has not been comprehensively described. We report a case of intra-orbital and intracanalicular optic nerve compression due to an ectatic ICA in a patient with congenital absence of the contralateral ICA. This report describes the complementary roles of advanced neuroimaging and neuro-ophthalmologic examination in rendering the diagnosis.

中文翻译：

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由于眶尖内扩张的颈内动脉压迫引起的视神经病变。

神经血管压迫是视神经病变的一种罕见但可能可治疗的原因。尽管脑池视神经和颈内动脉 (ICA) 的偶然接触很常见，但尚未全面描述发生在眶尖内的压迫性视神经病变。我们报告了一例先天性对侧 ICA 缺失患者因 ICA 扩张而导致眶内和小管内视神经受压的病例。本报告描述了高级神经影像学和神经眼科检查在诊断中的互补作用。