The purpose is to study for the first time the vascular plexuses and the retinal nerve fiber layer and raphe of a patient with a very uncommon anatomical variation: an anomalous retinal artery supplying the whole macula. We used multimodal imaging, en face spectral-domain optic coherence tomography, and spectral-domain optic coherence tomography angiography. One patient presented in his left eye a very unusual anatomical variation of macular vascularization. A retinal artery deriving from the inferior temporal retinal artery irrigated the whole macula. The formation of the papillomacular bundle and the temporal raphe nerve fiber layer has been attributed to the earlier development of the central retina and to the existence of 2 distinct watershed zones. However, there are very uncommon anatomical variations of the retinal vasculature in which large retinal vessels cross the raphe and could influence the morphology and structure of the nerve fiber layer of the posterior pole. We review the literature on the subject and document for the first time an anomalous artery that irrigates the whole macula, normal thickness and morphology of the nerve fiber layer, and the temporal raphe.
Case Rep Ophthalmol 2021;12:773–777

中文翻译：

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异常视网膜动脉的多模态成像、OCT En Face 和 OCT 血管造影：病例报告和文献回顾

目的是首次研究具有非常罕见解剖变异的患者的血管丛和视网膜神经纤维层和中缝：供应整个黄斑的异常视网膜动脉。我们使用了多模态成像、正面谱域光学相干断层扫描和谱域光学相干断层扫描血管造影术。一名患者的左眼呈现出非常不寻常的黄斑血管化解剖变异。来自颞下视网膜动脉的视网膜动脉冲洗整个黄斑。乳头黄斑束和颞缝神经纤维层的形成归因于中央视网膜的早期发育和2个不同分水岭区的存在。然而，视网膜脉管系统存在非常罕见的解剖变异，其中大的视网膜血管穿过中缝并可能影响后极神经纤维层的形态和结构。我们回顾了有关该主题的文献并首次记录了一条异常动脉，该动脉灌注整个黄斑、神经纤维层的正常厚度和形态以及颞缝。
Case Rep Ophthalmol 2021；12:773–777