The complex microstructures of optic nerve head(ONH)can be observed in vivo with the development of optical co-herence tomography,which deepens the acknowledgement of many clinical entities.This article elucidates the observable microstruc-tures of ONH such as the marginal tissues of Elschnig and their clinical applications.The etiology,pathophysiological mechanism,nom-ination,differential diagnosis and prognosis of optovenous collateral is explored and analyzed in depth based on description of blood supply of ONH.(Ophthalmol CHN,2024,33:321-328)
optic nerve headthe marginal tissues of Elschnigoptovenous collateraloptic disc neovascularization
维普
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