Abstract
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Highlights
• Glaucoma is the most pathologic cause of optic disc cupping and usually occurs with elevated intraocular pressure.
• The non-glaucomatous optic neuropathies have more neuroretinal rim pallor with less excavation of the disc than
in glaucoma.
• Visual field examination, optical coherence tomography, or neuroimaging test help differentiate glaucomatous optic
neuropathy from non-glaucomatous one.