| ION | ischemic optic neuropathies |
| DM | diabetes mellitus |
| NAION | non-arteritic anterior ischemic optic neuropathy |
| GLP-1 | glucagon-like peptide-1 |
| BMI | body mass index |
| DP | diabetic papillopathy |
| DR | diabetic retinopathy |
| ONH | optic nerve head |
| BCVA | best-corrected visual acuity |
| OCT | optical coherence tomography |
| FAG | fluorescein angiography |
| FDA | Food and Drug Administration |
| e-NOS | endothelial nitric oxide synthase |
| NO | nitric oxide |
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