| ION | ischemic optic neuropathy |
| NA-AION | non-arteritic anterior ischemic optic neuropathy |
| A-AION | arteritic anterior ischemic optic neuropathy |
| OD | optic disc |
| ON | optic nerve |
| ONH | optic nerve head |
| RGC | retinal ganglion cell |
| VA | visual acuity |
| VF | visual field |
| IOP | intraocular pressure |
| RNFL | retinal nerve fiber layer |
| RAPD | relative afferent pupillary defect |
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