To review recent clinical data on ischemic optic neuropathies, which are some of the most frequently encountered optic neuropathies. These disorders include nonarteritic anterior ischemic optic neuropathy, arteritic anterior ischemic optic neuropathy, and posterior ischemic optic neuropathy. Recent studies have facilitated our understanding of the natural history of visual loss, recovery, and recurrence in these disorders. Additionally, the value of various diagnostic techniques and treatment options, particularly for arteritic anterior ischemic neuropathy, has been clarified. Application of the studies described in this paper should allow the clinician to more accurately diagnose ischemic optic neuropathies and counsel the patient with regard to appropriate management, prognosis for visual recovery and future risk of recurrence.

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The oxazolidinone antimicrobial linezolid is effective against gram-positive bacteria. Although maximal recommended therapy is 28 days, treatment durations greater than this are common. Linezolid may cause reversible optic neuropathy and irreversible peripheral neuropathy after months of treatment. Three cases of linezolid-induced optic and peripheral neuropathy are described, and previously reported cases of linezolid-induced optic neuropathy are reviewed. The mechanism of neural toxicity may be impairment of mitochondrial protein synthesis.