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Surgery
A 25-year-old man presents with acute, painless loss of vision in the right eye. The appearance of the optic nerve of the right eye is hyperemic. Of the entities listed, the most likely cause may include:
Vitamin BI2 deficiency
Ethambutol hydrochloride toxicity
Leber hereditary optic neuropathy (LHON)
Dominant optic atrophy
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