Abstract
Retinal arteriolar macroaneurysms typically involve the second and third order arterioles. Macroaneurysms involving the first order arterioles, specifically overlying the optic nerve, have been infrequently reported. This is a retrospective case series. Two patients were found to have an arteriolar macroaneurysm overlying the optic nerve. The first, a 77-year-old man, had focal laser photocoagulation to the macroaneurysm. The second, a 75-year-old woman, had spontaneous resolution of the lesion without treatment. Final visual acuity was 20/25 in the treated patient compared to 20/80 in the untreated patient. Retinal arteriolar macroaneurysms overlying the optic nerve will involute spontaneously or as a result of focal laser photocoagulation. The associated macular edema may result in permanent visual loss. Focal laser treatment over the optic nerve did not cause optic nerve damage.
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