| http://www.w3.org/ns/prov#value | - Optic nerve disease includes diseases such as ischemic optic neuropathy, which is the most common cause of vision loss in persons over age 50; Leber's hereditary optic neuropathy, an inherited disease that occurs most often in young men in their 20s; toxic optic nerve disease, in which nerve damage and blindness may result from certain medications, alcohol, and other substances; and glaucomatous o
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