What examination findings are indicative of bilateral optic neuritis or optic neuropathy as the underlying cause of bilateral vision loss?   

This is a general question, and the answer is very broad. Also, optic neuropathy and optic neuritis have different meanings. In summary, diagnosis of optic neuropathy is made by general eye exams, including visual acuity, pupillary exams, color vision, visual field, and examination of the anterior a...