This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adverse Ocular Effects of Systemic Drugs, Subject name: Ophthalmology
[{'content': 'All of the following cause visual loss in hypertension EXCEPT: \nSelect and explain. \nA. Occipital infarct, B. Anterior ischemic optic neuropathy, C. Papilloedema, D. Hemorrhage', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) Occipital infarctREF: Khurana 4th ed p. 297, style="font-size: 1.04761904761905em; font-family: Times New Roman, Times, serif; margin: 0 0 8pt 8px; text-indent: 0; text-align: left">Causes of anterior ischemic optic neuropathy:IdiopathicGiant cell arteritisPapilloedemaMigraineMalignant hypertensionHypertension is a known cause of papilloedema. Hemorrhage in the vitreous is caused by hypertensionTherefore by exclusion the answer is occipital infarctsFurther the article states that occipital infarcts are different from other infarcts because their etiology is also different and hypertension is not a usual cause', 'role': 'assistant'}]