This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Homonymous hemianopia is seen in lesion of -a) Optic tractb) Optic chiasmac) Optic radiationd) Optic nervee) Occipital cortex \nSelect and explain. \nA. ace, B. bde, C. cde, D. ade', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Important facts about visual pathway lesions\n\nHomonymous hemianopia occurs in lesions of optic tract, lateral geniculated body, total optic radiation, anterior occipital cortex.\nPupillary reflex is normal in lesions beyond optic tract (lateral geniculate body, optic radiation, occipital cortex) as fibres responsible for pupillary reflex leave optic tract to reach pretectal nucleus.\nDescending optic atrophy does not occur in lesions beyond lateral geniculats body as the 2nd order neurons (optic nerve fibres) synapse in lateral geniculate body.', 'role': 'assistant'}]