This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-ophthalmology, Subject name: Ophthalmology
Macular sparing is seen in the affection of- 
Select and explain. 
A. Optic nerve, B. Optic tract, C. Optic chiasma, D. Occipital lobe
D: Occipital lobe
Answer: D: Occipital lobe 
Explanation: Occipital lobe. Lesions of the visual coex. Congruous homonymous hemianopia (usually sparing the macula, is a feature of occlusion of posterior cerebral aery supplying the anterior pa of occipital coex. Congruous homonymous macular defect occurs in lesions of the tip of the occipital coex following head injury or gun shot injuries. Pupillary light reflexes are normal and optic atrophy does not occur following visual coex lesions. Ref: AK Khurana 4thE pg 290