This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
Each of the following conditions may produce visual field defects similar to those seen in glaucoma except 
Select and explain. 
A. Chronic papilledema, B. Optic disc drusen, C. AION, D. Occipital infarction
D: Occipital infarction
Answer: D: Occipital infarction 
Explanation: Occipital infarction presents with macular sparing and can not presents with above mentioned field defects. The rest 3 option can closely mimic the glaucomatous field defects as they closely involve the optic disc similar to glaucoma.