This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Budd chiari syndrome & Pancreatitis, Subject name: Medicine
Patient of acute pancreatitis developed sudden loss of vision the most likely cause is: 
Select and explain. 
A. Puscher's retinopathy, B. Hyperglycemia, C. Hypoxia, D. CRVO
A: Puscher's retinopathy
Answer: A: Puscher's retinopathy 
Explanation: Puscher's retinopathy, a relatively unusual complication, is manifested by a sudden and severe loss of vision in a patient with acute pancreatitis. It is characterized by a peculiar fundoscopic appearance with cotton-wool spots and hemorrhages confined to an area limited by the optic disc and macula it is believed to be due to occlusion of the posterior retinal aery with aggregated granulocytes.