This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
[{'content': 'A young adult male presented with sudden painless loss of vision. He recovered spontaneously within 3 months Most likely cause of his blindness is - \nSelect and explain. \nA. Central serous retinopathy, B. Macular hole, C. Myopic crescent, D. Vitreous haemorrhage', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Central serous retinopathy- spontaneous serous detachment of neurosensory retina in the macular region, with or without retinal pigment epithelium detachment. Risk factors - young adult male, type A personality, emotional stress, steroid intake, HTN, pregnancy. Sudden onset of painless loss of vision associated with metamorphopsia. Spontaneous resolution occurs in 80 to 90 % cases. Vision returns to normal or near normal with in 3 to 6 months. Ref khurana page no.288', 'role': 'assistant'}]