This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Retina, Subject name: Ophthalmology
[{'content': 'A young patient developed sudden painless loss of vision which recovers spontaneously over a period of 3 months. What is the most probable diagnosis? \nSelect and explain. \nA. Macular hole, B. Angle closure glaucoma, C. Retinal detachment, D. Central Serous retinopathy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Central serous choroidopathy is a focal disease of the retinal pigment epithelium and choriocapillris. Clinical features: More common in young males , sudden onset Blurring of vision accompanied by a positive scotoma and metamorphopsia The visual acuity is correctable by the use of convex lenses - makes the eye more hyperopic The visual acuity returns to normal within 3-6 months in most cases but some subjective symptoms persist. Argon laser burns may be applied to coagulate the leak if the oedema has persisted for 3 months or longer. FFA showing classical smokestack leak in CSR.', 'role': 'assistant'}]