This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': 'A 55 year old male with vision 6/12 in both eyes, complaints of Glare at night, especially while driving. What could be the possible diagnosis? \nSelect and explain. \nA. Diabetic retinopathy, B. Age related macular degeneration, C. Corneal degeneration, D. Opacification of lens', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Opacification of lensRef: Kanski 7/e, p. 270; Khurana 6/e, p. 191Subcapsular cataract (Posterior) - patients are particularly troubled by conditions of miosis such as produced by headlights of oncoming cars and bright sunlight. This is one of the earliest visual disturbances with cataract', 'role': 'assistant'}]