This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Lisch nodule seen in ? \nSelect and explain. \nA. Sympathetic ophthalmitis, B. Neurofibromatosis, C. Chronic iridocyclitis, D. Trachoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Neurofibromatosis Lisch nodules are the most common type of ocular involvement in NF-1. These nodules are melanocytic hamaomas, usually clear yellow to brown, that appear as well-defined, dome-shaped elevations projecting from the surface of the iris.", 'role': 'assistant'}]