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': 'Earliest clinical feature of Senile cataract \nSelect and explain. \nA. Glare, B. Frequent change of glasses, C. Coloured halos, D. Uniocular polyopia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Earliest clinical feature of Senile cataract is Glare\nMost common symptom at presentation is Frequent change of glasses', 'role': 'assistant'}]