This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cataract, Subject name: Ophthalmology
[{'content': 'Second sight phenomenon is seen in \nSelect and explain. \nA. Nuclear cataract, B. Coical cataract, C. Senile cataract, D. Iridocyclitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Second sight - improved in near vision and presbyopia correct itself Nuclear cataract - Hemeralopia (day blindness) - Decreased distant vision - Seconded vision', 'role': 'assistant'}]