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': '. Aniseikonia refers to \nSelect and explain. \nA. Difference in the corneal diameter, B. Difference in the image size (retinal image, C. Difference in the refractive power, D. Difference in image colour', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Difference in the image size (retinal image', 'role': 'assistant'}]