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: Anatomy
[{'content': 'Highest visual resolution is seen in retina at? \nSelect and explain. \nA. Macula lutea, B. Foveola centralis, C. Blind spot, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The macula lutea contains a central depression, the fovea centralis or foveola, with a diameter of 0.4 mm, where visual resolution is highest. Here, all elements except pigment epithelium cone photoreceptors are displaced laterally. The minute size of the foveola is the reason why the visual axes must be directed with great accuracy in order to achieve the most discriminative vision.', 'role': 'assistant'}]