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': 'True stereopsis is perceived due to the following- \nSelect and explain. \nA. Overlay of contours, B. Motion parallax, C. Bi- nasal disparity, D. Linear perspective', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Stereopsis is defined as the relative ordering of visual objects in depth, that is, in the third dimension.\nIt will be very lengthy to explain the physiology of stereopsis here. You remember following facts about stereopsis:-\n\nIt is the visual perception of three dimensions during binocular vision.\nNasal disparity (binasal disparity) gives the impression of remoteness of an object.\nTemporal disparity (bitemporal disparity) gives the impression of nearness of an object.', 'role': 'assistant'}]