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': "All nerve are involved in superior orbital fissuresyndrome except ? \nSelect and explain. \nA. 1t, B. 3rd, C. 4'h, D. 6th", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is\'a\' i.e., 1" Superior orbital fissure syndrome The superior orbital fissure is a cleft between the lesser and greater wing of sphenoid. The structures passed through superior orbital fissure are 3rd,4th,6rn nerve, ophthalmic division of Sth nerve, superior & inferior division of ophthalmic vein and sympathetic fibres. Therefore symptoms of superior orbital fissure syndrome are same as in cavernous sinus thrombosis, i.e., painful ophthalmoplegia :- Pain (retro-orbital pain) and sensory disturbances in the V1(ophthalmic division of 5th nerve)distribution Ipsilateral ophthalmoplegia Ord 4th and 6th nerve involvement).', 'role': 'assistant'}]