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
All nerve are involved in superior orbital fissuresyndrome except ? 
Select and explain. 
A. 1t, B. 3rd, C. 4'h, D. 6th
A: 1t
Answer: A: 1t 
Explanation: 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).