This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acoustic Neuroma, Subject name: ENT
In acoustic neuroma, the earliest ocular finding is: 
Select and explain. 
A. Diplopia, B. Ptosis, C. Loss of pupillary reflex, D. Loss of corneal reflex
D: Loss of corneal reflex
Answer: D: Loss of corneal reflex 
Explanation: Ans: d (Loss of corneal reflex)Ref: Dhingra E.N.T. 3rd ed, p. 144 & 2nd ed, p. 116. 5th nerve is the earliest nerve to be involved. This leads to reduced corneal sensitivity and loss of corneal reflex.