This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
Choose the local anaesthetic that is specifically used to produce corneal anaesthesia for tonometry 
Select and explain. 
A. Tetracaine, B. Ropivacaine, C. Oxethazaine, D. Benoxinate
D: Benoxinate
Answer: D: Benoxinate 
Explanation: Benoxinate:- It is a good surface anaesthetic for the eye; has little irritancy. A 0.4% solution rapidly produces corneal anaesthesia sufficient for tonometry without causing mydriasis or corneal damage. Ref:- kd tripathi; pg num:-367