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
The thickness of the cornea is measured by using – 
Select and explain. 
A. Schiotz tonometer, B. Keratometer, C. Pachymeter, D. Aesthesiometer
C: Pachymeter
Answer: C: Pachymeter 
Explanation: Pachymetry is used to measure thickness of cornea.