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
To prevent keratoconus what is used – 
Select and explain. 
A. Antibiotics, B. Cycloplegics, C. Glasses, D. None
D: None
Answer: D: None 
Explanation: There are no preventive measures for keratoconus.
Some specialists believe that patient with keratoconus should have their eye allergies aggressively treated and should be instructed not to rub their eyes