This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Optics and refraction, Subject name: Ophthalmology
Soft contact lens is used - 
Select and explain. 
A. High myopia, B. Astigmatism, C. Presbyopia, D. Keratoconus
A: High myopia
Answer: A: High myopia 
Explanation: Soft contact lenses are made up of HEMA (hydroxyethylmethacrylate) which is hydrophilic. These are very good for delivering higher concentrations of drugs in emergency treatment. Reference : A K KHURANA OPHTALMOLOGY,E4,Page-417,564