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
Radial keratotomy is used as a treatment modality for – 
Select and explain. 
A. Small degree in myopia, B. Progressive non healing ulcer, C. High astigmatism, D. High hypermetropia
A: Small degree in myopia
Answer: A: Small degree in myopia 
Explanation: Radial keratotomy is used for low to moderate myopia (-2 to -6D).