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
Retinoscopy is used for visualising the: 
Select and explain. 
A. Whole retina, B. Only the peripheral pa of the retina, C. Detecting errors of refraction, D. None
C: Detecting errors of refraction
Answer: C: Detecting errors of refraction 
Explanation: Ans. Detecting errors of refraction