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
Maddox rod test is used for testing ? 
Select and explain. 
A. Macular function, B. Lens opacity, C. Amount of tear production, D. Vitreous hemorrhage
A: Macular function
Answer: A: Macular function 
Explanation: Ans. is 'a' i.e., Macular function