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
Not true about macular function test is: 
Select and explain. 
A. Two-point discrimination, B. Maddox rod, C. Laser interferometry, D. Retinogram
D: Retinogram
Answer: D: Retinogram 
Explanation: Ans.Retinogram