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
Arden index is related to - 
Select and explain. 
A. ERG, B. EOG, C. VER, D. Perimetry
B: EOG
Answer: B: EOG 
Explanation: Answer- B. EOG Arden index is related to ElectrooculographyInterpretation of results:- Results of EOG are interpreted by finding out the Arden ratio as follows :Normal curve values are 185 or above.Subnormal curve values are less than 150.Flat curve values are less than 125.