Arden index is related to –
ERG (Electroretinogram)
EOG (Electroculogram)
VER (Visual Evoked response)
Perimetry
Arden index is related to Electrooculography
Interpretation of results:- Results of EOG are interpreted by finding out the Arden ratio as follows :

Arden ratio = Minimum height of light peak / Minimum height of dark trough  x 100

Normal curve values are 185 or above.
Subnormal curve values are less than 150.
Flat curve values are less than 125.