The normal value of Arden index is: (A) 1, (B) 5-Jan, (C) Less than 18.5, (D) More than 1.85
Answer is D. Arden ratio = (Maximum 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. Reference : AK KHURANA COMPREHENSIVE OPHTHALMOLOGY, Edition4 , Page-490