Question:
Arden Index is related to:
Arden Index is related to:
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It is a light peak to dark trough ratio of the standing corneo-retinal potential.
Updated On: Jun 24, 2026
- ERG (Electroretinogram)
- EOG (Electrooculogram)
- VER (Visual Evoked Response)
- Perimetry
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The Correct Option is B
Solution and Explanation
Step 1: The electrooculogram (EOG) measures the standing corneo-retinal potential. This potential changes between dark adaptation and light adaptation, and the EOG records that change as the eyes move.
Step 2: The Arden Index is the ratio of the maximum light-adapted potential (light peak) to the minimum dark-adapted potential (dark trough), usually expressed as a percentage.
\[\text{Arden Index} = \frac{\text{Light peak}}{\text{Dark trough}} \times 100\]
Step 3: A normal Arden ratio is about 185 percent or more. A value below roughly 150 to 165 percent is abnormal and points to a problem at the retinal pigment epithelium and photoreceptor interface, as in Best disease (vitelliform macular dystrophy).
Step 4: Therefore the Arden Index is a parameter of the EOG, so option B is correct.
Step 5: ERG (A) records the mass electrical response of the retina to a flash and uses a, b and c waves, not the Arden ratio. VER (C) measures the cortical response over the occiput. Perimetry (D) maps the visual field and is not electrophysiological. None of these use the Arden Index.
Hence the answer is Option B: EOG (Electrooculogram).
Step 2: The Arden Index is the ratio of the maximum light-adapted potential (light peak) to the minimum dark-adapted potential (dark trough), usually expressed as a percentage.
\[\text{Arden Index} = \frac{\text{Light peak}}{\text{Dark trough}} \times 100\]
Step 3: A normal Arden ratio is about 185 percent or more. A value below roughly 150 to 165 percent is abnormal and points to a problem at the retinal pigment epithelium and photoreceptor interface, as in Best disease (vitelliform macular dystrophy).
Step 4: Therefore the Arden Index is a parameter of the EOG, so option B is correct.
Step 5: ERG (A) records the mass electrical response of the retina to a flash and uses a, b and c waves, not the Arden ratio. VER (C) measures the cortical response over the occiput. Perimetry (D) maps the visual field and is not electrophysiological. None of these use the Arden Index.
Hence the answer is Option B: EOG (Electrooculogram).
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