Ophthalmology All of them are true about ERG except A Measures the potential difference of the neurosensory layer of retina B The negative A wave is produced by the hyperpolarization of the photoreceptors C The positive B wave is due to the bipolar and Muller's cells D Flash ERG is a good for detection of macular diseases 💡 Explanation All of them are true about ERG except ✓ Correct Answer: D. Flash ERG is a good for detection of macular diseases