111 out of 120
The following are true about electro-retinography except (AIIMS Nov 2012)
|A||flicker ERG can be used to test cone function|
|B||ERG is normal in patient with macular degeneration|
|C||the b-wave is produced by the photoreceptor cells|
|D||c-wave is produced by the RPE cells|
Flicker ERG can be used to test cone function as rods do not respond to flashes with greater 15Hz frequencies.The a-wave is produced by the photoreceptor cells andthe b-wave by the bipolar and Muller's cells.