investigate the visual pathways and retina.
The Electro-retinogram (ERG)
The ERG is a small response that is generated by the retina in
response to light. Responses are recorded by a thread electrode
placed along the lower eyelid. In small children disposable sticky
electrodes are placed on the cheeks just below the eyes.
Visual Evoked potentials (VEP) are recorded from small electrodes
attached to the back of the head using a soft cream. The small
electrodes are able to record very small responses generated by the
visual cortex in response to visual stimulation.
Electro oculogram is a response generated by the eyes as they
move from one side to another. The response is recorded from
disposable adhesive electrodes placed on either side of th eye.