VEP provides information regarding conduction in visual pathway from the retina to brain (occipital cortex).
VEP is recommended for following diseases:

Impairment of vision due to:

• Multiple Sclerosis
• Optic Neuritis
• Tumours of the brain (pituitary tumours)
• Head injuries
• Drugs which may cause visual impairment
• In children with mental retardation/ delayed development to assess visual status

Details of Procedure

• The test is performed in dark room.
• Each eye is tested separately.
• The patient is asked to focus on a point on the monitor, which shows
• Checkerboard pattern.
• Small metals plates (electrodes) are applied to the head, which record the
• Electrical potential.
• The procedure usually take approximately 30 minutes.

Instructions

• Hair should be washed, dried, with no oil, gel, spray etc.
• If the patient is using spectacles or contact lenses than he/she should wear them at the time of examination.
• For children who are uncooperative sedation may be required.