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.