Involves applying click sound impulse repetitively over the ear and recording the response from scalp over the auditory cortex – much like EEG, to assess the sensitivity of ear (cochlea) and the integrity and maturity of the nerve of hearing (auditory nerve).
Involves seeing a checker pattern on TV or flashes of lights and recording the response from the scalp over vision area of the brain (much like EEG). This evaluates the function and status of the nerve of the eye (the Optic Nerve).
Involves recording response of retina (film in the eye) from a thin metallic thread placed under the eyelid, to a flash of light under dark adapted or light adapted condition. This way Rod and Cone function can be evaluated.
evaluates discrete areas of retina for their status which may be responsible for poor vision.