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Electrophysiology Test

The Light falling on the eye produces electrical waveforms which are displayed and analysed in electrophysiology testing. It includes

  • Electroretinography (ERG)
  • Visual Evoked Potentials (VEP) and
  • Electrooculogram (EOG)

The primary objective of the electrophysiological examination is to assess the function of the visual pathway from the photoreceptors of the retina to the visual cortex of the brain. Information obtained from these diagnostic tests helpsto provide information about the visual system beyond the standard clinical examination of the eye and to establish the correct diagnosis or helps to rule out related ophthalmic diseases.

Electrophysiological testing is useful in diagnosing a variety of inherited retinal and optic nerve diseases, toxic drug exposure, inflammatory conditions, intraocular foreign bodies, and retinal vascular occlusions.

The data is used in conjunction with the clinical examination and other tests (perimetry, dark adaptometry) to establish a correct diagnosis.