Electro-Retinography (ERG) / Electro-oculography (EOG) is used to measure the electrical responses of various cell types in the retina, including the light-sensitive cells (rods and cones) and the ganglion cells.

The ERG / EOG is used for the diagnosis of various retinal diseases :

  • Retinitis Pigmentosa and related hereditary degenerations
  • Leber’s Congenital Amaurosis
  • Choroideremia
  • Gyrate Atrophy of the Retina and Choroid
  • Goldman-Favre Syndrome
  • Congenital Stationary Night Blindness
  • X-linked Juvenile Retinoschisis
  • Achromatopsia
  • Cone Dystrophies

The multifocal ERG is used to record separate response for different retinal locations

Visual Evoked Potential (VEP) is useful for the diagnosis of :

  • Optic Nerve disorders
  • Unexplained Visual Loss
  • Malingering
  • Detecting Blindness in patients that cannot communicate such as babies or unconscious patients.