Visual Diagnosis Tests « Lady Bjelke-Petersen Community Hospital

Visual Diagnosis Tests

There are a number of tests performed at QEDIC.  These include:

Electro-oculogram (EOG) –measures retinal function with standardised eye movements.

Electroretinogram (ERG) – measures the electrical responses of various cell types in the retinal and is used to diagnosis various retinal diseases.  Variations of this test include: the Bright Flash Electroretinogram (Bright Flash ERG), the Pattern Electroretinogram (PERG) which is used to assess retinal ganglion cell functioning diseases like glaucoma, and the Multifocal Electroretinogram (MFERG) which is used to record responses for different retinal locations.

Visual Evoked Potential (VEP) – measures the functional integrity of the visual pathways from the retina to the visual cortex of the brain via the optic nerve.  Variations of this test include: the Flash Visual Evoked Potential (Flash VEP), Pattern Visual Evoked Potential (Pattern VEP), the Special Visual Evoked Potential (Special VEP), and the Multifocal Visual Evoked Potential

Other tests performed include Colour Vision.

Indications for Specific Tests

Provisional Diagnosis EOG ERG Bright Flash ERG PERG Flash VEP Pattern VEP Special VEP mfERG mfVEP
Inherited retinal dystrophies
Vascular diseases (inc. diabetes)
Opaque media or trauma
Retrobulbar neuritis
Unexplained visual loss
Infant with questionable vision
Toxic & neutritional eye disease
Suspected intracranial lesion


For further information on electro-diagnostics tests and their indications, please visit

For the health and safety of our patients, staff and visitors, we ask you do not enter the Lady Bjelke-Petersen Community Hospital if you:

  • Have been in contact with a known case of COVID-19
  • Have recently travelled overseas or interstate and have NOT undergone a two week quarantine
  • Are awaiting COVID-19 test results
  • Have cold or fever symptoms (sore throat, coughing, sneezing etc)
  • Recently visited a COVID-19 hot spot (as identified on the Queensland Government website)

Please note that all visitors at this time will undergo contactless temperature checking. Our staff will also require the full names and contact details of all visitors to the building.

Thank you for your cooperation at this time, please don't hesitate to contact us on 07 4162 1444 if you have any concerns.