Electroretinography

About Electroretnography (ERG)

Your doctor is conducting an ERG test because they would like to have more comprehensive information on the function of your retina. The retina is the layer in the back of your eye that responds to light. When light is detected by your retina it is converted into an electrical signal.

The RETeval® device performs an ERG test that records the speed and strength of the electrical response of your retina when stimulated by a series of flashes of light. The signal is collected through the Sensor Strips – little stickers located under your eye, similar to what is used during an electrocardiogram (ECG) testing.

The device will automatically compare your results to a healthy population of patients of the same age. It will flag any abnormalities and will help your doctor in the diagnosis and treatment of many vision disorders.

How is an ERG test done?

• The technician will prepare the skin under your eyes where the Sensors Strips will be placed to be clean, dry and free of any lotions or oils. This will ensure that the sensors can detect the electrical signal generated by your retina.

• The technician may ask you to cover the non-tested eye and will place the RETeval® device in front of your eye.

• You will see a red fixation light and a series of flashes of light. Continue to look at the red light for the duration of the test. Make sure to follow the technician’s instructions.
  
  

How to perform an ERG test on the RETeval device: