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How does an ERG work?

Published on
December 2, 2022

RETeval ERG is an amazing device that provides comprehensive information about your retina's functionality. The retina is the back part of the eye that detects light entering our eyes. And it converts that light signal into an electrical signal for your brain to then respond to, and interpret the information that entered your eye. 

What to expect during a RETeval ERG test?

RETeval ERG device records both the strength and the speed of the electrical response generated by your retina by shining a series of flashes of light into the eye. And the way that this electrical response is detected is by placing sensor strips right under your eye.

First, we will prepare your skin for this test. We will use a skin preparation gel to get rid of any sort of essential oils on your face and to make sure your face is clean and dry, so that the sensor strips can detect the electrical signal generated by your retina when we place them under that. When we've placed the sensor strips on your eye and prepped your skin, we'll attach the electrodes of the device to the sensor strips. Next, we'll ask you to cover your non-tested eye and flash a series of lights into your other eye. You will have to focus on the red light that will enter your eyes. Typically, this typically takes just around a minute and afterwards, we will test the other eye. 

What conditions can RETeval ERG diagnose?

We invested in the most advanced technologies at Amplify EyeCare to enable our optometrists to have the best tools to detect eye disease earlier, and provide the best options for management and treatment of a variety of eye diseases and conditions. ERGs are useful in diagnosing inherited and acquired retinal disorders. In addition, ERGs can be used to monitor progression of different diseases. Following are the conditions for which RETeval ERG is useful for: 

  • Diabetes
  • Glaucoma
  • Cataracts
  • Elevated blood pressure
  • Nystagmus 
  • Amblyopia
  • Diabetic retinopathy
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