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What is Electroretinography test and definition
Electroretinography is a test that measures the electrical activity of the RETINA’s rods and cones in response to light stimulation. The ophthalmologist places anesthetic drops in the EYE to numb it, then attaches an electrode to the surface of the CORNEA. The electrode detects electrical impulses on the retina when the ophthalmologist flashes a beam of light onto the retina, and sends signals to the electroretinograph machine.