Electroretinogram (ERG)

diagnostic-test-10The FERST Eye Institute is one of very few facilities that perform this test. The ERG is an electrical impulse given off by the eye when it is recording and sending signals to the brain. The eye creates a wave form that is recorded from the brain. This is much like the electrical cardio gram (ECG or EKG), which is an electrical impulse recorded on the chest from the heartbeat.