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An electroretinogram is a diagnostic procedure that evaluates the function of the retina, the light-sensitive lining on the back of the eye where light is focused. The retina can be affected by several different conditions that can lead to serious complications, including permanent vision loss.
During the electroretinogram procedure, the cells of the retina release electric responses to the flashes of light. By measuring these electrical responses to the light under varying conditions, your doctor can determine how well the retina is working. This is done by placing a contact lens on the eye to record responses to a series of lights. A multifocal electroretinogram measures responses from multiple retinal areas using an array of light signals. The results of this exam are then analyzed through a special map of the eye.
The entire electroretinogram procedure typically takes 30 to 45 minutes to perform and can be done in your doctor’s office. This procedure is performed with dilated pupils in order to achieve the most accurate results.