Determination of Normal Values for Flash Electroretinogram (FERG) Test

Abstract

Electroretinography is the recording of the electrical potentials when the retinal cells are stimulated with flash light. In this way, the retinal visual pathways from photoreceptors to amacrine cells can be evaluated as a whole. In this manner, it is possible to evaluate the retinal visual pathways as a whole. In obtaining electroretinography signals; factors such as the device used, the electrode, the methods in the tests performed, and the laboratory conditions play an important role. The obtained signals vary depending on these factors. Therefore, it has become necessary to determine the normal values of each electrophysiological laboratory. In this respect, we aimed to determine normal values for flash electroretinography test. Flash electroretinography test was applied to individuals who did not have any ocular disease by using the device in Zonguldak Bulent Ecevit University Obesity and Diabetes Application and Research Center. All stages of the test were carried out in accordance with the recommendations of the International Society for Clinical Electrophysiology of Vision. Using the test results, the normal values were calculated in median and were presented with the upper and lower limits of 95% confidence interval. It is thought that the normal values determined may serve as a reference for newly established laboratory environments.