The full-field electroretinogram (ERG) is a widely used ocular electrophysiological test and we believe that a basic protocol should be standardized so that certain responses will be recorded comparably throughout the world. We propose that parameters be developed for five commonly obtained responses: 1. A response developed by the rods (in the dark-adapted eye) 2. A maximal response in the dark-adapted eye 3. Oscillatory potentials 4. A response developed by the cones 5. Responses obtained to a rapidly repeated stimulus (flicker) While this document is intended as a guide to practice, and will assist in interpretation of ERGs, we recognize that there are many additional techniques and protocols which certain laboratories may choose to employ. The Standard describes simple technical procedures that allow reproducible ERGs to be recorded under a few defined conditions. Different procedures can provide equivalent ERG responses. It is incumbent upon users of alternative techniques to demonstrate that their procedures do in fact produce signals that are equivalent in basic waveform, amplitude, and physiological significance to the Standard. Our intention is that the Standard methodology and responses be used widely, but not to the exclusion of other responses or additional tests that individual laboratories may choose or continue to employ. We also recognize that the investigation of certain eye conditions may not require all five of the Standard responses. In addition, specialized types of electroretinography (e.g. focal electroretinography, early receptor potential,