Electroretinographic campimetry in a patient with crystalline retinopathy.

We report the findings we obtained by multifocal electroretinography (ERG) in a patient with crystalline retinopathy. Although the conventional Ganzfeld (full-field) ERG was within the normal range, the amplitudes were reduced and implicit times were delayed in the parafoveolar region in the multifocal ERG. To our knowledge, this is the first report on crystalline retinopathy investigated with this spatially differentiating electrophysiologic method, which is useful for the detection of early change in this disease.