Photic stimulation: Standardization of screening methods

Purpose: Differences in methodology of intermittent photic stimulation with in and between countries in Europe make collaborative research and interpre tation of results difficult. Method: Experts in the field of photic stimulation from European countries have given an overview of methods used in routine photic stimulation. A con sensus meeting was organized in May 1996 in the Netherlands. Results: Methodology, including specification of a photo stimulator, proced ure of photic stimulation, and interpretation of EEG results, has been defi ned according to available scientific and clinical knowledge. Conclusions: Consensus was reached in setting up a safe, quick, simple and reliable method to determine whether or not patients are photosensitive. A specification of an international standard for intermittent photic stimulat ion in the routine EEG examination is given with the purpose of improving p atient care and facilitating collaborative research.