Diagnosis may be made by noting the correlation between exposure to specific visual stimuli and seizure activity. More precise investigation can be carried out by combining an EEG with a device producing intermittent photic stimulation (IPS). The IPS device produces specific types of stimuli that can be controlled and adjusted with precision. The testing physician adjusts the IPS device and looks for characteristic anomalies in the EEG, such as photoparoxysmal response (PPR), that are consistent with<unk>  and/or may herald the onset of seizure activity. The testing is halted before a seizure actually occurs. Sometimes diagnostic indicators consistent with<unk>  can be found through provocative testing with IPS, and yet no seizures may ever occur in real-life situations. Many people will show<unk> -like abnormalities in brain activity with sufficiently aggressive stimulation, but they never experience seizures and are not considered to have<unk> .
Photosensitive epilepsy
Vertiginous epilepsy
Northern epilepsy syndrome
Musicogenic epilepsy
Generalized epilepsy
Temporal lobe epilepsy
Nocturnal epilepsy
Occipital epilepsy