[Efficiency of the photostimulation in activation of the EEG paroxysmal disorders in children depending on frequency spectrum of the luminous stimulus--preliminary report]. / Efektywnosc próby fotostymulacji w aktywacji zmian o charakterze napadowym w zapisie EEG u dzieci w zaleznosci od widma czestotliwosci bodzca swietInego--doniesienie wstepne.

INTRODUCTION: Photostimulation is considered as a factor that may induce epileptic seizures, hence it has been implemented to neurological diagnostics in children as a component of electroencephalographic examination. The response to light stimulus is called photosensitivity. The impact of elimination of red light on the response to photostimulation has been widely discussed in current papers. However, there is no report concerning the Polish population. AIM: The aim of this study was to evaluate the efficacy of blue-filtered lenses (Z1) in children with photosensitivity. MATERIAL AND METHODS: The study was based on the analysis of EEG records in 61 patients aged 5-18 years (21 M, 40 F) diagnosed with photosensitivity. The EEG studies were performed according to the standard protocol, according to clinical indications. CONCLUSIONS: Epilepsy was diagnosed in 30 cases (49%), the remaining 31 patients (51%) presented with other symptoms. A positive response to Z1 lenses was observed in 40 cases (66%), including 18 children with the diagnosis of epilepsy (60% of this group) and 22 patients from the second group (71%). The use of blue-filtered lenses may support the treatment of epilepsy. This method is characterized by safety, efficiency over 50% and relatively low cost. The use of blue-filtered lenses may help to reduce symptoms in children with photosensitivity.