Further syndromes commonly associated with photosensitivity include childhood epilepsy with occipital paroxysms, Dravet syndrome in up to 70% of patients, Unverricht-Lundborg disease in upwards of 90% of patients, and progressive myoclonic epilepsies (PME), including neuronal ceroid lipofuscinoses with CLN6 mutations, and Lafora disease [2, 4]. Here, CLN6 is linked to Unverricht-Lundborg disease.