CHD2 and photosensitive epilepsy: In more than 500 patients with photosensitive epilepsy who performed CHD2 screenings, Galizia et al. discovered a CHD2 pathogenic variation or deletion; up to 3/36 (8.3%) of these patients went on to develop a seizure pattern accompanied with eyelid myoclonus (loci c.3725delA, c.4173dupA, c.C653T) (Table 1).