photoepilepsy UK /ˌfəʊ.təʊˈɛpɪˌlɛp.si/US /ˌfoʊ.toʊˈɛpɪˌlɛp.si/ noun1 •Photosensitive epilepsy.I was unable, however, to find literature indicating a higher incidence of migraine in patients with photoepilepsy. — 2003 formsphotoepilepsies