photic sneeze reflex photic sneeze reflex Source photic sneeze reflex 18 and 35 percent of the population photic sneeze reflex photic sneeze reflex photic sneeze reflex photic sneeze reflex sneeze reflexively photic sneeze reflex ACHOO photic sneeze reflex photic sneeze reflex hasta en un 35% de la población "Why does bright light cause some people to sneeze?"