Searching Autosomal dominant compelling helio ophthalmic outburst syndrome, ACHOO Syndrome, also known as Photic Sneeze Reflex and photosneezia, is an inherited congenital autosomal dominant reflex in which a person sneezes repeatedly and uncontrollably when exposed to bright light, such as sunshine. Other stressors, like as intraocular injections, may also cause it. It is difficult to tell if it is a photic sneeze reflex or normal sneezing because it looks like normal sneezing.