ACHOO Syndrome is characterized by uncontrollable sneezing in response to sudden exposure to bright light, typically intense sunlight. Photic sneezing is another name for this type of sneezing. One in every four people who already have a prickling sensation in their nose will sneeze in response to sunlight, but "pure" photic sneezing is much rarer. Sneezing is typically caused by contact with infectious agents or inhaling irritants, but the cause of photic sneezing is unknown. For Further information about Autosomal Dominant Compelling Helio ophthalmic Outburst Syndrome visits here.