![]() įurther studies have revealed this mechanism to be inherited. The study also found that photic sneezing was significantly more common in people with a deviated nasal septum. Ī survey conducted by the School of Optometry at the University of Alabama at Birmingham found that 67% of respondents who identified as photic sneezers were female and 94% were Caucasian. This reflex seems to be caused by a change in light intensity rather than by a specific wavelength of light. Photic sneezing Ī photic sneeze results from exposure to a bright light and is the most common manifestation of the photic sneeze reflex. The sneezes generally occur in bursts of 1 to 10 sneezes, followed by a refractory period that can be as long as 24 hours. The photic sneeze reflex manifests itself in the form of uncontrollable sneezing in response to a stimulus which would not produce a sneeze in people without the trait. The condition affects 18–35% of the world's population, but its exact mechanism of action is not well understood. The photic sneeze reflex (also known as Autosomal Dominant Compelling Helio-Ophthalmic Outburst ( ACHOO) syndrome or photoptarmosis, of the combining form from Ancient Greek φῶς, phōs, "light" and πταρμός, ptarmós, "sneeze", colloquially sun sneezing or photosneezia) is an inherited and congenital autosomal dominant reflex condition that causes sneezing in response to numerous stimuli, such as looking at bright lights or periocular (surrounding the eyeball) injection. ![]() Photic sneeze reflex is inherited in an autosomal dominant manner Autosomal Compelling Helio-Ophthalmic Outburst, Photosneezia ![]()
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