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Pyrus
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Why do some people sneeze on exposure to light?
Bystander said:
*groan*wikipedia said:Autosomal Dominant Compelling Helio-Ophthalmic Outburst Syndrome (ACHOO)
This phenomenon is known as the photic sneeze reflex (PSR) or the ACHOO (autosomal dominant compulsive helio-ophthalmic outburst) syndrome. It is a genetic trait that affects about 18-35% of the population.
Yes, there are a few theories that attempt to explain this reflex. One theory suggests that the optic nerve, which controls the dilation of the pupils, is closely connected to the trigeminal nerve, which controls sneezing. Exposure to bright light can stimulate both nerves, triggering a sneeze. Another theory proposes that the PSR is an evolutionary adaptation to help clear irritants from the nose, such as dust or pollen, that may be present in bright sunlight.
The photic sneeze reflex is a genetic trait, meaning it is inherited from one or both parents. It is estimated that about 80% of people with the PSR have inherited it from one of their parents.
Yes, in some cases, not only bright light but also other stimuli such as sudden temperature changes, spicy foods, or plucking eyebrows can trigger the PSR. However, the most common trigger is exposure to bright light.
There is currently no known treatment or prevention for the photic sneeze reflex. However, individuals who experience this reflex can try wearing sunglasses or avoiding sudden changes in light to minimize their chances of sneezing. If the reflex significantly impacts an individual's daily life, they should consult a doctor for further advice.