what is the name of phenomenon that cause sneeze in bright sunlight?

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Nice question. I wasn't sure there was a name for it, but I did find out! Thanks, and here's some info...

Close association between the eye’s optic nerve and nerves causing the sneeze reflex may explain why an estimated 5-25% of people sneeze with sudden exposure to bright sunlight or other light sources.

Sudden bright stimulation of the eye that occurs after a person has become adapted to darker surroundings is thought to bring on the condition, known as photic sneeze reflex. The reflex also is called Autosomal Dominant Compelling Helioophthalmic Outburst Syndrome, known by the acronym ACHOO. (Not making this up. Really.)

Bright Lights and Sneezing

Ophthalmologists conducting eye examinations long have known about the sneeze reflex because it occurs so often under bright light used for viewing the eye’s interior structures.

Because the condition is considered mostly harmless and certainly not life threatening (unless you happen to be landing a plane), there aren’t many scientific studies regarding photic sneeze reflex.

However, the U.S. military has studied the condition in relation to how it might affect fighter pilots.

More About Light-Stimulated Sneeze Reflex:

The common photic sneeze reflex, which often creates multiple sneezes, is considered an inherited condition found more often in Caucasians.

A study reported by the British Journal of Ophthalmology noted that one form of the sneeze reflex appears related to another condition (nephropathic cystinosis) that causes abnormal crystal deposits on the clear front covering of the eye ( cornea). Nephropathic cystinosis, an inherited disease found mostly in Caucasians, is a metabolic condition affecting various parts of the body.

Injections to numb the eye for eye surgeries or procedures also have been associated with a sneeze response, although at least one study notes the condition does not appear the same as the more common photic sneeze reflex.

Speculation continues that more in-depth studies of photic sneeze reflex might enhance understanding of a central nervous system disorder (epilepsy), triggered by stimulus such as strobe lights.

Other Answers:
what r u talkin about

I don't know, but it happens to me everytime I walk outside during the day

Autosomal Dominant Compelling Helioophthalmic Outburst Syndrome, known by the acronym ACHOO

"Photic sneeze reflex"

Sneezation. dk.

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what is the name of phenomenon that cause sneeze in bright sunlight?

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