“The photic sneeze reflex is a reflex condition that causes sneezing in response to numerous stimuli, such as looking at bright lights or periocular (surrounding the eyeball) injection. The condition affects 18–35% of the world's population”
Its cause, and the tendency for inheritance within families, are unknown.
Also known as 'Autosomal Compelling Helio-Ophthalmic Outburst' (ACHOO) syndrome (Source :Medical Genetics Summaries)
Also see :
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