Autosomal Dominant Compelling Helioopthalmic Outburst (ACHOO) Syndrome is characterized by uncontrollable sneezing in response to the sudden exposure to bright light, typically intense sunlight.
That’s from a medical genetics summary of the syndrome. ACHOO syndrome affects up to a third of the world’s population. The Wikipedia page is here. The syndrome even has its own ICD-10 billing code, R06.7.
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