Why Looking At Light Makes Us Sneeze

In 1991, a University of Manchester pathologist named Emyr Benbow wrote a letter to the editor of the British Journal of Ophthalmology. “Even trivial symptoms are more easily tolerated if you can put a name to them,” he wrote, “even if that produces only an illusory understanding of their significance”. The name he was referring to was “photic sneezing”. Benbow suffered from a curious phenomenon where moving from darkness into very bright light, caused him to reflexively sneeze. He found it of some comfort that “it occurs in normal people”.

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