Researcher Tracked Photic Sneezing Episodes in 2022
A study recorded 82 sneezing incidents to measure the trigger of the photic sneeze reflex in daily life.
Updated on Oct. 2, 2026 in Allergies
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Between July 12 and August 10, 2022, a researcher monitored 82 sneezing episodes to investigate the photic sneeze reflex. The study captured how rapid increases in light exposure correlated with the reflex in a real-world setting.
Why it matters
Understanding this reflex is important as it affects an estimated 20% to 30% of the population and has been linked to safety concerns, including a 2026 traffic crash involving a delivery rider in India.
During the study, light levels rose from an average of 527 lux to 5,349 lux during sneezing events. Conversely, laboratory trials utilizing 150 bursts of light reaching up to 17,600 lux failed to trigger a single sneeze.
The players
Lucien Bickerstaff
He is the lead participant and researcher who conducted the 30-day study on photic sneeze reflex.
The details
The participant tracked episodes using a phone application while wearing a light sensor on a necklace that logged data every 30 seconds. The reflex is scientifically associated with a genetic variant located near the ZEB2 gene.
Timeline
July 12 to August 10, 2022, marked the data collection period.
October 2025 saw the initial appearance of the research paper.
March 2026 was when the peer-reviewed version of the paper was published.
April 2026 is when a case report on a traffic crash was released.
The Big Picture
This study aligns with ongoing genetic research identifying a specific variant near the ZEB2 gene as a potential driver of the reflex. It bridges the gap between theoretical genetic markers and observed physiological responses in daily environments.
Individuals who experience the photic sneeze reflex may benefit from awareness of their sensitivity to sudden shifts in light exposure. This is particularly relevant for those operating vehicles or machinery where an unexpected sneezing fit could impact safety.
The takeaway
The photic sneeze reflex is a documented physiological response often triggered by changing light conditions rather than allergens. Larger future studies will be necessary to better define the prevalence of this reflex and its potential impact on daily safety.
Further reading
Learn more about underlying causes of immune and sensory responses in our Allergies section.
Source note: This article includes information reported by Medical Daily.
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