Vaping Linked to Higher Risk of Blurred Vision & Eye Pain

TOPLINE: 
Adults who use electronic cigarettes (e-cigarettes/vapes) had more than double the risk for developing uveitis than nonusers, with elevated risks persisting for up to 4 years after initial use. This increased risk was observed across all age groups and affected both men and women as well as various ethnic groups.
METHODOLOGY: 
Researchers used the TriNetX global database, which contains data from over 100 million patients across the United States, Europe, the Middle East, and Africa, to examine the risk for developing uveitis among e-cigarette users.
419,325 e-cigarette users over the age of 18 years (mean age, 51.41 years; 48.65% women) were included, based on diagnosis codes for vaping and unspecified nicotine dependence.
The e-cigarette users were propensity score–matched to non-e-cigarette-users.
People were excluded if they had comorbid conditions that might have influenced the risk for uveitis.
The primary outcome measure was the first-time encounter diagnosis of uveitis using diagnosis codes for iridocyclitis, unspecified choroidal inflammation, posterior cyclitis, choroidal degeneration, retinal vasculitis, and pan-uveitis.
TAKEAWAY:
E-cigarette users had a significantly higher risk for developing uveitis than nonusers (hazard ratio [HR], 2.53; 95% CI, 2.33-2.76 ), for iridocyclitis (HR, 2.59), unspecified chorioretinal inflammation (HR, 2.34), and retinal vasculitis (HR, 1.95).
This increased risk for uveitis was observed across all age groups, affecting all genders and patients from Asian, Black or African American, and White ethnic backgrounds.
The risk for uveitis increased as early as within 7 days after smoking an e-cigarettes (HR, 6.35) and was present even at 4 years (HR, 2.58) after initial use.
A higher risk for uveitis was observed among individuals with a history of both e-cigarette and traditional cigarette use than among those who used traditional cigarettes only (HR, 1.39).
IN PRACTICE:
“This study has real-world implications as clinicians caring for patients with e-cigarette history should be aware of the potentially increased risk of new-onset uveitis,” the authors wrote.
SOURCE:
The study was led by Alan Y. Hsu, MD, from the Department of Ophthalmology at China Medical University Hospital in Taichung, Taiwan, and was published online on November 12, 2024, in Ophthalmology.
LIMITATIONS: 
The retrospective nature of the study limited the determination of direct causality between e-cigarette use and the risk for uveitis. The study lacked information on the duration and quantity of e-cigarette exposure, which may have impacted the findings. Moreover, researchers could not isolate the effect of secondhand exposure to vaping or traditional cigarettes. 
DISCLOSURES:
Study authors reported no relevant financial disclosures. 
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
 
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