Ambient air pollution and glaucoma among middle-aged and older adults in China: Evidence from the China health and retirement longitudinal study.

Long-term exposure to PM 10, PM 2.5, O 3, and NO 2 is significantly associated with increased glaucoma risk among middle-aged and older adults in China.

• Why it matters: Glaucoma is a major cause of irreversible blindness, and understanding environmental risk factors like air pollution can help improve prevention strategies.
• What they did: The study analyzed data from 33,147 participants in the China Health and Retirement Longitudinal Study over four waves, linking annual average concentrations of six pollutants to residential locations.
• The result: Higher concentrations of PM 10, PM 2.5, O 3, and NO 2 in specific quartiles were associated with increased glaucoma prevalence, with potential threshold effects identified through dose-response analysis.