Outdoor artificial nighttime light may raise childhood myopia risk

Higher exposure was associated with new-onset myopia over 3 years, with risk increasing sharply at higher nighttime light levels.

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Greater residential exposure to outdoor artificial light at night is associated with a higher risk of developing myopia among children.
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The study analyzed data from 19,114 children, with 2,558 completing a 3-year follow-up without myopia at baseline.
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Each 34 nW/cm²/sr increase in outdoor artificial light exposure correlated with a 26% higher risk of developing myopia.
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Children in the highest exposure quartile had a 34% higher risk of incident myopia compared to those in the lowest quartile.
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The study's findings should be interpreted cautiously due to limitations such as potential recall bias and lack of generalizability.

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