Clinical Report: Outdoor artificial nighttime light may raise childhood myopia risk
Overview
Greater exposure to outdoor artificial light at night (ALAN) is associated with an increased risk of developing myopia in children, according to a study involving 19,114 children.
Background
Myopia is a growing public health concern, with its prevalence projected to reach 52% globally by 2050. Understanding environmental factors, such as outdoor artificial light exposure, is crucial.
Data Highlights
| Exposure Level (nW/cm²/sr) | Risk of Incident Myopia |
|---|---|
| 34 | 26% higher risk |
| Highest quartile | 34% higher risk |
| Lowest quartile | Reference group |
Key Findings
- 55% of participants in the prospective cohort developed myopia during follow-up.
- Each 34 nW/cm²/sr increase in outdoor ALAN exposure was associated with a 26% higher risk of developing myopia.
- Children in the highest exposure quartile had a 34% higher risk of incident myopia compared to those in the lowest quartile.
- Age modified the association; older children showed a 27% higher risk of incident myopia with greater ALAN exposure.
- Cross-sectional data indicated a smaller association with prevalent myopia, with 27% of participants having myopia at baseline.
- Subgroup analyses suggested increased risks among children with two parents with myopia and those from lower-income families.
Clinical Implications
Healthcare professionals should consider environmental factors, such as outdoor artificial light exposure, when assessing myopia risk in children.
Conclusion
The study highlights a significant association between outdoor ALAN exposure and the risk of developing myopia in children.
Related Resources & Content
- Li Y, et al., Environmental Research, 2026 -- Outdoor artificial light at night exposure and risk of myopia: A cross-sectional and prospective cohort study among Hong Kong children
- Eye, 2026 -- Factors affecting outdoor time and screentime in the context of preschool myopia prevention: a mixed-methods study
- Ophthalmology Management, 2000 -- Myopia
- contact lens spectrum, 2023 -- MASTERING MYOPIA
- COPH Consensus Guidelines on Childhood Myopia (Final) 2026 0519
- Ophthalmology Management — Digital Screen Time Increases Risk for Myopia
- Environmental Research on ALAN and Myopia
- COPH Consensus Guidelines on Childhood Myopia
- Effect of Time Spent Outdoors at School on the Development of Myopia Among Children in China: A Randomized Clinical Trial | Ophthalmology | JAMA | JAMA Network
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