In some places around the globe, the lights never go off. Streetlights, roadway lighting, and illuminated signs can deter crime, make roads safer, and enhance landscaping. Undisrupted light, however, comes with ecological, behavioral, and health consequences.
FrontiersSep 6 2024
We show that in the US there is a positive association between AD prevalence and exposure to light at night, particularly in those under the age of 65. Nightly light pollution – a modifiable environmental factor – may be an important risk factor for AD." High intensity, high risk The researchers studied light pollution maps of the lower 48 US states and incorporated medical data about variables known or believed to be risk factors for AD in their analysis.
For people aged under 65, however, the researchers found that higher nighttime light intensity was associated with a greater AD prevalence than any other risk factor examined in the study. This could suggest that younger people may be particularly sensitive to the effects of light exposure at night, the researchers said.
Curtains and masks The researchers hope that their findings can help educate people about the potential risks of light at night. "Awareness of the association should empower people – particularly those with risk factors for AD – to make easy lifestyle changes," said Voigt-Zuwala. "Easy to implement changes include using blackout curtains or sleeping with eye masks. This is useful especially for those living in areas with high light pollution.
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