Blue light from devices used at night makes it harder to fall asleep.
Sleep disruption in children is linked to behavior problems, depression and reduced performance in school.
Sleep disruption in adults is associated with multiple health problems, including high blood pressure and cardiovascular disease. (credit: Short- and long-term health consequences of sleep disruption. G Medic, et al. Nature and Science of Sleep. 2017; 9: 151–161. )
Children are especially at risk. They are exposed to blue light earlier than ever before. The immature lens of a child’s eye doesn’t block blue light as effectively as adult lens. A child’s retina is exposed to 10x more blue light than that of an adult. (credit: Light-emitting diodes (LED) for domestic lighting: Any risks for the eye? Progress in Retinal and Eye Research. F Behar-Cohen, et al. 2011; 30: 239-257.)