Scientists at the University of Oregon, who study biological clocks, examined the survival of flies held in darkness and then gradually transferred at an older age to an environment of permanent blue light from LEDs. The study showed the effect of blue on the normal work of mitochondrium cells.
Biologists have done research on drosophiles, and these flies are a good object of experiments because of the similarities between most cellular and developmental mechanisms and other animals and humans, and scientists have observed the effects of blue light on flies that have reached different ages: two, 20, 40 and 60 days.
The study showed that the effects of radiation increased with age; blue light of the same intensity and duration reduced survival and increased neurodegeneration in old flies more significantly than in young flies; these differences, according to researchers, are caused by mitochondrial respiratory disorders.
Mitochondria is a cell power plant, which produces adenosinthosphate, a source of chemical energy, and a study shows that chronic exposure to blue light can disrupt energy production even in cells that do not specialize in the perception of light.
There is growing concern that the long-term effects of artificial light, especially blue LED light, may be harmful to human health. Although the full effects of blue light throughout life are not yet known, the accelerated ageing observed in short-lived model organisms should alert us to the potential damage to cells by this stressor.
Scientists say that there are a few things people can do to help themselves without giving up their normal lives. For example, amber lens glasses will filter out the blue light and protect the retina, and phones, laptops, and other devices can be adjusted to block the blue radiation.