Munich - LED displays and so-called blue light are not a danger to eyes or sleep. This is explained by the German Ophthalmological Society (DOG).
Blue light belongs to the visible part of the electromagnetic spectrum and is characterized by energy richness. "Nevertheless, the light intensity when using electronic devices is far too low to cause retinal damage to the eyes," explained DOG expert Michael Bach of the University Medical Center Freiburg.
The natural illuminance in the free one with cloudy winter sky amounts to in our latitudes approximately 5,000 lux, on a sunny day up to 100,000 lux. A computer screen, very brightly adjusted, remains at a distance of 50 centimeters, however, below 500 lux. "Even if children sit for hours in front of screens due to corona-induced distance learning, at least blue light eye damage is not to be feared as a result," the vision researcher noted.
Contact lenses that block blue light also did not protect against eye fatigue during screen work better than standard contact lenses, according to a recent study (American Journal of Ophthalmology 2021; DOI: 10.1016/j.ajo.2021.02.010), the DOG said.
Studies: No evidence of health risk from cell phone radiation Smartphones taboo for young children Death and illness cases: Samsung apologizes DOG expert gives the all-clear also in relation to possible sleep disturbances, which could cause the blue light by evening reading at electronic devices. This assumption, too, has since been refuted by a study, he says (Sleep Health 2021; DOI: 10.1016/j.sleh.2021.03.005). Bach therefore recommends simply avoiding maximum display brightness when reading on an electronic device before falling asleep.
DOG President Hagen Thieme thinks it is important to bring these research findings to the general public. "They serve to educate and protect consumers from misleading advertising and unsettling false reports that pursue purely commercial interests," said the director of the University Eye Hospital in Magdeburg.
Translated with www.DeepL.com/Translator
Article is from a reputable, highly prestigious magazine for doctors in Germany. Full study here: https://pubmed.ncbi.nlm.nih.gov/33587901/