By Dr. Mercola
Before the invention and distribution of artificial lighting, the sun determined when people went to bed and when they woke up. While artificial light has extended the hours you may be productive, it comes at a price as it affects health, interrupts sleep patterns and circadian rhythms and may shorten your lifespan.
Digital devices are pervasive sources of artificial light. They emit high levels of blue light, which have a damaging effect on the photoreceptor cells located in the retina. This photosensitive tissue converts light into electrical signals that travel along the optic nerve to your brain, where the information …read more
Source: mercola
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