Blue light is part of the visible light spectrum. It comes from the sun and also exists in artificial light exposed by television, cell phone and other mobile devices. Some types of blue light are beneficial for human body, regulating our biological clocks. However, too much blue light, especially from screen devices such as retina screen, is harmful for our eyes. Blue light may also trigger macular degeneration—an age-related eye disease. Therefore, it has been extremely significant for frequent users of digital devices to protect themselves against blue light on a regular basis.
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Sources of blue light include the sun, digital screens
(TVs, computers, laptops, smart phones and tablets), electronic devices, and
LED lighting & fluorescent. Most of us spend the majority of our waking
hours staring at a digital screen. Studies suggest that 60% of people spend
more than 6 hours a day in front of a digital device.
