Blue light is emitted by computer and laptop screens, by fluorescent lights, flat-screen televisions, cell phones and tablets. It is also a component of natural light that emanates from the Sun, but our exposure to it has increased drastically due to our widespread use of devices that employ LED technologies. In fact, many humans today are exposed to blue light throughout most of the waking day. Blue light (BL) waves are only marginally less energetic than UV radiation and so it is natural to wonder whether exposure to BL is dangerous for our eyes and our bodies in general.
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