![]() ![]() The number of smartphone users in the US has nearly tripled since 2010, from 62.6 million to 163.9, and is projected to reach 220 million by 2018. ![]() So everybody's talking about the dangers of blue light - how much exposure are we getting daily, and how does it affect our lives? There was a time in the not-very-distant past when only the techies were staring at computer screens for hours at a time.
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