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LA Times Studios may earn commission from purchases made through our links. This guide explores how blue light glasses can help with eye strain and sleep issues caused by digital screens. Wake up.

Many people use their electronic devices, including phones, tablets, and computers, for extended periods. Companies now sell screen protectors that reportedly block blue light and benefit eye health.

We’re staring at our devices more than ever, and besides eating up our time, they’re giving off tons of light. Blue light has gotten an especially bad rap, but that’s not quite fair: It’s just one ...