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.

If you're eyeing a low-blue-light PC monitor for late-night gaming sessions, you might want to wait for Lenovo's NaturaSynth concept, unveiled this week at IFA. I’m a managing editor at PCMag.com ...

Your tablet, smartphone, laptop, and flat screen TV all have one thing in common: They each give off blue light. You may know them by the acronym ROY G BIV. Together, they make the white light you see ...