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 ...

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.

The issue with screens is proximity and duration. Phones and laptops sit inches from your face for hours at a time.

Cowritten by Charlie Huntington and Tchiki Davis. Blue light is light of a certain wavelength that can be emitted or reflected by a variety of materials and surfaces (Okuno et al., 2002). By its ...

To be more energy efficient, many people have replaced their incandescent lights with light-emitting diode (LED) bulbs. However, those currently on the market emit a lot of blue light, which has been ...