Study: Light-Emitting Screens Before Bedtime Disrupt Sleep
jfruh writes: Tablets and e-readers are more convenient in many ways than paper books, but many people have complained that the physical experience of using them isn't as good. And now we have some specific quantification of this fact: a study has shown that people who read text on a tablet before bed don't sleep as well as those who read a traditional book (abstract).
The amount of light entering the eye and stimulating the optic nerve is higher for the tablet. More light == more wakefulness. We're wired that way.
Related studies have found that the main reason light-emitting screens keep people from sleeping is because they don't ever fucking shut them off and the next thing they know it's 5:36 in the bloody morning!