Technically ereader screens are frontlit: the glass in front of the e-ink display refracts light across the display evenly. So instead of looking right at a lig

Technically ereader screens are frontlit: the glass in front of the e-ink display refracts light across the display evenly. So instead of looking right at a light source, you're viewing refracted light scattered across the entire display. I also get a headache from backlit screens. Frontlit e-ink is much better.