Depends, a backlit e-ink display is actually quite easy on the eyes. I'm middle aged and I should get reading glasses but haven't yet. Basically, the backlight

Depends, a backlit e-ink display is actually quite easy on the eyes. I'm middle aged and I should get reading glasses but haven't yet. Basically, the backlight creates enough contrast that I can easily read the text. I tend to read late at night when my eyes are tired as well. However, unlike LED screens, the contrast comes from the light reflecting on the display, so the more light, the better it gets. You can use e-ink screens comfortably in the blazing sun wearing sun glasses. Even the best LED screens struggle to deliver enough contrast under those circumstances.