I myself can read ebooks without interruption for just as long as I can paper ones. Let us know your own experiences with the tips below.
1. Keep in mind your environment. Eyestrain may be less of a problem if you’re reading in a bright room. Position your phone, tablet, or dedicated ereader to avoid glare from the lighting.
2. Consider the use of a frontlit E Ink reader, like the most Kindle models or the Kobos, so the light from the screen isn’t glaring directly at you. Instead, the rays from the front lights bounce off the screen just as they would off paper. Yes, this is old stuff for TeleRead regulars. But it might not be for your friends who badmouth ebooks without familiarity with all the options. Educate ’em!
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4. Experiment with boldface. It won’t just make text more readable for many people on E Ink machines, it will also allow you to crank down the backlighting or front lighting. Along the way, you’ll save battery life. Recent Kindles offer a boldface font, and Kobos even let you vary the extent of bold on different phones. iPhones and iPads provide for bold within certain apps by way of the San Francisco font. On Android phones, you can select bold within the Kindle app.
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9. Keep in mind the bottom line. It’s not to make your ebooks look like paper. It’s to be as comfortable as possible while getting the most out of them in every respect. So don’t be shy about weird screen colors.
Link to the rest at TeleRead
PG uses plugins or settings to filter blue light on his phone and tablet when reading on those devices at night so as not to encourage his body to think it’s the middle of the day. The OP has suggestions on how to do that.
However, for reading long-form text, either in the middle of the day or at night, PG is still a giant fan of his Kindle Paperwhite. It’s small and lightweight (205 grams for the Paperwhite vs. 469 grams – just over a pound – for the ten inch iPad Pro), so it’s easy to hold for long periods of time. 205 grams is less than most paperbacks weigh. Plus, unlike a paperback, if you drop the Paperwhite, you don’t lose your place.
PG keeps the light level on the Paperwhite low, especially when reading in the dark, while maintaining excellent readability, so as not to disturb Mrs. PG’s sleep.