Reader Settings That Actually Reduce Eye Strain on Long Sessions

Most people never touch the reader settings, then wonder why their eyes hurt after two hours. Typography is the single largest controllable factor in reading comfort, and every one of these controls is one click away. Here is what to change and why.

Line length is the one that matters most

The single biggest cause of reading fatigue on a wide screen is line length. When a line runs 140 characters, your eye has to hunt for the start of the next one, and you lose your place several times a page without noticing. The comfortable range is roughly 60 to 80 characters per line. On a desktop that usually means constraining the reading column rather than letting text fill the window.

Line height, second

Default line spacing is tuned for short text, not for a 3,000 word chapter. Increasing line height to around 1.6 to 1.8 gives your eye a clear horizontal track to follow. This is the change most readers notice immediately.

Font size, and why bigger is not always better

Increase font size until you can read without leaning in, then stop. Oversized text forces more line breaks and more scrolling, which is its own kind of fatigue. On a phone, comfort usually lands a little above the browser default.

Choosing a theme

Dark mode

Genuinely better in a dark room, genuinely worse in bright daylight. Pure white on pure black is harsher than most people expect; a soft off white on a dark grey is easier on the eye than maximum contrast.

Sepia

The compromise setting. Lower contrast than white, warmer than dark mode, and the most comfortable option for many readers in ordinary indoor light.

Light

Correct in daylight and near a window. Switch away from it at night.

Font family

Serif fonts carry a small readability advantage in long form prose for many readers because the strokes help distinguish letterforms. Sans serif is often cleaner on lower resolution screens. This one is genuinely personal, so try a full chapter in each rather than judging from a paragraph.

Remove the interruptions

Ambient distraction costs more attention than any typography setting. Full screen or distraction free reading removes surrounding interface. If ad breaks between chapters are what is pulling you out of the story, Premium removes them.

A starting configuration

• Theme: sepia during the day, dark after sunset.
• Line height: 1.7.
• Font size: one or two steps above default.
• Column width: constrained, not full screen.
• Font: serif for prose, then adjust to taste.

Set this once in reader customisation and it applies to every chapter you open afterwards.

Frequently asked questions

Do my reader settings sync across devices?

Yes, when you are signed in.

Does dark mode save battery?

On OLED screens, yes, noticeably. On LCD, barely.

Is there a way to reduce blue light for night reading?

The dark and sepia themes both lower blue output; combine with your operating system night mode.

Can I change settings mid chapter?

Yes, and your position is preserved.

Adjust yours: reader customisation settings.