Eyes, blinking, and screen habits

Guides and tools from the team behind Slow Blink — grounded in published eye-care guidance, written by people who stare at screens too much themselves.

The short version

Why do you blink less at a screen? Blinking is mostly involuntary, but it's suppressed by concentration. Lock onto something — code, a spreadsheet, a game — and the reflex quietly backs off. The average person blinks around 20 times a minute; in front of a screen that commonly falls below five. Nobody notices it happening, which is the whole problem.

Why does that matter? Each blink resurfaces the tear film that keeps your cornea smooth and comfortable. Blink less and that film thins and evaporates between blinks instead of being renewed. That's the gritty, tired, slightly-burning feeling that shows up around 4 PM and that you blame on sleep.

What actually helps? Two things, and neither is complicated: blink more deliberately, and give your eyes regular distance breaks — the 20-20-20 habit. The hard part was never knowing this. It's remembering it while you're absorbed in something, which is exactly when you're least likely to remember anything.

Where to start

If you're here because your eyes hurt by evening, this is the order we'd suggest — measure first, so you're solving your actual problem rather than a generic one.

1. Measure your blink rate — 30 seconds in your browser, nothing installed. Most people are surprised by how low theirs is during focused work.
2. See what that does to your eyes — an interactive tear-film simulator you can drag, rather than another wall of text.
3. Build the break habit — what the 20-20-20 rule actually is, and the honest reason most people abandon it.
4. Pick a tool if you need one — 14 Mac apps compared, including the seven others that detect blinks through the webcam the way ours does.

Guides and tools

Latest posts

Newest first, alongside the evergreen tools above. Expect app comparisons, honest reads of the published research, interactive experiments, and what our own blink stats teach us about screen habits.