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.

Interactive

Why screens dry your eyes

Drag a slider, watch a tear film thin: what 7 blinks a minute does to an eye built for 22.

Tool

The 30-second blink test

Measure your real blink rate with your webcam — entirely in your browser, nothing uploaded.

Guide

The 20-20-20 rule, explained

What the AOA-recommended break habit is, why screens make you blink less, and how to actually stick to it.

Comparison

Best eye-break apps for Mac (2026)

Slow Blink vs LookAway vs Blink Eye — timers vs real blink detection, honestly compared.

From the dev log

First up: an interactive simulator of what screen work does to your blink rate. More notes from building a cat that reminds you to blink — experiments, blink-detection engineering, our own blink stats — are on the way.

Meet the cat

Blink detection, 20-20-20 breaks, and on-device stats. Free for macOS.

Download Slow Blink