The 20-20-20 rule on Mac
What the 20-20-20 rule is, why it helps with screen fatigue, and how to follow it on a Mac without breaking your focus.
Outline. This guide is a structured draft. Each section lists what it will cover; the full text is still to be written, and health claims need sources before publishing.
What the rule says
- Every 20 minutes, look at something about 20 feet (six metres) away for 20 seconds.
- Where it comes from. [SOURCE — cite an optometry or ophthalmology reference]
Why screens tire your eyes
- Focusing close up for long stretches, blinking less while reading.
- What the research does and does not show. [SOURCE]
Following it on a Mac
- Built-in options: Screen Time downtime, Focus modes, a plain timer. What each lacks.
- What a good reminder should do: warn before interrupting, wait for a pause in typing, stay quiet during calls.
Doing it with Toolnotch
- Gentle, Moderate and Strict modes, and when to pick each.
- Automatic pauses during meetings, video and screen recording.
- Streaks that forgive one slip.
Beyond the eyes
- Longer breaks every 90 minutes: stand up, neck rolls, water.
- Blink and posture nudges.