20-20-20 eye rule

Also known as: 20-20-20 rule, screen break, visual rest

Confidence

research strength

Confidence pending0 studies referenced

Strongest in Study quality (46). Held back by Sample size (10).

Study quality (37%)

Study design (21%)

Risk of bias (16%)

Mostly observational or smaller trials.

Replication (26%)

Cross-study replication (21%)

Precision (5%)

Some independent replication, statistical precision uneven.

Sample size (16%)

Small combined sample; treat as preliminary.

Consistency (11%)

Mixed direction across studies.

Recency (10%)

Mostly pre-2020 research; updates may be needed.

Effect by outcome

how big the change is

No per-outcome numbers yet for this one. Each finding's direction and strength is shown in the research below.

Every 20 minutes of near work, look at something at least 20 feet (6 meters) away for 20 seconds. Relaxes the ciliary muscle that strains during sustained focus and is the most commonly recommended intervention for digital eye strain.

This entry is in our database, but the research pipeline has not yet synthesized supporting papers. Evidence will update automatically as it's ingested.

Duration

20 seconds per break · Every 20 minutes of screen time

Editorial recommendation

Frequency

Every 20 minutes of screen time

Equipment

Timer or break app (optional)

How to do it

1Set a timer or use a screen-break app every 20 minutes
2When it triggers, lift your gaze from the screen

3Focus on something at least 6 meters away (look out a window, across the room)
4Hold the distant focus for 20 full seconds
5Resume work

Safety notes

Very safe. No downside.

What the research shows

↑

In a 2-week study of 29 symptomatic computer users with automated reminders, following the 20-20-20 rule significantly reduced digital eye strain and dry eye symptoms (p<=0.045), although objective signs were unchanged and the benefit was not maintained one week after stopping.

moderate evidence1 study:Contact lens & anterior eye : the journal of the British Contact Lens Association (2023)

Protocols featuring this habit

Myopia Progression SlowdownCLimited confidence

Digital Wellbeing ProtocolBBuilding confidence

Dry Eye Relief ProtocolCLimited confidence

Screen Eye Strain ReliefCLimited confidence

Questions about 20-20-20 eye rule

How was 20-20-20 eye rule actually done in the studies?

How long and how often did studies test 20-20-20 eye rule?

Are there safety considerations for 20-20-20 eye rule?

Health domains

Vision & eye health

ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.