What is the 20-20-20 rule?

Every 20 minutes, look at something about 6 metres away for 20 seconds.

Does dark mode prevent eye strain?

It may feel comfortable, but it does not replace breaks and good ergonomics.

Evidence is limited; breaks and regular blinking remain important.

EYE DISCOVER guides

Spending long hours in front of a computer, phone or tablet may cause dryness, heaviness, intermittent blurred vision or headaches.

When concentrating on a screen, we often blink less, which may encourage evaporation of the tear film.

Artificial tears may provide lubrication when dryness is associated with screen use.

Seek professional advice if you have frequent blurred vision or headaches.

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