The 20-20-20 rule explained
When we look at digital screens, we blink considerably less often — as few as half as many times as normal. Blinking spreads tears across the eye surface, and without it the eyes dry out. Combined with the effort of maintaining focus at near distance, this leads to the tired, burning, and blurry sensation we call digital eye strain, or computer vision syndrome.
A simple and effective habit is the 20-20-20 rule: every 20 minutes, look at something 20 feet (about 6 metres) away for at least 20 seconds. This gives the focusing muscles a break and encourages more natural blinking.
Adjust your screen so its top is roughly at eye level, keep it about an arm's length away, and reduce glare by positioning it away from bright windows. Increase text size rather than squinting, and consider a reminder to blink consciously during long sessions.
If your eyes feel dry while working, a lubricating eye drop can restore comfort. Products like Aquasight (CMC + Glycerine) and Hylusight (Sodium Hyaluronate) are gentle options suitable for regular use during screen-heavy days.
Persistent blurring, headaches, or eye pain that continues despite better habits and regular use of lubricating drops should be reviewed by an eye care professional.
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