It's easy when you're young! Up to a certain age our eyes work automatically and quickly adjust to different distances without us even noticing. It feels perfectly natural to look up from checking emails or choosing the next song on our smartphone playlist to greeting a friend in the distance and then immediately looking down again, all with perfectly sharp and clear vision.
Do you use your smartphone on a daily basis? Take the free ZEISS Digital Eye Strain Test on your smartphone to find out how well your eyes are geared to the challenges of modern life. Eye strain and fatigue can lead to eye irritation, headaches and neck pain. Perhaps you have already experienced the sensation of tired, strained eyes after a particularly stressful day.