Screen Time and Children Vision Development: What Parents Should Know
Patrick Bushe
September 2, 2025 · 5 min read
Parents worry about screens and eyesight for good reason: nearsightedness (myopia) in children has risen sharply in recent decades in many countries. Screens are part of the picture, but the most useful thing to know is what protects children's eyes.
What the guidelines say
- World Health Organization (2019): no sedentary screen time for babies under 1; for 2 to 4 year olds, no more than 1 hour a day, and less is better.
- American Academy of Pediatrics: avoid screens other than video chatting before about 18 to 24 months; for 2 to 5 year olds, about 1 hour a day of high-quality programs, ideally watched together; for older children, consistent limits that protect sleep, activity, and family time.
Screens and nearsightedness
Myopia develops when the eye grows too long during childhood. Research links it with lots of close-up work, which includes screens but also books and homework, and with too little time outdoors. Outdoor time stands out: studies suggest that children who spend more time outside, around two hours a day in several studies, are less likely to become nearsighted. Daylight and looking into the distance both seem to help.
Practical habits
- Get them outside every day. Play, walks, and sports all count.
- Use the 20-20-20 rule for homework and screens: every 20 minutes, look far away for 20 seconds.
- Keep screens at a distance. Tablets and books held very close make the eyes work harder. Aim for at least an arm's length for screens.
- No screens in the hour before bed, and keep devices out of the bedroom.
- Make limits concrete. Device screen time settings or a family plan work better than daily negotiations.
Watch for signs and get eye exams
Squinting, sitting very close to the TV, holding devices near the face, headaches, or trouble seeing the board at school can all signal a vision problem. Regular eye exams catch myopia early, and there are treatments that can slow its progression in children, so ask an eye doctor about options.
