What the research says, recommended limits by age, and practical strategies to protect your child's vision
Australia's children are spending more time than ever on screens — tablets, phones, laptops, and televisions. Research consistently shows a link between prolonged near work (including screen use) and the development and progression of myopia in children. This doesn't mean screens cause myopia directly, but they are a significant modifiable risk factor.
The mechanism involves the eye's focusing system. When a child stares at a screen at close distance for extended periods, the ciliary muscle in the eye remains contracted. This sustained near focus appears to signal the eye to grow longer — which is exactly what happens in myopia. Unlike adults, children's eyes are still developing and highly responsive to environmental signals.
By the time your child complains about blurred vision, the myopia may have progressed significantly. Children don't naturally complain about vision problems — they adapt. Regular eye tests (every 12 months for school-aged children) are essential whether or not you notice any issues.
Australian guidelines and research consensus provide helpful age-based benchmarks:
No screens except video calls with family. Screens should be avoided entirely at this age — brain development occurs best through physical play and face-to-face interaction.
Only high-quality educational content with a parent present. Passive entertainment should be minimal. Prioritise outdoor play and creative play.
Balance screen use with at least 2 hours of outdoor time. Prioritise educational content and avoid unstructured use. Gaming and social media should be limited.
Balance with physical activity, outdoor time, and social interaction. Encourage breaks every 30-40 minutes during extended screen use for homework or gaming.
Every 20 minutes, look at something 20 feet away for 20 seconds. This resets the focusing system and reduces eye strain.
Set a timer during homework or tablet use to remind your child to take a break.
The distance your child holds a screen makes a significant difference. Screens held too close dramatically increase focusing demand. Set up devices on a desk or table rather than in a child's lap:
• Tablets and phones: Use a stand or propped-up position to keep screens at arm's length (~40-60cm)
• Laptops: Connect to an external monitor or raise the screen to eye level with a stand
• TV: Ensure viewing distance is at least 2 metres for a 40-inch screen, 3 metres for larger screens
Never use screens in the dark — the pupils dilate wide to let in more light, increasing the focusing demand even further. Use these guidelines:
• Ensure the room is well-lit (overhead light on, not just lamp)
• Reduce screen brightness to match ambient light — slightly dimmer than comfortable is better
• Avoid screens for 1 hour before bed — blue light affects sleep quality, and reduced sleep is associated with faster myopia progression
Research from Singapore, China, and Australia consistently shows that children who spend more time outdoors have lower rates of myopia. Sunlight exposure appears to slow eye growth — the exact mechanism is still being studied, but the effect is real and significant.
The goal isn't to eliminate screens entirely — it's to ensure outdoor time is a non-negotiable part of every day, regardless of screen use:
School-age children spend significant time doing near work — reading, writing, and digital homework. The same 20-20-20 rule applies, but extended homework sessions need a structured approach:
• Break long assignments into 30-40 minute segments with 5-10 minute breaks
• Encourage breaks that involve looking OUT the window (distant focus) rather than looking at another screen
• Printed homework is better than digital when possible — lower contrast screens (paper) demand less from the focusing system
If your child is undergoing Ortho-K treatment, these habits still matter. Ortho-K controls myopia progression but doesn't eliminate the environmental risk factors. The combination of Ortho-K plus healthy screen habits is more effective than either approach alone.
Watch for these behavioural indicators that may signal excessive near work is affecting your child's eyes or vision:
• Complaining of headaches — especially after school or screen sessions
• Rubbing eyes frequently during or after reading/screens
• Closing one eye to read or watch — may indicate astigmatism or focusing imbalance
• Moving closer to screens or leaning in to read
• Losing place while reading or difficulty concentrating on close work
• Avoiding reading or homework — may indicate a vision problem making it uncomfortable
If you recognise these signs in your child — or if your child already wears glasses for myopia — book an eye examination. Medicare covers bulk-billed annual eye tests for children under 18. Mention that you're concerned about myopia progression, and ask whether Ortho-K lenses or other myopia control options might be suitable.
Early detection and intervention give your child the best chance of minimising lifelong myopia progression.
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