Short-sightedness used to run quietly in families and was treated as a minor inconvenience. That has changed. Myopia is now far more common in each successive generation, and for the small subset of children who progress to high myopia, it raises the lifetime risk of serious eye disease. The good news is that paediatric eye care has changed too — there are now four distinct treatments with real evidence behind them, and the single biggest preventive lever is something most parents already control: time outdoors. For more on children's health, visit Healthbooq.
The Myopia Epidemic
In urban East Asia, 80 to 90% of young adults are now myopic. Europe and North America are not far behind on the trajectory. Current UK estimates put 20 to 35% of school-age children in the myopic range, up from roughly 10 to 15% in their parents' generation. The International Myopia Institute (IMI) and WHO project that around half of the world's population could be myopic by 2050.
Genetics has not changed in 30 years; environment has. The most-studied driver is outdoor light. Work by Ian Morgan (Australian National University) and Kathryn Rose (UTS Sydney) showed that children who spend more time outdoors have markedly lower rates of myopia onset. The mechanism: bright outdoor light stimulates retinal dopamine release, which inhibits the axial elongation of the eye that underlies myopia. Outdoor light is roughly 10,000 to 100,000 lux. Indoor lighting is 200 to 500 lux. The gap is enormous.
Near work — reading, screens, close craft — is associated with myopia, but the effect is weaker than the outdoor signal and partly confounded by the fact that high-near-work kids spend less time outside.
Who Gets Myopia
Family history matters. Two myopic parents push a child's risk to roughly 40 to 60%, against 10 to 20% with no myopic parents. But genes explain only part of the picture, and rates are climbing in children with no family history at all.
Onset is usually between 6 and 14 years, with the steepest progression in early-to-mid primary school. Myopia tends to keep progressing through the teenage years and stabilises in the early 20s. Earlier onset means more years of progression — a child who starts at 7 has more runway to high myopia than one who starts at 12. Younger onset is the single strongest red flag.
Why High Myopia Matters
Mild myopia (under -3 dioptres) is well managed by glasses or contact lenses and carries little long-term risk. High myopia (-6 dioptres or worse) is a different category. The eyeball has elongated substantially, the retina is stretched thin, and mechanical stress on the back of the eye raises the risk of:
- Retinal detachment — about 8 to 10 times higher than in non-myopes.
- Myopic maculopathy — thinning and damage at the macula, which can cause progressive central vision loss.
- Open-angle glaucoma — about 2 to 3 times higher.
- Earlier cataracts.
These risks sit at the high-myopia end. The point of myopia control is to keep your child from getting there.
Myopia Control Treatments
Glasses or contacts still correct the vision your child has today. Myopia control sits alongside that — it slows how fast the prescription grows. Four approaches have evidence (AAO, AAPOS, and IMI all recognise these):
Low-dose atropine eye drops (0.01 to 0.05%, nightly). The strongest evidence base. The ATOM studies in Singapore and the LAMP trial (Hong Kong) showed slower axial elongation with minimal side effects at these concentrations — pupil dilation and near-vision changes are negligible compared with full-strength atropine. Higher concentrations work harder but rebound more when stopped. Available in the UK through specialist optometrists and ophthalmologists; not routinely funded on the NHS.
Orthokeratology (ortho-k). Rigid contact lenses worn overnight that gently reshape the cornea, giving clear daytime vision without glasses. Multiple trials show roughly 40 to 60% reduction in axial elongation versus standard glasses. Mechanism: peripheral defocus. Requires careful fitting and regular review; hygiene matters because of the small infection risk inherent to overnight contact lens wear.
Dual-focus or peripheral-defocus contact lenses. MiSight (CooperVision) was the first contact lens approved specifically for myopia control and has shown roughly 50% reduction in axial growth versus standard contacts in multi-year trials. Daily disposable, suitable for many primary-school-age children who can manage lens hygiene with a parent's help.
Peripheral-defocus spectacle lenses. MiYOSMART (Hoya) and Stellest (Essilor) use a central distance zone surrounded by tiny defocus segments to reduce the peripheral hyperopic defocus that appears to drive elongation. Trial data shows roughly 50 to 60% reduction in progression. The simplest option for children not ready for contact lenses.
Outdoor time. The cheapest and most evidence-backed prevention. Aim for at least 1.5 to 2 hours of outdoor light per day, more if you can. Effect is strongest before myopia onset; once myopia has started, outdoor time is still recommended but less reliably slows progression on its own.
Practical Steps for Parents
Take any new squinting, sitting closer to the TV, or "I can't see the board" complaint seriously and book a sight test. NHS sight tests are free for children under 16, and glasses are NHS-funded where needed.
If your child has been diagnosed with myopia, ask for a myopia-management consultation, especially if the child is:
- Under 10 at onset.
- Progressing more than -1 dioptre per year.
- Has a family history of high myopia.
Not every optometrist offers myopia control. Look for a practice that specialises in it — the College of Optometrists in the UK runs a finder. In the US, AAPOS and AAO list practitioners.
Outside the clinic, the lever you already control is outdoor time. A 15-minute scooter to school each way, recess outside, and weekend time in daylight add up to most of the daily target without anyone calling it an intervention.
Key Takeaways
Childhood myopia is rising fast — roughly 30% of UK school-age children today, projected toward 50% globally by 2050 (WHO/IMI). The driver is mostly environmental: less outdoor light, more near work. Most myopia is correctable with glasses, but high myopia (over -6 dioptres) carries lifelong risks of retinal detachment, glaucoma, and myopic maculopathy. Modern myopia control — daily 1.5 to 2 hours outdoors, low-dose atropine (0.01 to 0.05%), orthokeratology, and dual-focus contact lenses or peripheral-defocus glasses — can slow progression by roughly 30 to 60% and keep more children out of the high-myopia range.
