Myth check
Will glasses make my child's eyes worse?
It is the worry we hear most after a first prescription, and it usually starts with something real: the number often goes up after the first pair. Here is what the evidence says is actually happening.
Buddy's quick answer
No. The American Academy of Ophthalmology says wearing glasses, even all day, will not weaken a child's eyes or make them physically dependent on glasses. A nearsighted child's prescription usually rises through childhood because the eye is still growing, and leaving glasses off does not stop that. In a two-year randomised trial, children given deliberately weaker glasses progressed faster, not slower. Wear the prescription as written, and ask the eye doctor about myopia control if the number keeps climbing.
Where the myth comes from
Why it looks like glasses made things worse
Most nearsighted children get their first glasses in the school years, which is when the eye is growing fastest. So the prescription rises after the first pair, then the second, then the third. The glasses did not cause that rise. They arrived at the start of it.
A 2012 meta-analysis found that children around age 9 became more nearsighted by about 0.55 dioptres a year in mostly European groups and 0.82 dioptres a year in Asian groups, and that the pace slowed as they got older. In the NEI-funded COMET study, nearsightedness stopped changing at an average age of about 15ยฝ, with a wide spread either side, so some children settle in their early teens and some keep changing into their twenties.
What the evidence says
Glasses on, glasses off, or glasses made weaker
| What actually happens | Source | |
|---|---|---|
| Wearing glasses all day | Will not weaken the eyes or make them physically dependent on glasses | AAO, AAPOS |
| Leaving them off | A child will not develop more refractive error because of it, but schoolwork can suffer | AAO |
| Deliberately weaker glasses | Not a brake. Under-corrected children progressed โ1.00 D in two years, against โ0.77 D with full correction | Chung et al., Vision Research, 2002 |
That trial followed 94 nearsighted children aged 9 to 14. Half wore lenses about 0.75 dioptres weaker than their full prescription, the kind of "don't make them too strong" approach some parents still ask for. After 24 months the weaker-lens group had become more nearsighted than the fully corrected group. A 2020 review of the under-correction studies called the overall evidence mixed. None of it supports weaker glasses as a way to slow nearsightedness.
When skipping glasses does harm
The cases where going without is the real risk
Unequal prescriptions
When one eye needs a much stronger lens than the other (anisometropia), AAPOS says it can lead to amblyopia. The brain starts relying on the clearer eye and stops developing the blurrier one.
A young child who needs glasses early
AAPOS describes refractive amblyopia as what happens when a child needs glasses but does not wear them early in life. Glasses help many of these children, often alongside patching or drops. See our lazy eye guide.
Eyes that turn in
Some children's eyes cross because they are working hard to focus through farsightedness. For them, glasses are part of the treatment, not an optional extra. Our farsightedness guide explains why.
Farsighted children
Why a farsighted child's number may go down
Most babies start out somewhat farsighted, and the eye usually grows towards normal focus over the early years. Doctors call this emmetropisation. A study of infants given partial glasses for farsightedness found the glasses did not stop that natural decrease. So a farsighted child's number dropping at a check-up is normal growth, not proof the glasses fixed anything. A nearsighted child's number rising is normal growth too, not proof the glasses broke anything.
If the number keeps climbing
What can actually slow nearsightedness
Ordinary single-vision glasses correct blur. They are not designed to slow progression, and ours are not either. These are the options with trial evidence behind them, and each one is your eye doctor's call.
| US status | Worth knowing | |
|---|---|---|
| MiSight 1 day contact lenses | FDA approved, November 2019, for ages 8โ12 at the start | Approval rests on the manufacturer's own trial |
| Essilor Stellest spectacle lenses | FDA authorized (De Novo), September 2025, for ages 6โ12 at the start | FDA reported 71% less progression over 24 months in a manufacturer-sponsored trial. More in our Stellest explainer |
| Low-dose atropine eye drops | No FDA-approved product; prescribed off-label, usually from a compounding pharmacy | Approved products exist in the EU and UK |
| Time outdoors | Free | Linked to fewer children becoming nearsighted; less clear that it slows myopia that has already started |
Parent questions
The things parents actually ask
Will my child become dependent on glasses?
Not physically. The American Academy of Ophthalmology says wearing glasses all the time will not weaken the eyes or make them more dependent. Children reach for their glasses because they see better with them, which is the glasses doing their job.
Why did my child's prescription go up after the first pair?
Because the eye is still growing. Nearsighted children around age 9 typically change by about 0.55 to 0.82 dioptres a year, and the pace slows with age. The first pair simply arrived at the start of that change.
Should we buy weaker glasses so the eyes do not get lazy?
No. In a two-year randomised trial of 94 children, those given glasses about 0.75 dioptres too weak became more nearsighted than children given their full prescription. Under-correction is not a way to slow myopia.
Can my child's eyes improve if they stop wearing glasses?
Going without glasses does not improve the eyes. Nearsightedness does not reverse with growth. Farsightedness often lessens as a child grows, but that happens whether or not glasses are worn, and for some children skipping glasses risks a lazy eye.
Does my child have to wear glasses all the time?
It depends on what the prescription is for. Some children need them full time, especially if they are being treated for a lazy eye or crossed eyes, and others mainly need them for distance. Ask the eye doctor whether the prescription is for constant wear.
Is there anything that slows nearsightedness?
Yes. In the US, MiSight contact lenses are FDA approved and Stellest spectacle lenses are FDA authorized for children, and low-dose atropine drops are prescribed off-label. Your child's eye doctor decides whether any of these fit.
Keep exploring
Helpful next reads
If the prescription keeps rising, start with why a child's eyesight gets worse and our Stellest explainer. For a farsighted child, read the prescription nobody warned you about. New glasses feeling strange? See getting used to a new prescription, and if they keep coming off, how to get a toddler to keep glasses on. Ordering? Measure PD at home.
Where this comes from
Sources
AAO โ Does vision worsen from wearing glasses all the time? ยท AAO โ Does not wearing glasses worsen vision? ยท AAPOS โ Glasses for children ยท AAPOS โ Amblyopia ยท Donovan et al., myopia progression rates meta-analysis, Optom Vis Sci 2012 ยท COMET Study Group, myopia stabilisation, IOVS 2013 ยท Summary of Chung, Mohidin & O'Leary, Vision Research 2002 ยท Logan & Wolffsohn, under-correction review, Clin Exp Optom 2020 ยท Atkinson et al., emmetropisation with spectacle correction, IOVS 2000 ยท FDA โ MiSight 1 day approval ยท FDA โ Stellest authorization ยท Optometry Times โ low-dose atropine FDA status
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