New glasses help your child see clearly. Then, at the next eye visit, they need stronger lenses again. Why does this keep happening? Can you do more than buy another pair?
If your child has myopia, or nearsightedness, eye growth can make things far away look more blurry. That may mean they need a stronger prescription. But a change in the numbers does not tell the whole story. An eye exam can help explain the cause.
Growing children, changing eyes
The retina is the layer at the back of the eye that senses light. To see clearly, light must focus on it. With myopia, light focuses in front of it instead. Often, the eye has grown too long from front to back. The shape of the eye’s clear front surface or lens can play a role, too.
Myopia often starts in childhood and may get worse as children grow. It can run in families. A changing prescription is not a reason to blame yourself or your child. National Eye Institute: Nearsightedness
Are the glasses making things worse?
Glasses help bring the image into focus. Needing a stronger pair does not mean the old glasses made your child’s eyes depend on them.
Have your child wear the glasses their eye doctor recommends. Weaker glasses are not a proven way to slow myopia and may make it worse. Do not change the plan or have your child go without glasses on your own. International Myopia Institute: Clinical Management Guidelines (2019)
Can we do more than update the prescription?
No treatment can guarantee that a child's prescription will stop changing. Doctor-directed myopia control may help slow myopia progression in appropriate children.
Ask your eye doctor about myopia control. This means care that may help slow how quickly myopia gets worse. Helping your child see clearly today is one goal. Helping slow further change is another.
Lens-based options include special glasses or contact lenses for myopia control. One contact-lens option is Ortho-K, short for orthokeratology. Research supports several types of care, but children respond in different ways. A child may still need prescription changes during treatment. International Myopia Institute: Myopia-Control Interventions
Where sleepSEE fits
sleepSEE is a doctor-directed myopia control program with overnight Ortho-K lenses at its core. It starts with an eye exam to find out whether this care is right for your child. Learn how sleepSEE works for children.
Ortho-K lenses are fitted to your child’s eyes and worn during sleep. They change the shape of the eye’s front surface for a short time. For children who are a good fit, this can mean clearer daytime vision. Ortho-K can also help slow myopia’s progress. It does not shorten the eye or cure myopia.
Contact lenses have risks, including eye infection. Your child must follow the lens-care steps and return for eye checks. The doctor will explain these steps and help you decide whether your child is ready. International Myopia Institute: Clinical Management Guidelines (2019)
Why measure eye length if my child can see clearly?
Seeing clearly does not tell the whole story. Ortho-K can help your child see clearly, but their eyes may still grow. The doctor measures eye length over time to help check for changes.
Eye-length checks are part of the sleepSEE children’s program. Ask your provider: “How is my child seeing—and how is each eye growing?”
Want more detail? How we measure eye growth
How is eye length measured?
Eye length, also called axial length, is the distance from the front of the eye to the retina at the back. An optical measuring device uses light to check this distance without touching the eye. The doctor compares repeat measurements over time. These checks add information to the eye exam; they do not replace it. International Myopia Institute: Instrumentation for Myopia Management (2025)
What does a change in millimeters mean?
The meaning depends on your child’s age, past measurements, and the time between visits. One number cannot tell you whether treatment is working.
For context, the 2019 IMI guidelines describe about 0.1 millimeter per year as associated with normal eye growth, and 0.2–0.3 millimeter per year as associated with increasing myopia. The report also says there is no single cutoff that defines normal or fast growth for every child. Younger children’s eyes tend to grow faster. These figures are broad research guideposts, not a personal target or a promised sleepSEE result. International Myopia Institute: Clinical Management Guidelines (2019)
Ask your provider to explain the trend for each eye, how it compares with growth expected at your child’s age, and whether the care plan needs to change. Age-based growth charts can help with that discussion. International Myopia Institute: Instrumentation for Myopia Management (2025)
What can we do at home?
Make time for your child to play outdoors, with sun protection. Outdoor time can help delay the start of myopia. There is less clear evidence that it slows myopia once a child already has it. Keep outdoor time part of your routine, along with the care your eye doctor advises. International Myopia Institute: Light and Myopia
During reading or screen time, encourage regular breaks to look into the distance. To ease eye strain, the American Optometric Association suggests looking 20 feet away for 20 seconds every 20 minutes. These breaks do not replace myopia control care. American Optometric Association: Computer Vision Syndrome
Three questions for the next eye visit
Bring past prescriptions if you have them, and ask:
- Is my child’s myopia getting worse? How much has changed?
- Should we measure eye length to track changes?
- Which myopia control options fit my child? How will we know if they help?
These questions can help you and the doctor make a plan. Past prescriptions and eye-length checks, when available, can help show changes over time. International Myopia Institute: Clinical Management Guidelines (2019)
See If My Child May Be a Candidate
This short online check is a starting point. An eye exam is needed to find out whether treatment is right for your child.
Free Download: Myopia Risk Checklist for Parents
Is your child's vision at risk? Get the 10-point checklist used by ortho-k specialists.
- 10 warning signs myopia is progressing
- Questions to ask your eye doctor
- How to evaluate ortho-k candidacy
- What to expect in the first 30 days
Myopia Risk Checklist
For Parents — Free PDF Guide
sleepSEE Editorial Team
Parent education from sleepSEE. Our guides explain myopia control and questions to discuss with your child’s eye doctor.
Medical Disclaimer
This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified eye care professional for diagnosis and treatment of eye conditions. The information provided here should not be used as a substitute for professional medical advice.
