Ortho-K for Children: Benefits & Risks

EMME Visioncare provides custom-fitted Ortho-K in Singapore at The Cathay and Jelita Mall.

If your child's myopia is becoming stronger, you may have heard about Ortho-K as an alternative to wearing glasses during the day. For parents, however, the more important question is often not simply whether Ortho-K can provide clear vision, but whether it can also help slow the progression of childhood myopia.

Orthokeratology, usually shortened to Ortho-K, uses specially designed rigid contact lenses that are worn while sleeping. The lenses temporarily reshape the front surface of the eye so that, after removing them in the morning, suitable children can see clearly during the day without glasses or daytime contact lenses.

In children with myopia, Ortho-K can provide an additional benefit: research has shown that it can slow the axial elongation of the eye associated with myopia progression. This is why Ortho-K is now used as one of several evidence-based options for childhood myopia control.

Originally published: 1 April 2023.
Last reviewed and updated: 30 September 2026.

What exactly is Ortho-K?

Ortho-K lenses are custom-designed rigid gas-permeable contact lenses made specifically for overnight wear.

Unlike conventional contact lenses, which correct vision while they are on the eye, Ortho-K lenses temporarily change the shape of the cornea while your child sleeps. The cornea is the clear front surface of the eye and is responsible for a significant part of the eye's focusing power.

After the lenses are removed in the morning, the temporary corneal change allows light to focus more appropriately on the retina, providing clearer distance vision during the day.

The effect is temporary and reversible. To maintain the vision correction, the lenses generally need to be worn regularly overnight.

You can learn more about the treatment itself on our Ortho-K and orthokeratology page.

Why do parents consider Ortho-K for children?

For a child with myopia, Ortho-K can serve two different purposes at the same time.

1. Clearer daytime vision without glasses

After an appropriate fitting and adaptation period, many suitable children can go through the school day without spectacles or daytime contact lenses.

This can be particularly convenient for children who participate in sports, swimming or other activities where glasses may be inconvenient.

2. Slowing childhood myopia progression

The second benefit is particularly important for children whose myopia is progressing.

Clinical trials have shown that children wearing Ortho-K generally experience less axial elongation than children using conventional single-vision correction. Axial elongation refers to the eye becoming longer from front to back, which is an important structural change associated with childhood myopia progression.

The International Myopia Institute's 2025 review continues to recognise overnight orthokeratology as an effective optical intervention for slowing axial elongation in children with myopia.

However, Ortho-K does not guarantee that myopia will stop progressing. The degree of response varies between children, and progression still needs to be monitored over time.

How does Ortho-K help control myopia?

Ortho-K temporarily flattens the central cornea while creating characteristic changes in the surrounding mid-peripheral cornea.

These changes alter how light is focused across different areas of the retina. This optical effect is thought to play an important role in reducing the stimulus for excessive eye growth, although the biological mechanisms involved in myopia control are still being studied.

What matters clinically is the outcome: multiple studies have found that children treated with Ortho-K tend to show less axial-length growth than comparable children using ordinary single-vision correction.

This is different from simply correcting blurred vision. A normal pair of single-vision spectacles can help a child see clearly, but clear vision alone does not necessarily mean that the underlying myopia has stopped progressing.

Is Ortho-K suitable for every child?

No. Ortho-K is an excellent option for some children, but it should not be treated as the automatic choice for every child with myopia.

Suitability depends on a combination of clinical and practical factors, including:

• the child's current prescription;
• corneal shape and eye health;
• the amount and pattern of astigmatism;
• how quickly the child's myopia has been progressing;
• axial-length measurements and changes over time;
• tear-film and ocular-surface health;
• the child's ability to cooperate with lens insertion and removal;
• their ability to follow good hygiene procedures; and
• the level of parental supervision available.

This is why an Ortho-K fitting should begin with a proper assessment rather than simply choosing a lens based on spectacle prescription.

Is there a minimum age for Ortho-K?

There is no single age at which every child suddenly becomes suitable for Ortho-K.

Age is only one factor. A younger child with good parental supervision, appropriate eye measurements and a willingness to follow the routine may be a better candidate than an older child who is unable or unwilling to maintain good contact-lens hygiene.

For childhood myopia control, the decision also needs to consider how early the myopia developed and how quickly it appears to be progressing. Children who become myopic at a younger age potentially have more years during which their eyes can continue to grow.

The question is therefore less about reaching a particular birthday and more about whether Ortho-K is clinically appropriate and practically manageable for that particular child and family.

Is Ortho-K safe for children?

Ortho-K is generally considered a safe form of contact-lens wear when the lenses are appropriately fitted, good hygiene is maintained and the child attends regular follow-up appointments.

However, no contact lens is completely free of risk.

The most important serious complication parents should understand is microbial keratitis, an infection of the cornea. It is uncommon, but it can be serious and requires prompt treatment.

A large multicentre study published in the Japanese Journal of Ophthalmology reported approximately 5.4 cases of microbial keratitis per 10,000 patient-years of overnight Ortho-K wear. This figure provides useful context but should not be interpreted as an exact prediction of an individual child's risk.

Good lens hygiene, appropriate fitting and regular aftercare are therefore essential parts of Ortho-K treatment rather than optional extras.

What should parents do to keep Ortho-K wear safe?

Parents play an important role, particularly when a child is first learning to handle the lenses.

Important habits include:

• washing and thoroughly drying hands before touching the lenses;
• cleaning and disinfecting the lenses exactly as instructed;
• using fresh recommended contact-lens solution rather than topping up old solution;
• keeping the lens case clean and replacing it as advised;
• keeping the lenses and storage case away from tap water;
• not wearing a lens that is damaged, contaminated or causing unusual discomfort; and
• attending scheduled follow-up appointments even when vision seems good.

If a child develops significant redness, pain, unusual sensitivity to light, discharge or a sudden reduction in vision, the lenses should be removed and the child should receive prompt professional assessment.

What does an Ortho-K assessment involve?

An Ortho-K lens is not an off-the-shelf contact lens. Its design depends on detailed measurements of the child's eyes.

At EMME Visioncare, assessment includes digital corneal topography, which creates a detailed map of the shape and curvature of the cornea. These measurements help determine whether the cornea is suitable for Ortho-K and guide the custom lens design.

For children undergoing a myopia assessment at EMME, we also measure axial length. This allows us to monitor changes in eye growth over time instead of relying only on spectacle prescription.

You can learn why this matters in our guide to axial length and childhood myopia.

EMME also uses 3D lens-design technology so that the Ortho-K lens can be customised to the child's individual corneal shape and treatment requirements.

What happens after a child starts wearing Ortho-K?

The fitting process does not end when the lenses are collected.

Follow-up is important because the practitioner needs to assess:

• how well the lenses centre on the eyes;
• the corneal response to overnight wear;
• the child's daytime vision;
• comfort and lens handling;
• the condition and cleanliness of the lenses;
• the health of the cornea and surrounding eye structures; and
• for childhood myopia management, whether eye growth is being controlled adequately over time.

Corneal topography can also be repeated to show how the corneal shape has changed and whether the treatment zone is positioned appropriately.

How quickly will a child see clearly with Ortho-K?

The amount of time required varies.

Some children notice a substantial improvement after the first few nights, while others require a longer adaptation period before their daytime vision becomes stable. The speed of treatment depends partly on the starting prescription, corneal shape, lens design and consistency of overnight wear.

Parents should therefore avoid expecting one fixed number of nights to apply to every child.

Temporary supplementary spectacles or another form of correction may sometimes be needed during the early adaptation period.

Does Ortho-K permanently correct myopia?

No.

The corneal reshaping effect is temporary. If Ortho-K wear is stopped, the cornea gradually returns towards its original shape and the original refractive error returns.

This reversibility is one of the differences between Ortho-K and refractive surgery.

There is also an important distinction between the temporary vision-correction effect and myopia control. While the corneal reshaping itself is reversible, slowing excessive eye growth during childhood is the longer-term objective of using Ortho-K for myopia management.

What if my child's myopia still progresses while using Ortho-K?

No myopia-control treatment works equally well for every child.

If monitoring shows that a child's axial length or prescription is still progressing more quickly than expected, the first step is to review the situation carefully. This may include checking lens fit, wear time, adherence, eye-growth measurements and other risk factors.

Depending on the clinical findings, the management plan may need to be adjusted.

Other evidence-based approaches to childhood myopia control include specially designed myopia-control spectacle lenses, myopia-control soft contact lenses and atropine eye drops prescribed by an appropriate medical practitioner.

Some children may require a different treatment strategy or co-management with an ophthalmologist rather than simply continuing the same approach indefinitely.

For an overview of the available options and the evidence behind them, see How Effective Are These Myopia Control Treatments?

Is Ortho-K better than myopia-control glasses or soft contact lenses?

There is no single treatment that is universally best for every child.

Ortho-K has practical advantages for children who value glasses-free daytime vision and is supported by substantial evidence for slowing axial elongation. However, it also requires overnight contact-lens wear, careful cleaning and consistent parent-child cooperation.

Another child may be better suited to a myopia-control spectacle lens or a soft myopia-control contact lens.

The appropriate choice depends on the child's eye measurements, prescription, progression pattern, lifestyle, maturity and family preferences as well as the clinical evidence for each treatment.

Questions parents should consider before choosing Ortho-K

Before deciding, it can be helpful to consider:

• Is my child's myopia actually progressing?
• How quickly has their prescription changed?
• What has happened to their axial length?
• Is their corneal shape suitable for Ortho-K?
• Can my child insert, remove and care for the lenses reliably?
• Will an adult be able to supervise the routine initially?
• Does my child participate in activities where glasses-free daytime vision would be useful?
• What monitoring will be carried out after treatment begins?
• What would we do if the myopia continued to progress?

These questions are more useful than choosing a myopia-control method based only on convenience, advertising or a single percentage quoted from a study.

Ortho-K as part of a broader myopia-control plan

Ortho-K should be viewed as one possible component of childhood myopia management rather than as a cure for myopia.

Good myopia management involves determining whether progression is occurring, measuring the child's eyes appropriately, selecting a suitable intervention and then monitoring the response over time.

Lifestyle also remains important. Children should be encouraged to spend regular time outdoors and to develop sensible habits around prolonged near work, although lifestyle measures do not replace appropriate clinical myopia-control treatment when treatment is indicated.

Should my child have an Ortho-K assessment?

An assessment may be worthwhile if your child has myopia that is increasing, is interested in daytime freedom from spectacles, or you would like to understand whether Ortho-K could form part of their myopia-control plan.

The purpose of the assessment is not to assume that Ortho-K is the answer. It is to determine whether your child's eyes are suitable, understand how their myopia is progressing and discuss the advantages, responsibilities and alternatives with you.

Learn more about Ortho-K fitting at EMME Visioncare, or explore the broader range of childhood myopia control options in Singapore.

References

1. Bullimore MA, Saunders KJ, Baraas RC, et al. IMI—Interventions for Controlling Myopia Onset and Progression 2025. Investigative Ophthalmology & Visual Science. 2025;66(12):39. View reference.
2. Tang K, Si J, Wang X, Lu X, Bi H. Orthokeratology for Slowing Myopia Progression in Children: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Eye & Contact Lens. 2023. View reference.
3. Sartor L, Hunter DS, Vo ML, et al. Benefits and risks of orthokeratology treatment: a systematic review and meta-analysis. International Ophthalmology. 2024;44:239. View reference.
4. Hiraoka T, Matsumura S, Hori Y, Kamiya K, Miyata K, Oshika T. Incidence of microbial keratitis associated with overnight orthokeratology: a multicenter collaborative study. Japanese Journal of Ophthalmology. 2025;69(1):139-143. View reference.
5. Gifford KL, Richdale K, Kang P, et al. IMI—Clinical Management Guidelines Report. Investigative Ophthalmology & Visual Science. 2019;60(3):M184-M203. View reference.

This article is intended for general educational purposes and does not replace an individual eye examination, contact-lens assessment or medical advice.