Author: Dr Val Phua
Estimated reading time: 10–12 minutes
Orthokeratology Offers More Than Freedom from Glasses
Many parents are surprised to learn that a child can wake up each morning with clear vision—without needing to wear glasses or contact lenses during the day.
Orthokeratology, commonly known as Ortho-K, makes this possible by using specially designed contact lenses worn overnight to gently reshape the front surface of the eye while your child sleeps.
More importantly, Ortho-K is not just about convenience. Numerous studies have shown that it can slow the progression of childhood myopia, helping reduce the risk of developing high myopia and its associated eye diseases later in life.
What Is Orthokeratology?
Orthokeratology is a non-surgical method of correcting myopia using rigid gas-permeable contact lenses that are worn overnight.
While sleeping, the lenses gently reshape the cornea. When the lenses are removed the following morning, light focuses more accurately on the retina, allowing clear vision throughout the day without spectacles or daytime contact lenses.
The effect is temporary, so the lenses must be worn regularly to maintain the result.
How Does Ortho-K Slow Myopia?
Myopia develops because the eye grows too long from front to back.
Research suggests that Ortho-K changes the way light focuses on the peripheral retina, reducing the stimulus for excessive eye growth.
By slowing axial elongation, Ortho-K can reduce the rate at which myopia progresses during childhood.
The goal is not simply to improve vision today but to reduce the lifetime risk of complications associated with high myopia.
Who Is Suitable for Ortho-K?
Orthokeratology may be suitable for children who:
- Have progressing myopia
- Are motivated to wear contact lenses
- Have healthy eyes
- Can maintain good lens hygiene with parental support
- Participate in sports or other activities where glasses may be inconvenient
It may also be suitable for selected adults who wish to reduce dependence on spectacles but are not suitable for laser vision correction.
A comprehensive eye examination is required to determine whether Ortho-K is appropriate.
What Happens During an Ortho-K Assessment?
An Ortho-K assessment usually includes:
- Comprehensive eye examination
- Refraction (spectacle prescription)
- Corneal topography to map the shape of the cornea
- Measurement of corneal health and tear film
- Discussion of lifestyle and expectations
These measurements allow customised lens selection for each patient.
How Long Does It Take to Work?
Many patients notice significant improvement after the first night of wear.
However, vision usually continues to stabilise over several days to two weeks.
During this period, several follow-up visits are required to assess vision, corneal health and lens fit.
Is Ortho-K Safe?
When fitted appropriately and combined with good hygiene, Orthokeratology is generally considered safe.
However, as with any contact lens treatment, complications can occur.
The most important risk is microbial keratitis, a potentially serious corneal infection.
Fortunately, this risk can be significantly reduced by:
- Careful hand hygiene
- Proper lens cleaning
- Regular follow-up
- Avoiding water exposure
- Prompt review if redness or pain develops
Parents play an important role in supervising younger children.
Advantages of Orthokeratology
Ortho-K offers several benefits:
- Clear daytime vision without glasses
- No daytime contact lenses
- Effective myopia control
- Excellent option for active children
- Helpful for sports and swimming (without lenses in the water)
Many children also appreciate the increased confidence associated with spectacle-free daytime vision.
Possible Disadvantages
Like all treatments, Ortho-K has limitations.
These include:
- Daily overnight lens wear
- Ongoing cleaning and maintenance
- Need for regular reviews
- Temporary treatment effect
- Higher cost than standard spectacles
- Small risk of contact lens-related complications
Success depends on consistent lens wear and good compliance.
Can Ortho-K Be Combined with Other Treatments?
Yes.
Children with rapidly progressing myopia may benefit from combination therapy.
Examples include:
- Orthokeratology plus low-dose atropine
- Orthokeratology together with increased outdoor time
- Healthy visual habits and reduced prolonged near work
Treatment should always be individualised.
Frequently Asked Questions
Is Ortho-K permanent?
No.
The cornea gradually returns to its original shape if lens wear is discontinued.
Can my child still play sports?
Yes.
This is one of the major advantages of Ortho-K, as children can participate in sports without wearing glasses or daytime contact lenses.
Is Ortho-K painful?
Most children adapt quickly.
Some awareness of the lenses may occur initially, but they are usually comfortable once the eyes are closed during sleep.
Does Ortho-K cure myopia?
No.
Ortho-K temporarily corrects vision and helps slow myopia progression but does not permanently cure myopia.
The Bottom Line
Orthokeratology offers two important benefits: clear daytime vision without glasses and evidence-based slowing of childhood myopia progression.
When combined with good lens hygiene, regular follow-up and healthy visual habits, Ortho-K can be an excellent option for suitable children. The best treatment is one that matches your child’s eyes, lifestyle and long-term visual needs.
References
- International Myopia Institute. IMI Clinical Management Guidelines.
- World Society of Paediatric Ophthalmology and Strabismus. Consensus Statement on Myopia Management.
- American Academy of Ophthalmology. Orthokeratology and Myopia Control.
- British Contact Lens Association. Orthokeratology Practice Guidance.
- International Academy of Orthokeratology and Myopia Control. Evidence-Based Orthokeratology.
