Orthokeratology, or Ortho-K, is a non-surgical vision correction treatment using specially designed rigid contact lenses worn overnight. While you sleep, the lenses gently and temporarily reshape the cornea, allowing you to see more clearly during the day without glasses or daytime contact lenses.
Ortho-K is mainly used for myopia correction and can also help with certain types of astigmatism. It is particularly interesting for children and teenagers with progressing myopia, as research shows that Ortho-K can help slow myopia progression in many children.
The treatment is temporary and reversible, so regular overnight wear is needed to maintain the effect.
A successful Ortho-K treatment requires more than simply choosing a lens. A comprehensive eye examination, detailed corneal topography, customized lens design, precise fitting, and regular follow-up are essential.
Ortho-K can offer greater freedom during sports and daily activities and provides a non- surgical alternative to glasses or daytime contact lenses. However, because the lenses are worn overnight, proper hygiene, lens care, and professional monitoring are extremely important.
At Eye Care Optic, we evaluate each patient individually to determine whether Ortho-K is suitable for their eyes, prescription, lifestyle, and visual needs.
Interested in Ortho-K? Book a consultation at Eye Care Optic and discover whether overnight corneal reshaping could be right for you or your child.
Many people are surprised to learn that specially designed contact lenses can be worn while you sleep and then removed in the morning, allowing you to see clearly during the day without wearing glasses or daytime contact lenses.
This treatment is called Orthokeratology, commonly known as Ortho-K or overnight corneal reshaping.
At Eye Care Optic, we use advanced contact lens fitting techniques to evaluate whether Ortho-K may be suitable for your eyes and your visual needs.
Orthokeratology is a non-surgical vision correction treatment that uses specially designed rigid gas-permeable contact lenses worn overnight.
While you sleep, the lenses gently and temporarily reshape the front surface of the eye, called the cornea. When the lenses are removed in the morning, the cornea retains the desired shape for a period of time, allowing clearer vision during the day.
The effect is temporary, which means the lenses need to be worn regularly according to the prescribed schedule to maintain the visual result. If Ortho-K wear is stopped, the cornea gradually returns toward its original shape and the original refractive error can return.
Think of Ortho-K somewhat like a retainer used after orthodontic treatment: regular use helps maintain the desired result.
Ortho-K is mainly used for people with myopia (short-sightedness) and, depending on the lens design and the individual's eye shape, it can also be used to manage certain amounts and types of astigmatism.
It can be particularly attractive for:
Not everyone is a suitable candidate. A detailed eye examination and corneal evaluation are essential before treatment.
One of the most important reasons Ortho-K has become increasingly popular is its role in myopia management.
Myopia is not only about needing stronger glasses. In many children, the eye continues to grow longer as myopia progresses. Higher levels of myopia are associated with an increased lifetime risk of certain eye complications.
Clinical research has shown that orthokeratology can slow the progression of myopia in many children, although the response varies from one child to another. The International Myopia Institute currently considers orthokeratology one of the evidence-supported optical approaches for myopia management.
For this reason, when a child has progressing myopia, the goal may be more than simply achieving clear vision. The eye care professional also considers how to reduce the rate at which myopia progresses.
An Ortho-K lens is not a standard rigid contact lens.
It is specially designed based on the shape and measurements of the patient's cornea. During overnight wear, the lens interacts with the tear film and gently modifies the shape of the corneal surface.
The central cornea becomes flatter, while changes in the surrounding cornea create the optical effect needed to improve daytime vision. These corneal changes are reversible and are monitored during follow-up visits.
This is why accurate corneal measurements and precise lens design are so important.
Ortho-K is not simply a matter of choosing a contact lens according to the glasses prescription.
A professional fitting usually involves:
1. Comprehensive eye examination
Your vision, refraction, eye health and contact lens suitability are assessed.
2. Detailed corneal measurements
The shape and curvature of the cornea are evaluated using corneal topography or other
specialized measurements.
3. Individual lens design
The Ortho-K lens is selected or designed according to the patient's corneal shape, prescription
and treatment goals.
4. Trial and evaluation
The lens is fitted and the eye is carefully assessed to make sure the lens is centering and
behaving appropriately.
5. Follow-up
Follow-up examinations are an essential part of Ortho-K treatment. The cornea, vision, lens fit
and overall eye health are monitored, and the treatment can be adjusted when necessary.
The visual effect can begin after the first few nights, but the exact response is different for every patient.
Some patients experience very good daytime vision quickly, while others require a longer period of adaptation or further lens adjustments.
The final result depends on factors such as the prescription, corneal shape, lens design, wearing schedule and individual response.
It is important to understand that Ortho-K is a process, not simply a lens that produces an instant permanent correction.
For the right patient, Ortho-K can provide several important advantages.
Clear vision during the day
After removing the lenses in the morning, many patients can function throughout the day without glasses or daytime contact lenses.
Freedom during sports and activities
Swimming, running, football and other activities can be more convenient without glasses or daytime contact lenses.
A non-surgical approach
Ortho-K changes the shape of the cornea temporarily and does not involve laser surgery.
An option for myopia management
For children with progressing myopia, Ortho-K may be considered as part of an individualized myopia management strategy.
It is reversible
Unlike laser refractive surgery, the corneal reshaping effect of Ortho-K is temporary. When the treatment is discontinued, the cornea generally moves back toward its previous shape.
When appropriately prescribed, professionally fitted and carefully maintained, Ortho-K can be a useful treatment option. However, it is still overnight contact lens wear, and overnight lens wear carries a greater risk of corneal infection than ordinary daytime contact lens wear.
This is especially important when treating children.
Good hygiene and strict lens-care instructions are therefore essential. Patients should follow the prescribed cleaning and disinfection routine, avoid exposing lenses to inappropriate water sources, and attend all scheduled follow-up examinations.
If the eye becomes significantly red, painful, unusually sensitive to light, or vision suddenly becomes worse, the lens should not be worn and prompt professional evaluation is important.
No.
Children can be excellent candidates for Ortho-K, particularly when myopia is progressing, but suitability must be assessed individually.
The child's eye health, corneal shape, prescription, ability to follow hygiene instructions, parental involvement and willingness to attend follow-up appointments are all important considerations.
Parents should also understand that myopia control does not mean that myopia will necessarily stop completely. The objective is to reduce the rate of progression and protect the child's long-term visual health as much as possible.
Yes.
Ortho-K is not only for children. Adults may choose it because they want clear daytime vision without wearing glasses or daytime contact lenses.
However, the suitability of treatment depends on the individual eye and prescription. A proper assessment is necessary before deciding whether Ortho-K is the right option.
The effect of Ortho-K is temporary.
If you stop wearing the lenses according to the prescribed schedule, the cornea gradually moves back toward its original shape and the refractive error can return. The rate at which this happens varies between individuals.
This means Ortho-K is a treatment that requires ongoing maintenance, rather than a one-time correction.
There is no single vision correction method that is best for everyone.
Glasses are simple, safe and easy to use. Daytime contact lenses can provide excellent vision without glasses. Ortho-K offers another option: wearing specially designed lenses at night and enjoying lens-free or glasses-free daytime vision.
For children with progressing myopia, the decision is broader because the goal may also include myopia management.
The best choice depends on the patient's age, prescription, corneal shape, lifestyle, eye health, and personal preferences.
A successful Ortho-K treatment depends on more than the lens itself.
The measurements, lens design, fitting, follow-up and patient compliance all matter.
Every cornea is different, which is why Ortho-K should be treated as a customized clinical process rather than a standard contact lens purchase.
At Eye Care Optic, we evaluate each patient individually and use detailed corneal measurements to determine whether Ortho-K is appropriate and how the treatment should be planned.
Ortho-K can be an exciting option for patients who want clear daytime vision without glasses or daytime contact lenses, and it can also play an important role in myopia management for suitable children.
But the right question is not simply:
"Does Ortho-K work?"
The more important question is:
"Is Ortho-K suitable for my eyes, my prescription, and my lifestyle?"
A professional assessment is the best way to answer that question.
Book an Ortho-K consultation at Eye Care Optic to have your eyes and corneal shape evaluated and to discuss whether Orthokeratology could be a suitable option for you or your child.
Ortho-K is a medical contact lens treatment and should only be fitted and monitored by an appropriately qualified eye-care professional.
