Ortho-K for Myopia Management

Orthokeratology (ortho-k) is an effective, non-surgical method to slow myopia progression in children by temporarily reshaping the cornea and inducing peripheral myopic defocus.

Myopia, or nearsightedness, occurs when the eyeball elongates excessively, causing distant objects to appear blurry. Its progression is influenced by genetic and environmental factors, including prolonged near work and insufficient outdoor exposure. Bright outdoor light stimulates retinal dopamine release, which acts as a natural signal to slow eye growth, making outdoor activity a key preventive measure for children.

How Orthokeratology Works

Orthokeratology involves rigid gas-permeable contact lenses that are custom-made for your child’s cornea to be worn overnight that temporarily reshape the cornea. This reshaping corrects vision for daytime clarity without glasses and creates peripheral myopic defocus, which signals the eye to slow axial elongation. By altering how light focuses across the retina, ortho-k addresses the underlying mechanism of myopia progression rather than just correcting refractive error.

Efficacy of Orthokeratology

Clinical studies and meta-analyses indicate that ortho-k can reduce axial elongation by approximately 0.25 mm over two years compared to single-vision spectacles or regular contact lenses. A study comparing ortho-k with peripheral defocus spectacle lenses found that ortho-k induced stronger myopic defocus across the retina, although axial elongation was slightly greater in the ortho-k group over six months, highlighting the importance of individualized treatment planning. Factors such as age, baseline refractive error, and ethnicity may influence treatment outcomes, with younger children often showing greater benefit. Orthok is considered safe for children as young as six years old. Common adverse events include mild irritation, and lens discomfort, while serious complications like microbial keratitis are rare but possible with any contacts lens wearer. Proper lens hygiene, regular follow-ups, and adherence to wearing schedules are essential to minimize risks.

Comparison with Other Myopia Control Methods

• Peripheral defocus spectacle lenses (Stellest): These glasses shift light on the peripheral retina to slow eye growth. Some studies suggest they may be slightly less effective at myopia control than ortho-k, but they might be easier for younger kids or those that do not like wearing Ortho-K lenses.

• Lifestyle interventions: Increasing outdoor time (1–2 hours daily) and managing near work are effective complementary strategies.

Choosing between ortho-k and other myopia control strategies depends on child’s age, lifestyle, prescription, and tolerance for contact lenses. Eye care providers can tailor interventions based on retinal defocus patterns, axial length measurements, and risk factors for progression that are unique to your child to optimize outcomes.
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Orthokeratology is a well-supported, effective method for slowing myopia progression in children, particularly when combined with outdoor activity and careful monitoring.