Can orthokeratology lenses correct astigmatism?

　　In daily life, many adolescents develop myopia due to poor eye hygiene or unhealthy visual habits—conditions that significantly impact their ocular health and require treatment. Orthokeratology (ortho-k) lenses are one such treatment option. But can ortho-k lenses correct astigmatism?

　　Can ortho-k lenses correct astigmatism?

　　Ortho-k lenses cannot fundamentally correct astigmatism. However, if a patient has astigmatism, wearing ortho-k lenses for a period of time may lead to a marked reduction—or even temporary disappearance—of the astigmatism. Yet, once ortho-k lens wear is discontinued for an extended period, the astigmatism typically reappears. This phenomenon occurs primarily because astigmatism stems from irregularities in corneal development, which cannot be permanently corrected through postnatal interventions. Indeed, during refraction examinations after ortho-k lens use, astigmatism often appears significantly reduced; however, it tends to recur over time. It is therefore unrealistic to expect complete resolution of astigmatism using current non-surgical methods. That said, laser refractive surgery remains a viable and clinically proven option for correcting astigmatism in adults.

　　Ortho-k lenses are rigid gas-permeable contact lenses worn overnight to temporarily reshape the cornea and control myopia progression. They are removed during the day, allowing patients to enjoy clear unaided vision throughout daylight hours. Most users are children; however, ortho-k lenses offer minimal corrective effect for astigmatism. To effectively address astigmatism, clinicians must first identify its underlying cause based on the patient’s individual condition and symptoms—and then implement targeted treatment. Relying solely on ortho-k lens wear is ineffective for astigmatism correction.

　　Patients are advised to prioritize adequate rest, avoid prolonged smartphone use, and maintain a balanced daily schedule. We hope this information proves helpful.