Objective:

To evaluate the effectiveness of orthokeratology (ortho-k) contact lenses in controlling myopia progression in a 12-year-old patient with a history of increasing myopia.

Key Findings:

• Ortho-k lenses caused myopic defocus, which has been shown in numerous clinical studies to slow myopia progression.
• The ideal corneal shape post-ortho-k treatment is a centrally flattened zone, crucial for effective treatment.
• Controversial findings exist regarding the impact of lens decentration on axial length changes in children, with some studies indicating minimal effects.

Interpretation:

While ortho-k lenses are effective in myopia control, ensuring the treatment zone aligns with the pupil center is crucial for achieving optimal results.

Limitations:

• Controversial findings exist regarding the impact of lens decentration on axial length, necessitating further investigation.
• Further studies are needed to determine the optimal parameters for myopia control, including defocus magnitude and lens design.

Conclusion:

Future research on defocus and lens design will significantly influence fitting practices for eyecare professionals, potentially improving myopia management.