Objective:

To explore the benefits and fitting factors of orthokeratology (ortho-k) in myopia control.

Approach:

Key Findings:

• Ortho-k can slow myopia progression by an average of about 50%.
• Proper lens centration ensures effective myopic defocus and clear vision.
• The back optic zone diameter (BOZD) affects the size of the treatment zone, influencing myopia control.

Interpretation:

Ortho-k lenses are effective in managing myopia, but their success depends on proper fitting and individual patient characteristics.

Limitations:

• Higher refractive errors may lead to reduced vision due to partial correction.
• Some applications of ortho-k for higher myopia and astigmatism are considered off-label.

Conclusion:

Ortho-k lenses are a valuable option for myopia control, requiring careful consideration of fitting parameters for optimal outcomes.

Sources:

• Hiraoka T. Myopia Control With Orthokeratology: A Review.
• Walline JJ. Myopia Control: A Review.
• Gong G, Zhang BN, Guo T, et al. Efficacy of orthokeratology lens.
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