Objective:

To address the challenges of managing astigmatism in orthokeratology (ortho-k) for myopia control.

Key Findings:

• Initial treatment caused halos and glare at night due to uncorrected residual astigmatism.
• Redesigning the lens to an oval shape improved night vision symptoms significantly.
• The modified lens better aligned with the patient's corneal astigmatism, enhancing visual outcomes.

Interpretation:

Customizing ortho-k lens designs, particularly for patients with astigmatism, is crucial for optimizing visual quality and addressing specific visual disturbances.

Limitations:

• The case study is based on a single patient, limiting generalizability.
• Long-term effects of the lens redesign were not evaluated.

Conclusion:

Understanding and customizing treatment zone geometry in ortho-k is essential for effectively managing astigmatism and improving patient satisfaction.