Objective:

To discuss advancements in orthokeratology (ortho-k) lens technology for correcting astigmatism.

Key Findings:

• Toric ortho-k lenses are recommended when corneal elevation difference exceeds 30 µm.
• Residual astigmatism can occur if corneal and refractive astigmatism are mismatched.
• Under-correcting corneal cylinder can lead to better visual outcomes.

Interpretation:

Practitioners should consider the balance between corneal and refractive astigmatism when selecting ortho-k lenses to minimize residual astigmatism.

Limitations:

• The study is based on a single case example, limiting generalizability.
• Further research is needed to establish broader guidelines for astigmatism correction in ortho-k.

Conclusion:

Tailoring ortho-k lens design, including the use of spherical lenses or customized toricity, can enhance visual outcomes for patients with astigmatism.