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December 2, 2025Cornea

Long-Term Outcomes of Progressive Thickness Intrastromal Corneal Ring Segments for Keratoconic Eyes: A 4-Year Follow-Up

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Uncorrected distance visual acuity improved significantly to 0.28 logMAR at four years after KeraRing AS implantation, indicating successful initial outcomes.
Femtosecond-assisted KeraRing AS implantation in 36 eyes achieved a mean spherical equivalent of -1.68 D at four years, pointing to notable regression post-operation.
Keratometric indices and astigmatic changes were measured, revealing increases in parameters over the follow-up period, underscoring the need for long-term monitoring.
Long-term outcomes highlight that while vision improves initially, careful management is essential to address potential recurrence of astigmatism and other metrics.

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Historical cohort study shows improvements in visual outcomes for keratoconus, but astigmatism may recur over time.

Khorrami‐Nejad et al. (2025) studied this question.

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