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Visual, refractive and topographic outcomes of progressive thickness intrastromal corneal ring segments for keratoconic eyes

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A Correction to this article was published on 27 August 2020

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Abstract

Purpose

To evaluate one-year visual, refractive, and topographic outcomes of 58 eyes of 53 keratoconus patients who underwent surgery with a progressive thickness intrastromal corneal ring segment (ICRS).

Methods

This multi-center, retrospective, observational study evaluates the one-year effects of progressive thickness ICRS implanted in keratoconus patients meeting the inclusion criteria. One or two progressive ICRS were implanted in the selected eyes after creating an intrastromal tunnel with a femtosecond laser. Pre- and postoperative uncorrected distance visual acuity, best-corrected distance visual acuity, manifest refraction (both spherical equivalent and cylindrical refractions), corneal astigmatism, maximum keratometry, corneal thickness, and corneal topography measurements and indices were evaluated.

Results

In this retrospective case series, 58 eyes of 53 keratoconus patients were included with a follow-up of 12 months. The mean age was 30.89 ± 11.90 years. There were improvements postoperatively in mean values of visual acuities, both uncorrected from 0.71 (preoperatively) to 0.28 (log MAR), and best-corrected from 0.28 to 0.10 (log MAR), mean cylindrical refraction from − 2.35 ± 1.51 to − 4.15 ± 2.23 D, and mean spherical equivalent from − 2.10 ± 2.25 to − 4.64 ± 3.2 D. There was also a reduction in maximal keratometry from 54.21 D preoperatively to 50.93 D postoperatively.

Conclusion

The implantation of the progressive thickness ICRS is an effective and safe method to improve the vision of keratoconic eyes. Corneal stability was maintained at the 12-month mark.

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Change history

  • 27 August 2020

    In the original publication, the Results paragraph of the abstract was published incorrectly. The correct version should read as follows.

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Acknowledgements

Giorgio Pirazzini provided assistance with editing the manuscript.

Funding

All authors have no financial interest in the products or brands mentioned in this study. No funding is reported for the development of this study.

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Authors and Affiliations

  1. Dunyagoz World Eye Hospital, Istanbul, Turkey

    Efekan Coşkunseven, Onurcan Sahin & Isilay Kavadarli

  2. VisareRIO, Rio De Janeiro, Brazil

    Renato Ambrósio Jr.

  3. NeoVízia očná klinika, Bratislava, Slovakia

    Adriana Smorádková

  4. Novavision Laser Center, Naucalpan, Mexico

    Francisco Sánchez León

  5. LaserFocus, Belgrade, Serbia

    Mirko R. Jankov II

Authors
  1. Efekan Coşkunseven
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  2. Renato Ambrósio Jr.
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  3. Adriana Smorádková
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  4. Francisco Sánchez León
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  5. Onurcan Sahin
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  6. Isilay Kavadarli
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  7. Mirko R. Jankov II
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Corresponding author

Correspondence to Efekan Coşkunseven.

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Conflict interest

:Drs. Coşkunseven and Ambrósio are paid consultants for Mediphacos. Drs. Smorádková, Sánchez León, Sahin, Kavadarlı and Jankov have no conflict of interest.

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Coşkunseven, E., Ambrósio, R., Smorádková, A. et al. Visual, refractive and topographic outcomes of progressive thickness intrastromal corneal ring segments for keratoconic eyes. Int Ophthalmol 40, 2835–2844 (2020). https://doi.org/10.1007/s10792-020-01467-5

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  • DOI: https://doi.org/10.1007/s10792-020-01467-5

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