Back to Journals » International Medical Case Reports Journal » Volume 11

Implantation of intracorneal ring segments in pediatric patients: long-term follow-up

Authors Abreu AC, Malheiro L, Coelho J, Neves MM, Gomes M, Oliveira L, Menéres P

Received 11 September 2017

Accepted for publication 2 November 2017

Published 7 February 2018 Volume 2018:11 Pages 23—27


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Scott Fraser

Ana Carolina Abreu,1 Luisa Malheiro,1 João Coelho,1 Miguel Mesquita Neves,1 Miguel Gomes,1,2 Luis Oliveira,1,2 Pedro Menéres1,2

1Ophthalmology Department of Hospital de Santo António – Centro Hospitalar do Porto, Porto, Portugal; 2Ophthalmology Department, Instituto de Ciências Biomédicas Abel Salazar (ICBAS) – Universidade do Porto, Porto, Portugal

Purpose: To analyze the long-term outcomes of intracorneal ring segments (ICRS) implantation for keratoconus management in pediatric patients.
Methods: Retrospective case series review of the long-term (>5 years) outcomes of Intacs® ICRS implantation for keratoconus in pediatric patients (age <18 years old at the time of surgery) between January 2008 and December 2011 at Ophthalmology Department of Hospital de Santo António. Demographic data, follow-up time, preoperative and postoperative uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA) in decimal scale, and corneal topography were evaluated. Statistical analysis was done using SPSS for windows (version 24). Significance was set at p<0.0125.
Results: Fourteen eyes of 14 patients, with a mean age of 15.36 years (range 10–18 years), were included in this study. All patients had been diagnosed with keratoconus with reported progression in the 6 months prior to surgery. Follow-up time was 6.36±0.97 years. UCVA and BCVA improved after ICRS implantation (p<0.0125). Keratometry (K) minimum (Kmin) and K maximum (Kmax) decreased after surgery (p<0.0125). During follow-up, UCVA, BCVA, Kmin, and Kmax values ranged, showing a tendency to worsen at the end of follow-up. However, statistically significant differences were not observed.
Conclusion: ICRS implantation showed good visual and topographic results in pediatric patients. Long-term follow-up suggests that, despite ICRS implantation, there is still progression of keratoconus. To the best of our knowledge, there are no reports regarding the long-term efficacy of ICRS implantation in pediatric patients.

Keywords: intracorneal ring segments, keratoconus, pediatric patients

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]  View Full Text [HTML][Machine readable]