Intrastromal corneal ring segment implantation in pediatric patients with keratoconus: long-term follow-up

Authors

  • Catarina Castro Centro Hospitalar Universitário de Santo António https://orcid.org/0000-0002-7707-7861
  • Nisa Silva Unidade Local de Saúde de Matosinhos – Hospital Pedro Hispano
  • Ana Carolina Abreu Centro Hospitalar Universitário de Santo António
  • Saul Pires Centro Hospitalar Universitário de Santo António https://orcid.org/0000-0003-3461-2876
  • Miguel Mesquita Neves Centro Hospitalar Universitário de Santo António https://orcid.org/0000-0002-3080-6035
  • Miguel Gomes Centro Hospitalar Universitário de Santo António
  • Oliveira Luis Centro Hospitalar Universitário de Santo António
  • Pedro Menéres Centro Hospitalar Universitário de Santo António, ICBAS – Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto

DOI:

https://doi.org/10.31288/oftalmolzh20234913

Keywords:

Keratoconus, Intrastromal corneal ring segments, visual acuity, keratometry

Abstract

Purpose: To evaluate the long-term outcomes of Intrastromal Corneal Ring Segments (ICRS) implantation in pediatric patients with keratoconus. 

Methods: Retrospective analysis of eyes with ICRS implantation in pediatric age. Uncorrected (UCVA) and best-corrected (BCVA) visual acuity, maximum and minimum keratometry (Kmax and Kmin), and corneal thickness at the thinnest point (CTTP) were evaluated preoperatively, 6 to 12 months after surgery, 5 years after surgery, and at the last follow-up visit (>10 years after surgery). 

Results: Fourteen eyes (10 patients) were included. In 5 eyes all ICRS were explanted and in 1 eye, one of the segments was explanted. UCVA (p=0.028) and BCVA (p=0.028) improved 6 to 12 months after surgery and remained stable afterwards (p>0.999). There was a decrease in Kmax and Kmin 6 to 12 months after surgery (p<0.001 and p=0.012, respectively), with subsequent stability at the 5-year follow-up (p=0.736 and p=0.056, respectively). Kmax remained stable at the last follow-up (p>0.999) but there was an increase in Kmin (p=0.028). There were no changes in CTTP (p=0.097).

Conclusion: ICRS implantation seems to be a minimally invasive, and reversible procedure that leads to improvement of BCVA and keratometry readings.  Despite this, the need for explantation increased overtime.

Author Biographies

Catarina Castro, Centro Hospitalar Universitário de Santo António

Ophthalmology Department

Ana Carolina Abreu, Centro Hospitalar Universitário de Santo António

Ophthalmology Department

Saul Pires, Centro Hospitalar Universitário de Santo António

Ophthalmology Department

Miguel Mesquita Neves, Centro Hospitalar Universitário de Santo António

Ophthalmology Department

Miguel Gomes, Centro Hospitalar Universitário de Santo António

Ophthalmology Department

Oliveira Luis, Centro Hospitalar Universitário de Santo António

Ophthalmology Department

Pedro Menéres, Centro Hospitalar Universitário de Santo António, ICBAS – Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto

Ophthalmology Department

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Published

2023-09-04

How to Cite

1.
Castro C, Silva N, Abreu AC, Pires S, Mesquita Neves M, Gomes M, Luis O, Menéres P. Intrastromal corneal ring segment implantation in pediatric patients with keratoconus: long-term follow-up. J.ophthalmol. (Ukraine) [Internet]. 2023 Sep. 4 [cited 2024 Dec. 30];(4):9-13. Available from: https://ua.ozhurnal.com/index.php/files/article/view/47

Issue

No. 4 (2023): Journal of Ophthalmology (Ukraine)

Section

Clinical Ophthalmology

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Copyright (c) 2023 Castro C., Silva N., Pires S., Abreu A. C., Neves M. M., Gomes M., Oliveira L., Menéres P.

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