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Intracorneal ring segment implantation in advanced Keratoconus.

Philip W Dockery1,2, John S Parker2, Erik M Massenzio1

  • 1Wills Eye Hospital, Philadelphia, USA.

European Journal of Ophthalmology
|February 6, 2023
PubMed
Summary
This summary is machine-generated.

Intracorneal ring segment (ICRS) implantation offers greater visual and topographic benefits for advanced keratoconus (KCN) patients. This study found no increased risk of common complications in these patients.

Keywords:
ICRSKeratoconusintacsintracorneal ring segment implantation

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Vision Science

Background:

  • Keratoconus (KCN) is a progressive corneal ectasia.
  • Intracorneal ring segments (ICRS) are used to improve vision in KCN patients.
  • The efficacy of ICRS in advanced KCN requires further investigation.

Purpose of the Study:

  • To compare clinical outcomes of ICRS implantation in eyes with advanced versus mild/moderate keratoconus.
  • To evaluate the impact of preoperative keratometry on ICRS outcomes.

Main Methods:

  • Retrospective analysis of 141 eyes from 111 KCN patients undergoing ICRS implantation.
  • Eyes were categorized by preoperative maximum keratometry (Kmax): <57 D (mild/moderate) and >57 D (advanced).
  • Outcomes assessed included corrected distance visual acuity (CDVA), Kmax, and complications at 1 day, 1 month, and 1 year.

Main Results:

  • Eyes with Kmax >57 D showed a greater reduction in axial curvature (7.0 D vs. 5.5 D, p=0.005) and gained more lines of CDVA (3 vs. 1, p<0.001) at 1 year compared to eyes with Kmax <57 D.
  • No significant differences in the incidence of explantation, extrusion, or infectious keratitis were observed between the groups.

Conclusions:

  • ICRS implantation yields superior visual and topographic improvements in advanced keratoconus.
  • The procedure does not increase the risk of the most common complications in advanced KCN cases.