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Intrastromal corneal ring segment implantation (KeraRing 355°) in patients with keratoconus: 3 months follow-up data

Poster Details

First Author: K.Jadidi IRAN

Co Author(s):    S. Mosavi   M. Naderi   F. Nejat   L. Janani   S. Serahati   A. Alishiri

Abstract Details


To evaluate the efficacy and safety of Keraring 355º intrastromal corneal ring (ICR; Mediphacos, Belo Horizonte, Brazil) implantation aided by PocketMaker microkeratome (DIOPTEX GmbH, Austria for the treatment of keratoconus.


Bina Eye Hospital Research Center, Tehran, Iran


This study included 15 eyes of 15 patients (mean age, 28.87±6.94 years) with nipple-type keratoconus who underwent ICR implantation (KeraRing355°) using mechanical dissection with the PocketMaker microkeratome. Uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), refraction, topographic findings, safety, efficacy index and adverse events were reported at 3 months postoperatively.


At the 3-month follow-up visit, there was a statistically significant reduction in the spherical equivalent refractive error (-0.10 [2.4] postoperative versus -2.97[1.74] D preoperative, p=0.027). Mean UCVA (logMAR) improved from 0.8 (0.46) preoperatively to 0.41 (0.24) postoperatively (p=0.006), while mean BSCVA (logMAR) improved from 0.33 (0.18) to 0.29 (0.17, p=0.574).Additionally, the mean K reading decreased by 5.26 D (from 46.93 D to 41.67 D, p=0.001). No intraoperative and postoperative complications were demonstrated in this series of patients.


The outcomes of the preliminary study show that the ICRS (KeraRing 355°) implantation is an efficient and minimally invasive procedure for improving visual acuity in patients with nipple-type keratoconus FINANCIAL INTEREST: NONE

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