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Femtosecond laser-assisted intrastromal corneal ring segment Implantation for visual rehabilitation of keratoconus

Poster Details

First Author: S.Ozcan TURKEY

Co Author(s):    N. Solmaz   M. Onder   G. Koca   F. Onder     

Abstract Details

Purpose:

To evaluate the visual and refractive outcomes of femtosecond laser-assisted intrastromal corneal ring segments (ICRS) implantation in patients with keratoconus.

Setting:

Department of Ophthalmology, Haseki Training and Research Hospital, Istanbul, Turkey. Dunya Eye Hospital, Istanbul, Turkey.

Methods:

This retrospective study comprised patents with keratoconus who were contact lens intolerant. Thirty eyes of 25 patients were evaluated. Corneal tunnels were created using femtosecond laser in a private laser center. ICRS (Ferrara type) implantation was performed in our clinic (Training and Research Hospital) on the same day. Implantation parameters were identified by the manufacturer nomogram. The preoperative and postoperative uncorrected visual acuity (UCVA), best-spectacle corrected acuity (BSCVA), subjective refraction and topoghraphical corneal curvature values were compared using the Wilcoxon signed-rank test, taking p ≤ 0.05 as statistically significant.

Results:

The mean age was 26.9±6.4 (15-39) years and mean follow-up was 18.0±12.9 (6-48) months. During the follow-up period, the mean UCVA and BCVA improved from 0.10±0.1 to 0.36±0.3 and from 0.37±0.2 to 0.59±0.3, respectively (p ≤ 0.001). The mean simulated maximum(SimKmax) decreased from 54.8±5.1 D to 51.0±4.7 D and minimum K (SimKmin) from 49.6±4.5 D to 47.9±4.3 D. The mean reduction in topographic astigmatism was 2.3±2.6D (p ≤ 0.001). In the postoperative early period, ICRS exchange and reposition were performed in 4 eyes due to improper refractive change and segment migration.

Conclusions:

Femtosecond laser assisted ICRS implantation was an effective and reliable procedure for visual rehabilitation of keratoconus patients with satisfactory visual results and low complication rate.

Financial Disclosure:

NONE

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