Visual Outcome and Topographic Parameters Stability after Corneal Ring Segment Surgery in Keratoconus

Topographic Parameters Stability after Corneal Ring Segment Surgery in Keratoconus

Abstract

Keratoconus is a bilateral, non-inflammatory disease that leads to the bulging outward of a cone-shaped cornea affecting both genders. The major symptoms are blurring of vision, distortion of images, and difficulty in night driving. Objectives: To find the improvement in distance best corrected visual acuity (BCVA) and maximum keratometry (Kmax) from the baseline values up to three months following the implantation of ICRS. Methods: This study was employed as a retrospective consecutive cohort, which included all eligible keratoconus subjects visting Out Patient Department, Fatima Memorial Hospital. All twenty-five cases underwent a comprehensive clinical ocular examination followed by Pentacam corneal topography. Those willing for the Kerrara ring segment implant for visual rehabilitation were enrolled. All surgeries were performed by a single surgeon with Femtolaser technology. Results: A total of twenty-five subjects were implanted with Ferrara Rings. Regarding the visual outcome, a statistically significant improvement in uncorrected visual acuity (UCVA) was observed following implantation of the Ferrara cornea rings (p<0.001). Similarly, the K max values also demonstrated a decreasing trend from 52.88 ± 4.80 preoperatively to 50.42 ± 4.61 postoperatively (p<0.001). Hence, it was documented that a reduction in Kmax values indicates a significant flattening in corneal regularity and topographic stability after Ferrara segment implantation. Conclusions: The results of this observational study showed a significant improvement in visual acuity and a reduction in K max values due to the spacer effects of ICRS, resulting in an overall improvement in the quality of life of Keratoconus patients.