Visual and corneal biomechanical changes after femtosecond laser-assisted intracorneal ring segment implantation in patients with keratoconus

Purpose The aim of this study was to evaluate the effect of femtosecond laser-assisted intrastromal corneal ring segment (ICRS) implantation in patients with keratoconus on the visual outcome and corneal biomechanics using CORVIS ST. Patients and methods This is a prospective interventional study that was carried out on 30 keratoconic eyes which underwent femtosecond laser-assisted ICRS implantation. All the included eyes were assessed before ICRS implantation for uncorrected/best-corrected visual acuity, Pentacam and Corvis ST imaging. They were assessed again at 1 and 3 months after the implantation for the same parameters. Results The mean age of the studied group was 24.00±3.80 years. The uncorrected corrected visual acuity improved significantly at the first (0.36±0.04, P