Femtosecond assisted intracorneal segments implantation for mild to moderate keratoconus: long term results

Purpose To describe the 2 year results of femtosecond assisted intracorneal segments implantation for the treatment of mild to moderate keratoconus with the use of a femtosecond laser. Methods Prospective case series including 4 eyes of 4 consecutive patients with keratoconus. Patients where implanted with KC Solutions intrastromal segments (IS). Patients’ assessment included visual acuity measurement, manifest refraction, clinical examination and corneal topography and tomography. IS implantation was scheduled in patients with unsatisfying corrected visual acuity (CDVA) and contact lens intolerance. Planning of the operation was done based on the topography and refraction based on nomogram provided by the IS manufacturer. IS were implanted in intracorneal pocket created with the FS200 femtosecond laser. Comparisons were made between pre‐ to postoperative values with the Wilcoxon signed‐rank test. Results Preoperative average steep keratometry was 48.45D (range 45.6 to 51.6), whereas at 2 years postoperatively it was 46.73 (44.8 to 48.7), (p