Ibares Frías, LucíaFernández-Vega Cueto, LuisAlfonso Bartolozzi, BelénPoo López, AranzazuMadrid Costa, DavidAlfonso, José F.2023-06-222023-06-222022-12-210271-368310.1080/02713683.2022.2159983https://hdl.handle.net/20.500.14352/73175Received 24 October 2022; Accepted 13 December 2022Purpose: To evaluate the outcomes of implanting a 150° arc-length intrastromal corneal ring segment (ICRS) using a femtosecond laser in patients with post-LASIK ectasia throughout a 5-year follow-up period. Methods: This study enrolled 45 eyes of 45 patients diagnosed with post-LASIK ectasia who underwent a 150° arc-length Ferrara-type ICRS implantation. The uncorrected (UDVA) and corrected (CDVA) distance visual acuities, residual refractive errors, and root mean square (RMS) for coma-like aberration were evaluated preoperatively and at 6-, 12-, 36, and 60 months postoperatively. Results: Mean UDVA (logMAR) ameliorated from 0.53 ± 0.33 preoperatively to 0.26 ± 0.24 at 6 months postoperatively (p < 0.0001). Mean CDVA improved from 0.12 ± 0.13 to 0.04 ± 0.06 (p < 0.0001). Mean UDVA and CDVA remained stable throughout the 5-year follow-up (p > 0.1). No eyes lost lines of CDVA at any follow-up visit compared to preoperatively, and most eyes gained lines. The eyes with a refractive cylinder ≤ 2.00 D varied from 26.7% preoperatively to more than 75% at all postoperative follow-up visits. The maximum keratometry was significantly flattened (p < 0.0001), and the RMS for corneal coma-like aberration was halved (p < 0.0001). 93.3% of the eyes did not show signs of disease progression or regression of the visual or refractive outcomes at any follow-up visits.engjournal articlehttps://doi.org/10.1080/02713683.2022.2159983https://www.tandfonline.com/doi/full/10.1080/02713683.2022.2159983restricted access617.7-089.243681.73617.713ICRSIntrastromal corneal ring segmentectasiapost-LASIK ectasiaCirugíaOftalmologíaMateriales ópticos3213 Cirugía3201.09 Oftalmología2209.14 Propiedad ópticas de los sólidos