Mohammadpour M, et al. - Researchers conducted this historical cohort study to assess the long-term (5 years) results of 360 degrees intracorneal ring (ICR) implantation with and without corneal crosslinking (CXL) in patients with progressive keratoconus (KCN). This investigation was performed on 35 eyes with progressive KCN, which was randomly divided into 2 groups. Data reported that the mean improvement of CDVA in patients with ICR implantation with and without CXL was 0.56 ± 0.67 and 0.33 ± 0.61, respectively. Although the KCN progression with acceptable visual, topographic, and biomechanical outcomes could be stopped by ICR implantation alone, the combination of ICR and CXL has an adjuvant and synergistic effect, particularly in the long-term follow-up.