Evaluation of keratoconus progression and visual improvement after intrastromal corneal ring segments implantation: A retrospective study.

Objective: To investigate the role of ICRS in halting keratoconus progression in a large sample of patients.

Methods: A retrospective, non-comparative, interventional study based on the review of medical records of patients diagnosed with keratoconus who underwent Ferrara corneal ring segment implantation. A retrospective chart analysis study of 123 operated eyes with follow-up ranging from 3 to 16 years (mean 5.