Purpose: To evaluate the long-term results of Ferrara rings intracorneal ring segments for the treatment of keratoconus. Setting: Private medical center, Ophthalmology Department, Hadassah Optimal Medical Center, Haifa, Israel. The National Center for the Treatment of Keratoconus Haifa, Israel. Materials and methods: Retrospective review of data for patients implanted with Ferrara intrastromal ...