Overview Safety and Effectiveness Study of the VEGA UV-A System for Cross-linking in Eyes With Keratoconus and Ectasia Status: Terminated Trial end date: 2012-07-01 Target enrollment: Participant gender: Summary The purpose of this research study is to evaluate the long tern safety and effectiveness of cross-linking in eyes with keratoconus and ectasia. Phase: Phase 3 Details Lead Sponsor: Topcon Medical Systems, Inc.Treatments: Riboflavin