Overview Rainbow Extension Study Status: Active, not recruiting Trial end date: 2022-05-18 Target enrollment: Participant gender: Summary The purpose of this study is to evaluate the long term efficacy and safety of intravitreal ranibizumab compared with laser ablation therapy in patients who were treated for retinopathy of prematurity (ROP) in the core study CRFB002H2301 Phase: Phase 3 Details Lead Sponsor: Novartis PharmaceuticalsTreatments: Ranibizumab