Real World Study of the Effectiveness and Safety of Conbercept Ophthalmic Injection in the Treatment of Retinopathy of Prematurity - Multicenter, Retrospective and Observational Study Based on Real World Data

This study is a retrospective, multi-center real world study. The real world data comes from the electronic medical record system and disease database of the research centers .The patient's demographic information, disease information, clinical treatment status, efficacy evaluation and adverse events and so on will be collected and evaluated by applicability of the data, generated an analysis data set. Use the causal inference method of statistical analysis to observe the effectiveness and safety of intravitreal injection of Conbercept, and explore the effectiveness and safety of different doses in the treatment of retinopathy of prematurity.