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

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.

Inclusion criteria:

1. Patient who are diagnosed as retinopathy of prematurity using clinical fundus screening;
2. Patients at the initial stage of treatment whose one eye at least has the following condition: Stage 1+, Stage 2+, Stage 3, Stage 3+ in Zone 1; or Stage 2+, Stage 3+ in Zone 2; or those with AP-ROP according to the international ROP classification,;
3. Patient for whom the first treatment is laser therapy, intravitreal injection of Conbercept or ranibizumab;

Exclusion criteria:

1. Patients with neurological diseases that seriously affect visual function;
2. Patient or his mother (during pregnancy) has received intravitreal or systemic anti-VEGF drug therapy for other diseases;

Elimination criteria:

1. Patients with insufficient data on treatment or medication;
2. Patients who are followed up for less than 3 months after treatment.