Comparing SCT510A and Ranibizumab for treating wet age-related macular degeneration

Inclusion Criteria:

1. Signed informed consent form;
2. Age≥45 years，male or femal;
3. The study eye must meet the following criteria： Diagnosis of wAMD； Primary or recurrent active subfoveal or parafoveal choroidal neovascularization (CNV) lesions secondary to wAMD； The total lesion area ≤ 30mm2； The BCVA letters between 19 and 73, inclusive, in the study eye, using Early Treatment Diabetic Retinopathy Study (ETDRS) charts；
4. The study eye has not received any anti-VEGF treatment within 3 months before randomization, such as ranibizumab, bevacizumab, conbercept, etc；

Exclusion Criteria:

1. Macular-related retinal pigment epithelial tears in the study eye; scar, fibrosis, atrophy or dense subfoveal exudation involving the fovea in the study eye;
2. Significant afferent pupillary defect (APD) in the study eye；
3. Aphakia (except intraocular lens) or posterior capsular rupture of the lens (except yttrium aluminium-garnet (YAG) laser posterior capsulotomy after intraocular lens implantation ≥1 month before randomization) in the study eye.
4. The study eye has any eye diseases or medical history other than nAMD that may affect central vision and/or macular examine (diabetic retinopathy, retinal vein occlusion, retinal detachment, macular hole, macular epiretinal membrane, vitreous macular traction syndrome, optic nerve disease, etc.);
5. CNV caused by non-nAMD exists in the study eye (such as trauma, ocular histoplasmosis, vascular stripes, etc.);
6. The study eye has high myopia with diopter≥8D;
7. The study eye has poorly controlled glaucoma (defined as intraocular pressure≥25 mmHg after anti-glaucoma treatment), or has received glaucoma filtering surgery;
8. Vitreous hemorrhage in the study eye before randomization;
9. Any history of the following ophthalmic surgery in the study eye: vitrectomy, macular transposition; any evidence of external eye surgery within 1 month, cataract surgery within 2 months or other intraocular surgery within 3 months before randomization in the study eye;
10. Active inflammation or infection in either eye, such as conjunctivitis,keratitis, scleritis, or endophthalmitis, ect；
11. Previous IVT injection of any anti-VEGF drug into fellow eye within 3 months before randomization;
12. Fellow eye uses ETDRS testing to detect BCVA \<19 letters;
13. Known allergy to any component of the study intervention or history of allergy to fluorescein or indocyanine green, any anesthetics or antimicrobial agents used during the course of the study;
14. Abnormal liver and kidney function (ALT, AST≥2.5 times the upper limit of normal; total bilirubin≥1.5 times the upper limit of normal; serum creatinine≥1.5 times the upper limit of normal);Abnormal coagulation function（prothrombin time ≥ 3 seconds over ULN, activated partial thromboplastin time ≥ 10 seconds over ULN）;
15. Poorly-controlled blood pressure (defined as: after receiving antihypertensive drugs, the subject's systolic value ≥160 mmHg or diastolic value ≥100 mmHg at seat);
16. History of a medical condition, including myocardial infarction, unstable angina pectoris, cerebrovascular accidents (including TIA), other thromboembolic diseases (such as thromboembolic angiitis, pulmonary embolism, deep vein thrombosis, portal vein thrombosis, etc.) within 6 months before randomization;
17. Any history of surgery within 1 month before randomization, and/or any currently unhealed wounds, ulcers, fractures, etc.;
18. Evidence of significant uncontrolled concomitant diseases such as cardiovascular diseases, nervous system diseases, respiratory system diseases, urinary system diseases, digestive system diseases and endocrine diseases before randomization; uncontrolled diabetes (defined as HbA1c\>10.0%);current treatment for active systemic infection;
19. Participated in any drug (other than vitamins and minerals) or device clinical trials within 3 months or the duration of 5 half-lives of the study drug (which is longer) before randomization and have used the test drug or received device treatment.
20. Pregnant, lactating women and the patients who can not take contraceptive measures.