VEGFA and macular degeneration: Cluster 2 (Figure 6, green cluster): The second study clustering contained 28 high-frequency keywords such as ranibizumab, macular degeneration, choroidal neovascularization (CNV), VEGF, anti-VEGF, intravitreal bevacizumab, avastin, pegaptanib, etc. This section focuses on the mechanism by which the ranibizumab treatment of nAMD reduces VEGF levels and inhibits CNV.