This study is researching aflibercept high dose (HD), referred to as "study drug", with an experimental dosing regimen. The study is focused on participants with nAMD and DME that have been previously treated with anti-vascular endothelial growth factor (anti-VEGF) medications. The aim of the study is to see how safe and effective aflibercept HD injections are when given as frequently as every 4 weeks. The study is also looking at what side effects may happen from taking the study drug.