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.

Key Inclusion Criteria for Participants with nAMD:

1. ≥50 years of age

2. History of choroidal neovascularization (CNV) lesions secondary to nAMD in the eye study, requiring continued anti-VEGF treatment, as determined by the investigator.

   Key Inclusion Criteria for Participants with DME:

3. ≥18 years of age

4. History of DME with central involvement (in the central subfield on Spectral domain optical coherence tomography [SD-OCT]) in the study eye, requiring continued anti-VEGF treatment, as determined by the investigator

   Key Inclusion for All Participants:

5. Previously treated with ≥3 anti-VEGF IVT injections in the study eye in the 5 months (~150 days) prior to visit 1

Key Exclusion Criteria for Participants with nAMD:

1. Evidence of CNV due to any cause other than nAMD in either eye

   Key Exclusion Criteria for Participants with DME:

2. Evidence of macular edema due to any other cause other than diabetes mellitus in the study eye

3. Active proliferative diabetic retinopathy (DR) in the study eye

NOTE: Other protocol defined inclusion / exclusion criteria apply.

All Individual Patient Data (IPD) that underlie publicly available results will be considered for sharing.

When Regeneron has:

• received marketing authorization from major health authorities (e.g., FDA, European Medicines Agency (EMA), Pharmaceuticals and Medical Devices Agency (PMDA), etc.) for the product and indication or has globally discontinued developed of the product for all indications on or after April 2020 and has no plans for future development
• made results publicly available (e.g., scientific publication, scientific conference, clinical trial registry)
• the legal authority to share the data, and
• ensured the ability to protect participant privacy.

Qualified researchers can submit a proposal for access to individual patient or aggregate level data from a Regeneron-sponsored clinical trial through Vivli. Regeneron's Independent Research Request Evaluation Criteria can be found at: https://www.regeneron.com/sites/default/files/Regeneron-External-Data-Sharing-Policy-and-Independent-Research-Request-Evaluation-Criteria.pdf