Long-term Outcome of Intravitreal Aflibercept Treatment for Neovascular Age-Related Macular Degeneration Using a 'Treat-and-Extend' Regimen

To report outcomes in patients with neovascular age-related macular degeneration (nAMD) after treatment with aflibercept for up to 4 years using a treat-and-extend (TE) regimen.Observational study.Patients with newly diagnosed nAMD treated with aflibercept in a TE protocol.Subjects received 3 injections of aflibercept at monthly intervals followed by a TE protocol for at least 12 months. At each clinical visit after the loading phase, OCT and best-corrected visual acuity (BCVA) testing were performed to monitor disease activity.Change in BCVA over time, number of injections and visits per year, and percentage of patients reaching a treatment interval of ≥12 weeks.Of 231 consecutive eyes (231 patients) with a mean follow-up time of 2.9 (1-5.5) years, 173 were followed up for ≥2 years, 112 were followed up for ≥3 years, and 62 were followed up for ≥4 years. Mean BCVA increased from 59.8 letters (20/60) at diagnosis to 65.8 letters (20/50) after the loading phase (+6.0 letters; standard deviation [SD], 11.1) and to 65.5 letters at 12 months (+5.7 letters; [SD], 17). After 4 years of treatment, mean BCVA was maintained insignificantly better than baseline (63.4 letters, +3.6 letters gain, SD, 20.6; P 0.05). To achieve this, a mean of 7.7 (±1.2) injections and 4.4 (±1.6) clinic visits in the first year and 4.4 (±1.9) injections and 4.3 (±1.3) clinical visits per year thereafter were required. By 2 years of follow-up, 46.9% of patients reached a treatment interval of ≥12 weeks.By using a TE regimen, patients with nAMD maintained stable visual function over 4 years in a real-world setting with a reasonable treatment burden.