RESUMO
OBJECTIVE: To assess outcomes in treatment-naive eyes with neovascular age-related macular degeneration (nAMD) and good baseline visual acuity (VA) treated using a treat-and-extend (T&E) regimen with intravitreal aflibercept, ranibizumab, or bevacizumab. DESIGN: Single center, retrospective, observational case series. PARTICIPANTS: Ninety-one patients (93 eyes) with nAMD and baseline VA ≥20/60 followed for ≥1 year after the first intravitreal injection. Minimum of 6 (first year) and 3 (subsequent years) and maximum of 12 injections per 12 calendar months. INTERVENTION: Intravitreal aflibercept 2.0 mg, ranibizumab 0.5 mg, or bevacizumab 1.25 mg. Three monthly injections. Treatment interval extended in 2-week increments after resolution of macular edema and reduced in 2-week increments if edema recurred; maximum interval of 12 weeks. Medication changed if edema recurred during and persisted after three monthly injections of original agent. MAIN OUTCOME MEASURES: VA maintenance over time. Total number of injections received by year of treatment. RESULTS: Ninety-three eyes were analyzed. Pretreatment VA was 20/20-20/25 (N=16), 20/30-20/40 (N=47), and 20/50-20/60 (N=30). Mean follow-up was 3.2 years. Follow-up by year was 93, 73, 65, 44, and 26 eyes for years 1-5, respectively. Mean number of injections during years 1-5 was 7.9, 5.9, 5.6, 5.9, and 6.0, respectively; mode number of injections was 7, 5, 3, 6, and 4, respectively. For years 1-5, percent of all eyes at or above baseline was 70%, 66%, 65%, 59%, and 58%, respectively; percent ≥20/60 was 86%, 88%, 86%, 84%, and 77% for years 1-5. For eyes with baseline VA ≥20/40, percent of eyes at or above baseline was 83%, 82%, 81%, 68% and 76% for years 1-5, respectively. CONCLUSION: Using a T&E intravitreal injection protocol, more than 75% of treatment-naive eyes with nAMD and baseline VA ≥20/60 can maintain VA ≥20/60 over 5 years.
RESUMO
Neovascular age-related macular degeneration is a leading cause of vision loss among the aging population. The current standard of care to treat neovascular age-related macular degeneration is inhibiting vascular endothelial growth factor (VEGF) through intravitreal injections. Recent studies have demonstrated that the tyrosine kinase with immunoglobulin-like and epidermal growth factor-like domains 2 (Tie2) pathway also plays a critical role in angiogenesis and vascular stability. Additionally, newly developed treatment delivery systems have been designed to greatly reduce the frequency of injections. In targeting the Tie2 pathway and utilizing a sustained release delivery system, patients may experience improved visual outcomes and a reduced burden of treatment.
