on behalf of the HAWK and HARRIER Study Investigators* Purpose: Two similarly designed phase 3 trials (HAWK and HARRIER) compared brolucizumab, a singlechain antibody fragment that inhibits vascular endothelial growth factor-A, with aflibercept to treat neovascular age-related macular degeneration (nAMD).Design: Double-masked, multicenter, active-controlled, randomized trials. Participants: Patients (N ¼ 1817) with untreated, active choroidal neovascularization due to age-related macular degeneration in the study eye.Intervention: Patients were randomized to intravitreal brolucizumab 3 mg (HAWK only) or 6 mg or aflibercept 2 mg. After loading with 3 monthly injections, brolucizumab-treated eyes received an injection every 12 weeks (q12w) and were interval adjusted to every 8 weeks (q8w) if disease activity was present; aflibercept-treated eyes received q8w dosing.Main Outcome Measures: The primary hypothesis was noninferiority in mean best-corrected visual acuity (BCVA) change from baseline to Week 48 (margin: 4 letters). Other key end points included the percentage of patients who maintained q12w dosing through Week 48 and anatomic outcomes.Results: At Week 48, each brolucizumab arm demonstrated noninferiority to aflibercept in BCVA change from baseline (least squares [LS] mean, þ6.6 [6 mg] and þ6.1 [3 mg] letters with brolucizumab vs. þ6.8 letters with aflibercept [HAWK]; þ6.9 [brolucizumab 6 mg] vs. þ7.6 [aflibercept] letters [HARRIER]; P < 0.001 for each comparison). Greater than 50% of brolucizumab 6 mgetreated eyes were maintained on q12w dosing through Week 48 (56% [HAWK] and 51% [HARRIER]). At Week 16, after identical treatment exposure, fewer brolucizumab 6 mgetreated eyes had disease activity versus aflibercept in HAWK (24.0% vs. 34.5%; P ¼ 0.001) and HARRIER (22.7% vs. 32.2%; P ¼ 0.002). Greater central subfield thickness reductions from baseline to Week 48 were observed with brolucizumab 6 mg versus aflibercept in HAWK (LS mean À172.8 mm vs. À143.7 mm; P ¼ 0.001) and HARRIER (LS mean À193.8 mm vs. À143.9 mm; P < 0.001). Anatomic retinal fluid outcomes favored brolucizumab over aflibercept. Overall, adverse event rates were generally similar with brolucizumab and aflibercept.Conclusions: Brolucizumab was noninferior to aflibercept in visual function at Week 48, and >50% of brolucizumab 6 mgetreated eyes were maintained on q12w dosing interval through Week 48. Anatomic outcomes favored brolucizumab over aflibercept. Overall safety with brolucizumab was similar to aflibercept (Clin-icalTrials.gov; NCT02307682, NCT02434328).

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Ranibizumab ± laser therapy resulted in similar rates (∼40%) of suboptimal (<5-letter) and pronounced (≥10-letter) BCVA improvement at 12 weeks. Eyes with suboptimal early BCVA response showed poorer long-term visual outcomes than eyes with pronounced early response (mean improvement 3.0 vs 13.8 letters at 156 weeks).

Updated guidelines on IVT injection technique and monitoring are proposed based on a review of published literature and expert panel deliberations.

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