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Six-month outcomes of switching from 2 to 8 mg aflibercept in eyes with neovascular age-related macular degeneration Ataru Fujimaki 1 , Tomohiro Niizawa 1 , Kazusa Saito 1 , Yuto Kawamata 1 , Takehito Iwase 1 , Takayuki Baba 1 1Department of Ophthalmology and Visual Science, Chiba University Graduate School of Medicine pp.1085-1091
Published Date 2026/9/15
DOI https://doi.org/10.11477/mf.037055790800091085
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Abstract Purpose:To evaluate the 6-month outcomes after switching from intravitreal aflibercept(IVA) 2 mg(IVA 2 mg) to 8 mg(IVA 8 mg) in patients with neovascular age-related macular degeneration(nAMD) who required ≤8-week treatment intervals under a treat-and-extend regimen.

Subjects and Methods:This retrospective study enrolled 44 eyes of 40 consecutive patients with nAMD receiving IVA 2 mg under a treat and extend regimen who were switched to IVA 8 mg at Chiba University Hospital between September 2024 and February 2025. Only patients with treatment intervals of ≤8 weeks at the time of switching were included. Best-corrected visual acuity, central retinal thickness(CRT), central choroidal thickness, treatment interval, and disease activity were assessed at baseline(BL), first visit after switch(Visit 1), and at 6 months(6M). The proportion of eyes with ≥2-week extensions between BL and 6M was also assessed.

Results:Thirty-six eyes of 32 patients completed the 6-month follow-up. Best-corrected visual acuity, CRT, and central choroidal thickness were maintained without significant changes throughout the study period. No significant difference in disease activity was observed at 6M. The mean treatment interval was significantly extended from 7.0±1.2 weeks at BL to 9.1±1.4 weeks at 6M(p<0.01);56% of the eyes achieved extensions of ≥2 weeks. The eyes with successful treatment extensions had thinner CRT and lower disease activity at the time of switching.

Conclusions:Switching to IVA 8 mg for eyes with nAMD requiring ≤8-week intervals under IVA 2 mg maintained functional and anatomical outcomes while enabling ≥2-week extensions in 56% of the patients.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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