title: Worsening anatomic outcomes following aflibercept for neovascular age-related macular degeneration in eyes previously well controlled with ranibizumab.
abstract: OBJECTIVE
  Antivascular endothelial growth factor injection is the mainstay of treating neovascular age-related macular degeneration (AMD). Previous studies have shown that switching treatment from ranibizumab to aflibercept led to an improvement in eyes with recalcitrant activity. Herein, we identify a unique subset of patients whose eyes with neovascular AMD were previously well controlled with ranibizumab injections were then worsened after being switched to aflibercept.
  
  
  METHODS
  This is a retrospective interventional case series. Eyes with neovascular AMD, previously well controlled with monthly injections of ranibizumab, which then developed worsening of subretinal fluid after being switched to aflibercept were included.
  
  
  RESULTS
  A total of 17 eyes were included. All eyes developed increased subretinal fluid when switched from ranibizumab to aflibercept. Fourteen patients were switched back to ranibizumab after a single injection of aflibercept and had subsequent rapid resolution of subretinal fluid. Three patients continued with monthly aflibercept injections for two subsequent months and demonstrated the persistence of the increased subretinal fluid until they were switched back to treatment with ranibizumab at which time the fluid resolved. No eye had persistent decline in visual acuity.
  
  
  CONCLUSIONS
  Switching from intravitreal ranibizumab to aflibercept in eyes with well-controlled neovascular AMD may result in worsening in a subset of patients and resolves when therapy is switched back to ranibizumab.
authors.affiliation: Department of Ophthalmology, Shiley Eye Center, University of California, San Diego, La Jolla, CA, USA.
authors.forename: Eric
authors.initials: E
authors.lastname: Nudleman
authors.affiliation: Beaumont Eye Institute, Oakland University William Beaumont School of Medicine, Ann Arbor, MI, USA; Associated Retinal Consultants, Royal Oak, Ann Arbor, MI, USA.
authors.forename: Jeremy D
authors.initials: JD
authors.lastname: Wolfe
authors.affiliation: Kellogg Eye Center, University of Michigan Medical School, Ann Arbor, MI, USA.
authors.forename: Maria A
authors.initials: MA
authors.lastname: Woodward
authors.affiliation: Beaumont Eye Institute, Oakland University William Beaumont School of Medicine, Ann Arbor, MI, USA; Associated Retinal Consultants, Royal Oak, Ann Arbor, MI, USA.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Yonekawa
authors.affiliation: Beaumont Eye Institute, Oakland University William Beaumont School of Medicine, Ann Arbor, MI, USA; Associated Retinal Consultants, Royal Oak, Ann Arbor, MI, USA.
authors.forename: George A
authors.initials: GA
authors.lastname: Williams
authors.affiliation: Beaumont Eye Institute, Oakland University William Beaumont School of Medicine, Ann Arbor, MI, USA; Associated Retinal Consultants, Royal Oak, Ann Arbor, MI, USA.
authors.forename: Tarek S
authors.initials: TS
authors.lastname: Hassan
keywords: anti-VEGF; intravitreal injection; macula; optical coherence tomography; retina