One-year results of a flexible regimen with ranibizumab therapy in macular degeneration: relationship with the number of injections

Retina. 2011 Jul-Aug;31(7):1261-7. doi: 10.1097/IAE.0b013e318207d152.


Purpose: To evaluate the efficacy and safety of a flexible regimen with intravitreal injections of ranibizumab in patients with naive choroidal neovascularization secondary to age-related macular degeneration and to determine whether the final outcome is related to the number of injections.

Methods: Prospective, noncomparative, consecutive case series study. We included 90 eyes of 88 patients that were initially treated with 3 consecutive monthly intravitreal injections of ranibizumab, and thereafter, follow-up visits were progressively spread out to a maximum of 8 weeks apart in the absence of visual acuity loss and signs of lesion activity. The primary end points were changes in visual acuity (Early Treatment Diabetic Retinopathy Study letters), foveal thickness measured by spectral-domain optical coherence tomography, and lesion size (LS) measured by fluorescein angiography.

Results: The median visual acuity improved from 53 letters at baseline to 60 letters at Month 1 (P < 0.0001), 63 letters at Month 3 (P < 0.0001), and 60 letters at Month 12 (P < 0.0001). A significant reduction was also observed in foveal thickness and LS (P < 0.0001). The mean number of injections was 4.4, and the mean number of visits was 8.0. Treatment consisted of 3 injections for 40% of patients, and 60% of patients received more than 3 injections. No significant association was observed between the visual acuity improvement and the number of injections. No relevant side effects were observed.

Conclusion: A flexible regimen with ranibizumab therapy is efficacious and safe in patients with neovascular age-related macular degeneration, reducing both the burden of injections and follow-up visits. The visual acuity improvement was independent of the number of injections.

MeSH terms

  • Aged
  • Aged, 80 and over
  • Antibodies, Monoclonal, Humanized / administration & dosage*
  • Antibodies, Monoclonal, Humanized / adverse effects
  • Choroidal Neovascularization / drug therapy*
  • Choroidal Neovascularization / physiopathology
  • Female
  • Follow-Up Studies
  • Humans
  • Intravitreal Injections
  • Macular Degeneration / drug therapy*
  • Macular Degeneration / physiopathology
  • Male
  • Middle Aged
  • Prospective Studies
  • Ranibizumab
  • Retreatment
  • Tomography, Optical Coherence
  • Treatment Outcome
  • Visual Acuity / physiology


  • Antibodies, Monoclonal, Humanized
  • Ranibizumab