Effectiveness of intravitreal ranibizumab in exudative age-related macular degeneration (AMD): comparison between typical neovascular AMD and polypoidal choroidal vasculopathy over a 1 year follow-up

BMC Ophthalmol. 2013 Apr 4;13:10. doi: 10.1186/1471-2415-13-10.


Background: The effects of intravitreal ranibizumab (IVR) against exudative age-related macular degeneration (AMD) may be different associated with the lesion phenotype. This study was conducted to compare the outcomes of IVR between two different phenotypes of exudative AMD: typical neovascular AMD (tAMD) and polypoidal choroidal vasculopathy (PCV).

Methods: This is a retrospective cohort study of 54 eyes from 54 subfoveal exudative AMD patients (tAMD 24, PCV 30 eyes). Three consecutive IVR treatments (0.5 mg) were performed every month, followed by re-injections as needed. Change in the best-corrected visual acuity (BCVA) and central retinal thickness (CRT) were then compared between the tAMD and PCV groups over 12 months of follow-up.

Results: The mean BCVA was significantly improved (-0.11 logMAR units) at month 3 after the initial IVR (p <0 .001, Wilcoxon signed-rank test), and was sustained up to 12 months in all AMD patients (p =0.02). In the subgroup analysis, the tAMD group showed a significant improvement in their mean BCVA (-0.06, -0.17, -0.15 and -0.16 logMAR units at 1, 3, 6 and 12 months, respectively), but there was only a slight but non-significant improvement in the PCV group. The improvement in the BCVA was significantly greater in the tAMD group than in the PCV group (p = 0.043, repeated measures ANOVA) over 12 months. Both phenotypes showed significant improvements in the CRT during 12 months after the initial IVR.

Conclusions: IVR is an effective therapy for tAMD and PCV in the BCVA improvement in Japanese patients over 12 months of follow-up. The phenotype of tAMD showed a significantly better outcome with IVR than PCV in terms of BCVA improvement.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Angiogenesis Inhibitors / administration & dosage*
  • Antibodies, Monoclonal, Humanized / administration & dosage*
  • Choroid Diseases / drug therapy*
  • Choroid Diseases / pathology
  • Choroid Diseases / physiopathology
  • Female
  • Follow-Up Studies
  • Humans
  • Intravitreal Injections
  • Logistic Models
  • Macular Degeneration / drug therapy*
  • Macular Degeneration / pathology
  • Macular Degeneration / physiopathology
  • Male
  • Middle Aged
  • Polyps / drug therapy*
  • Ranibizumab
  • Retrospective Studies
  • Visual Acuity


  • Angiogenesis Inhibitors
  • Antibodies, Monoclonal, Humanized
  • Ranibizumab