Structural and functional assessment of macula in patients with high-risk proliferative diabetic retinopathy submitted to panretinal photocoagulation and associated intravitreal bevacizumab injections: a comparative, randomised, controlled trial

Ophthalmologica. 2013;230(1):1-8. doi: 10.1159/000348605. Epub 2013 May 14.


Purpose: To compare the efficacy of therapy with panretinal photocoagulation (PRP) and intravitreal bevacizumab (IVB) injections versus PRP alone in patients with high-risk proliferative diabetic retinopathy (HR-PDR) with a 6-month follow-up.

Methods: Forty-two patients with HR-PDR were prospectively studied in a randomised, masked, controlled trial. Both eyes of each patient were randomised either to the study group (SG) receiving PRP plus IVB injections or the control group (CG) receiving PRP alone. Mean change in visual acuity (VA), optical coherence tomography-measured foveal thickness (FT) and macular volume (MV) were compared.

Results: Intergroup comparisons showed no significant difference in VA while FT exhibited a significant (p < 0.05) difference at 1 month of follow-up and MV was significantly reduced at the 1- and 3-month follow-up. Compared to baseline, VA was significantly worse at all follow-ups in the CG and was stable in the SG. FT increased significantly in the CG from baseline to the 1- and 6-month follow-ups and in the SG, no significant difference was observed. MV was significantly increased in the CG during all follow-up periods.

Conclusion: In HR-PDR, using IVB injections as adjuvant treatment to PRP reduces the VA deterioration and results in decreased FT and MV measurements compared to PRP alone.

Publication types

  • Comparative Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Angiogenesis Inhibitors / administration & dosage*
  • Antibodies, Monoclonal, Humanized / administration & dosage*
  • Bevacizumab
  • Combined Modality Therapy
  • Diabetic Retinopathy / drug therapy*
  • Diabetic Retinopathy / pathology
  • Diabetic Retinopathy / surgery*
  • Female
  • Follow-Up Studies
  • Humans
  • Intravitreal Injections
  • Light Coagulation / methods*
  • Macula Lutea / drug effects*
  • Macula Lutea / pathology
  • Male
  • Middle Aged
  • Prospective Studies
  • Risk Assessment
  • Tomography, Optical Coherence
  • Treatment Outcome
  • Visual Acuity


  • Angiogenesis Inhibitors
  • Antibodies, Monoclonal, Humanized
  • Bevacizumab