title: Macular edema formation and deterioration of retinal function after intravitreal bevacizumab injection for proliferative diabetic retinopathy.
abstract: OBJECTIVE
  To report a case of proliferative diabetic retinopathy (PDR) showing transient macular edema (ME) and deteriorated retinal function after intravitreal bevacizumab injection (IVB).
  
  
  RESULTS
  A 53-year-old man received IVB (1.25 mg/0.05 ml) in both eyes for the treatment of PDR. There was no treatment-related complication. However, he complained of photopsia in both eyes 6 h after the injection. Slit-lamp examination revealed mild cellular infiltrations (1+) in the anterior chamber in both eyes. Optical coherence tomography showed ME formation in the left eye. Both full-field and multifocal electroretinography (ERG) revealed the deterioration of all parameters in both eyes compared with pretreatment. The inflammation in the anterior segment and ME disappeared 1 day after the injection. ERG parameters were improved 9 days after the injection, except for the N1 and P1 amplitude of multifocal ERG in the left eye.
  
  
  CONCLUSIONS
  We propose that patients who undergo IVB should be carefully informed and followed up for possible complications including temporal ME formation and retinal function deterioration.
authors: Division of Ophthalmology, Department of Organ Therapeutics, Kobe University Graduate School of Medicine, Kobe Kaisei Hospital, Kobe, Japan.
authors: Hisanori
authors: H
authors: Imai
authors: Shigeru
authors: S
authors: Honda
authors: Yasutomo
authors: Y
authors: Tsukahara
authors: Akira
authors: A
authors: Negi