Figure 4. Example of scotopic electroretinogram (ERG) in groups before bevacizumab (A), anti-rat vascular endothelial growth factor (VEGF) antibody (B), rat immunoglobulin G (IgG; C), and physiologic saline (D) injection, and 7 days after intravitreal injection of 5 µl of 3.75 mg/ml bevacizumab (E), 15 µg/ml anti-rat VEGF antibody (F), 1 mg/ml rat IgG (G), or physiologic saline (H). No significant difference in b-wave amplitude was observed between bevacizumab, anti-rat VEGF antibody, rat IgG, and physiologic saline injection groups.