Aims: To study the histopathological, biochemical and functional effects of intravitreal bevacizumab on the rat eye, with special emphasis on its immediate pro-inflammatory features eventually associated with cellular oxidative burden. Methods: Histopathological evaluation was performed 24 h, 1 and 4 weeks after bevacizumab (75 μg/rat eye) or saline intravitreal injection, as well as biochemical analysis of oxidative stress-related markers and electroretinograms. Results: Bevacizumab induces a transient inflammatory reaction together with a modification of the b-wave amplitude and latency of the electroretinogram. No changes were observed in any of the oxidative stress markers studied at any time after injection. Conclusion: Intravitreal bevacizumab injection per se generates an immediate, transient and mild inflammation of the rat eye, which is not associated with oxidative stress in ocular tissues.