Improvement of Diabetic Macular Edema in the Fellow Eye After Monocular Intravitreal Bevacizumab Injection

Introduction: Because of bilateral involvement in many cases with diabetic macular edema, Intravitreal bevacizumab injection perform in both eyes. There are some reports of therapeutic effects in the fellow eye after monocular injection of anti-vascular endothelial growth factors. In this study we describe a case of bilateral improvement of diabetic macular edema following unilateral intravitreal bevacizumab injection. Case Presentation: We report a patient with bilateral non-proliferative diabetic retinopathy and diabetic macular edema. Central macular thickness was 398µ in the right eye and 337µ in the left eye. Two months after intravitreal injection of 1.25mg bevacizumab in the right eye, significant improvement of diabetic macular edema was happened in both eyes including the left eye without intravitral injection. Central macular thickness was 245µ in the right eye and 250µ in the left eye. Conclusion: Unilateral injection of intravitreal bevacizumab may have therapeutic effects in the fellow untreated eye. Therefore; unilateral injection in bilateral cases may reduce the costs and complications of bilateral injection.