Ranibizumab in Diabetic Vitrectomy. A Prospective, Randomised Controlled Trial of Ranibizumab Pre-treatment in Diabetic Vitrectomy - a Pilot Study

This study will evaluate the effect of ranibizumab on patients undergoing vitrectomy surgery for the complications of diabetic retinopathy. Vitrectomy surgery can be difficult and bleeding after the operation can reduce vision for patients. Our hypothesis is that injection into the eye of ranibizumab one week before surgery will make the surgery easier, reduce complications and improve outcome. In this trial, patients will be randomly allocated to receive either ranibizumab injection or a placebo injection of saline. Neither the patient, their surgeon, nor the study investigators will know which they have received so that a fair comparison can be made.