Effect of Macugen(Pegaptanib)on Surgical Outcomes and VEGF Levels in Diabetic Patients With PDR (Diabetic Retinopathy or CSDME (Macular Edema)

Patients with proliferative diabetic retinopathy or clinically significant diabetic macular edema requiring surgical intervention will receive a pre-operative injection of Macugen. An initial, pre-injection vitreous tap will be done in order to provide baseline VRGF 165 and cytokine levels. At the onset of the vitrectomy, a second vitreous sample will be taken to obtain intra-operative levels of Macugen, VEGF 165 and cytokines.