Objective:To explore the operational opportunity and methods for proliferative diabetic retinopathy(PDR) among type 2 diabetes mellitus patients.Methods:Three groups of PDR in 93 patients(143 eyes) with type 2 diabetes were analyzed retrospectively:eyes with only vitreous hemorrhage(52 eyes

33 patients)

vitreous hemorrhage +fibrovascular membranes(71 eyes

47 patients)and vitreous hemorrhage + traction retinal detachment(20 eyes

13 patients)were diagnosed as Mild PDR

Moderate PDR and Severe PDR respectively.Four mg triamcinolone acetonide(TA) was injected into the vitreous cavity before and in the vitrectomy.In the operations

phacoemulsification(phaco)

phaco+intraocular lens(IOL)

partial photocoagulation and panretinal endophotocoagulation were combined according to situation.Perfluorohexane or perfluoropropane gases and silicone oil were used as intraocularfilling material dependent on the individual’s clinical situation.Visual acuity after operation

hemorrhage in operation and one month after operation

inflammation response in the anterior chamber

retinal conditions and intraocular pressure were observed.Examination of retina and macular

fluorescein angiography(FFA) and optical coherence tomography(OCT) were performed three months after operation.Results:(1)The visual acuity of patients with mild PDR increased much more than severe PDR ones.(2)No obvious hemorrhage happened in and after operation in mild PDR eyes.Hemorrhage happened in operation in three moderate PDR eyes

in 2 severe PDR eyes in operation

and in 3 severe ones after operation.(3)Intraocular pressure increased temporarily in some of the three group eyes

including 10 eyes with mild PDR

12 with the moderate PDR and 3 with the severe PDR.The increase of intraocular pressure happened especially in the combined operations of phaco/ endophotocoagulation.Conclusion:Vitrectomy in the mild PDR eyes

intravitreal injection of TA before and in the operation contribute to the prognosis of PDR.