Pars plana vitrectomy for the management of sever diabetic retinopathy.

In 100 severely diseased diabetic eyes we performed pars plana vitrectomy. After a median follow-up time of seven months, major visual improvement was achieved in 49% of the eyes. An additional four eyes maintained a preoperatively good visual acuity resulting in an overall success rate of 53%. Eyes with only vitreous hemorrhages did better (71%) than eyes with posterior retinal detachments (31%). We did not observe new tissue proliferation in any of the operated eyes.