Vitrectomy for diabetic macular edema: the role of posterior vitreous detachment and epimacular membrane
Section snippets
Patients and methods
This was a retrospective study of the effect of vitrectomy on 30 eyes of 29 cases with diabetic macular edema with and without a posterior vitreous detachment combined with or without an epimacular membrane. Pars plana vitrectomy was performed at Toho University Sakura Hospital between October 1998 and February 2000 for the treatment of the macular edema.
The clinical characteristics of the 29 patients are listed in Table 1. The patients included 19 men and 10 women whose ages ranged from 49 to
Case reports
The following two cases illustrate the clinical course of macular edema preoperatively and postoperatively.
Discussion
The results of this study have demonstrated that vitrectomy is effective in reducing diabetic macular edema, and the outcome does not depend on the presence or absence of a posterior vitreous detachment or an epimacular membrane. The mechanisms to reduce diabetic macular edema with vitrectomy are not clear after the evidences of this study. Lewis and associates3 suggested that posterior hyaloidal traction might cause a shallow macular detachment and that vitrectomy reduces the traction exerted
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