 Through these changes, the investigators know the course of a diabetic retinopathy and it is known that the generation rate of microaneurysm is associated with the clinically significant progression of macular edema CSME in mild-to-moderate nonproliferative diabetic retinopathy .10,11 In addition, the number of microanerysm is an important prognostic indicator which can estimate the progression or regression of diabetic retinopathy, as predicting whether becoming better or worse in diabetic retinopathy.12 Kohner and Sleightholm13 describe this concept at first time in 1986, its association with the number of microvascular flow and the severity of diabetic retinopathy. In recent years it is reported that measuring the number of microaneurysm and the turnover rate associated with the appearance or disappearance of microaneurysm, are predictors in progression of diabetic retinopathy and macular edema.14 To delay the progression of diabetic retinopathy and to improve macular edema, the laser photocoagulation have been the important role.15 Although the laser photocoagulation have had treatment effect in the diabetic retinopathy by reducing the amount of VEGF in micraneurysm and by degenerating the neovascularization after laser therapy, there was a problem that has many limitations - peripheral visual field defects, night blindness, progression of macular edema etc., and that the disease does not cured in a good time because of limits of laser therapy due to cataract, vitreous hemorrhage and turbidity. As an alternative method to solve these limitations, there is an anti-VEGF therapy.6 According to a previous study result, intraocular injection of Bevacizumab inhibits occurring of neovascularization by blocking the VEGF receptor .17 Recently, several studies have been reported that when injected intravitreal anti-VEGF, macular edema is improved and neovascularization is inhibited, by reducing the leakage of neovascularization.3 Especially, Leicht SF et al18 reported the number of microaneurysms and turnover rate in NPDRnon-proliferative diabetic retinopathy patients injected with Ranibizumab. And the result showed entire number of the microaneurysms and turnover rate are decreased, which could be mean the regression of diabetic retinopathy and it could decide the therapeutic effect. 