Clinical analysis of non-traumatic vitreous hemorrhage

Objective To investigate the main cause and the clinical outcome of non-traumatic vitreous hemorrhage.Methods The clinical data of 166 cases of non-traumatic vitreous hemorrhage were followed up and analyzed between July 2008 and June 2011 for the main cause and the surgical effects which were carried with vitrectomy.Results Of the all causes,proliferative diabetic retinopathy was the principal cause (111eyes,57.83％ ),the second one was retinal vein occlusion (25 eyes,15.06％ ),and the third one was Eales' s disease ( 12 eyes,12.69％ ).The best corrected visual acuity were all improved to a certain degree.Conclusions Proliferative diabetic retinopathy (PDR),retinal vein occlusion and Eales' s disease are frequent causes of non-traumatic vitreous hemorrhage.Vitrectomy is an effective way for treating them.Retinal photocoagulation in early stage is helpful. Key words: Vitreous hemorrhage ;  Diabetic retinopathy;  retinal vein occlusion ;  Eales' s disease