Objective:to study the effect of vitrctomy combined with or without cataract extraction.Methods:There were 156 eyes.Team A 86 eyes were operated complicated with cataract extraction(phacoemulsificotion).52 eyes keep post-capsule

34 eyes don’t keep post-capsule.Team B 70 eyes simply with vitrectomy.The complications and the incidence of cataract after vitrectomy were observed.Results:The complications were no differents between the two team.The incidence of cataract tampond with C3F8 was 49.03%.The incidence of cataract in patients which tampond with silicone oil was 55.10%.Conclusions:Vitrectomy combined with cataract extraction is effective and safety.Vitrectomy combined can decrease the need of operation in short time.