Inclusion Criteria:  Newly-diagnosed primary vitreoretinal lymphoma ECOG≤2 creatinine clearance rate (CCR) ≥ 60ml/h, according to Cockcroft-Gault Total bilirubin # 2 upper limits of normal, alanine aminotransferase#ALT# < 3 upper limits of normal Sign the Informed consent Women of childbearing potential must understand that the study medication could have a potential teratogenic risk. They should undergo complete contraception during the study period. Male subjects must agree to use condoms throughout study drug therapy.  Exclusion Criteria:  primary central nervous system lymphoma involved eyes and brain systemic B cell lymphoma involved eyes Pre-existing uncontrolled active infection Clinical evidence of grade 3 or 4 heart failure as defined by the New York Heart Association criteria Pregnancy or active lactation Co-existing tumors HIV or HBV or HCV