AIM:To observe the ocular hemodynamic changes in the eyes of patients with rhematigenous retinal detachment before and after the scleral encircling procedure with the encircling band shorten in a certain range. ·METHODS:Central retinal arteries (CRA)were studied with color Doppler imaging (CDI) in 28 patients with unilateral rhematogenous retinal detachment,the fellow eyes served as control.The measured parameters included peak systolic velocity(Vmax),end diastolic velocity(Vmin),mean velocity(V),resistance index(RI) and pulsatility index(PI). ·RESULTS:A comparison of the indexes of CRA in both the sick eyes before the operations and the eyes in the control group found the differences among them no statistical significance. The Vmax,Vmin,RI and PI of the CRA of the sick eyes all increased 14 days after the operations,but not reached statistical significant difference,and showed no statistical significance as compared with those in the control group. ·CONCLUSION:Scleral buckling procedure with the encircling band shorten in a certain range can not change blood flow in retinal tissue for a short time after surgery. Color Doppler imaging is a useful tool for the studies of ocular hemodynamics changes.