AIM:To investigate the effect of diclofenac sodium eye drops after YAG laser treatment.METHODS:A total of 63 cases(63 eyes) of after-cataract were randomly divided into experimental group(36 cases,36 eyes)and control group(27 cases,27 eyes),all the patients were excluded from the other eye diseases or diabetes.After YAG laser posterior capsulotomy,experimental group was treated with diclofenac sodium eye drops 3 to 4 times/day,control group without eye drops.7 days later changes of visual acuity and eye condition were observed.RESULTS:Visual acuity of experimental group improved in 28 cases,that of control group increased in 10 cases,accounting for 78% and 37%,there was a significant difference between the two groups(χ 2=10.38,P<0.01),1 month later visual acuity had no significant difference between the two groups.CONCLUSION:Application of diclofenac sodium eye drops after YAG laser posterior capsulotomy results in faster visual recovery,and fewer side effects in patients.