·AIM:To evaluate a retinal visual acuity meter(retino-meter)in predicting the value of visual acuity after cataract surgery.·METHODS:Ninety-three patients(106 eyes)with various types of cataract were randomly selected,preoperative visual acuity tested by LAMBDA 100 retinometer in patients was compared with postoperative 3 months corrected visual acuity.·RESULTS:Of 106 eyes,12(11.3%)had equal preo-perative predicted and postoperative visual acuity,69(65.1%)had better visual acuity than predicted visual acuity(false-negative),25(23.6%)had postoperative visual acuity lower than predicted(false-positive).·CONCLUSION:LAMBDA 100 clinical detection of retinal visual acuity meter has an excellent result in determining the non-dense non-mature cataract with high accuracy.The existence of false-negative and false-positive cases in different eyes provides a basis for intrao-perative implantation of different intraocular lens.·