AIM:To assess the clinical outcome after implantation of the Tetraflex accommodating intraocular lens(IOL).METHODS:Thirty eyes of 21 patients with cataract had phacoemulsification implantation of Tetraflex accommo-dating IOL.Twenty nine eyes of 20 age-matched patients with cataract had the same surgery with a conventional monofocal IOL.Patients were examined 1 day,7,30,and 90 days after surgery.All patients had assessments of slit lamp,refraction,uncorrected and best corrected distance and near visual acuity.The amplitude of accommodation,anterior chamber depth(ACD) before and after application of 20g/L pilocarpine were examined 90 days after surgery.RESULTS:Postoperatively,both groups had excellent uncorrected distance acuity,and best corrected distance acuity.The mean uncorrected near visual acuity was significantly better in the Tetraflex group than in the conventional monofocal IOL group.The retinoscopic accomodative range was 2.25±0.35D in Tetraflex group and 0.65±0.25D in monofocal IOL group(P<0.01).The mean ACD shoaling was 0.40±0.20 and 0.15±0.11mm after pilocarpine 20g/L eyedrops.The differences between the two groups was statistically significant(P<0.01).CONCLUSION:The Tetraflex accommodating IOL is safe and effective.It can provide better distant and near visual acuity.