Bimanual Microincisional Phacoemulsification

Objective: to study the feazibility and evalue the efficacyand safety of bimanual phacoemulsification.Methods: The preliminary clinical study included 160 age-related cataract eyes which were divided into two groups rand.rely. GroupⅠ(80cases, 80eyes)were received cataract extraction through the 1.2mm incision. Acri.Smart 36A IOLs were implanted into the eyes through 1.9mm incision. GroupⅡ(80eases, 80eyes) were received normal phaeoemulsification andAcrysof Nature IOLs were implanted into the eyes through 3.Omm incision. All surgeries were performed by the same surgeon using the same machine(Sovereign WhiteStar, AMO).Preoperative examination included visual acuity test, bestcorrected visual acuity, optometry, IOP, intraocular lens diopter, corneal curvature, corneal endothelium, corneal topography. The IOP of all preoperation patients were less than 21mmHg, B-scan ultrasonographic observation showed the structure of retina normal, Axial Eye length measurement with alternative A/B scan for IOL power calculation. Routine eye examinations were carried out and excluded leucoma, DR, AMD and the astigmatism that greater than 1D. The operation ti me, complications in-operation and post-operation, visual acuityand corneal astigmatism at 1 week, 1 month after the operation were compared. Patients were followed up for 3-6 months. Data was analyzed using SPSS 11.0 software. The statistics method is T test and Chi-square test.Results: All the patients had a stable anterior chamber andwithout thermal burns developed at the incision site. GroupⅠthe mean effective phacoemulsification time(EPT) was 5.91±4.70 seconds, while that in GroupⅡwas 7.1±2.30seconds. Inthe first postoperative day, the surgical induced astigmatism(SIA) was 0.75±0.26D and 2.28±0.43D in GroupⅠand GroupⅡ.There is significant difference statistically (P＜0.01). In the 7th postoperative day, SIA was0.65±0.24D in GroupⅠand 2.05±0.54D in GroupⅡ, There is still difference atistically (P＜0.05). But one month after surgery, the SIA of bothgroups is 0.67±0.22D and 1.45±0.75D, there is no statisticaldifference (P＞0.05). Corneal endothelium count was 2590.6±243/mm~2 in GroupⅠand 2623±287/mm~2 in GroupⅡ1 month after surgery, there is no statistical difference (P＞0.05)Conclusions: Bimanual microincision phacoemulsification andimplantation of the Acri. smart IOL is a feasible, secure and effective surgery for cataract extraction and also is a better choice of cataract surgery.