Abstract:AIM:To observe the clinical effect of 1.8mm clear corneal incision phacoemulsification with ultra-thin intraocular lenses(IOLs)implantation for the treatment of short eye axis cataract, and to compare with the 3.0mm traditional clear corneal incision phacoemulsification.
METHODS:A prospective randomized study. Eighty-four cases(84 eyes)with short eye axis were selected. Ocular axis ranged 17.68～21.32mm(the average axis was 20.26±1.59mm). The cases with age-related cataract were randomly divided into two groups. Micro incision group(group A):1.8mm coaxial micro-incision phacoemulsification with ultra-thin IOLs implantation; Small incision group(group B):3.0mm coaxial small incision phacoemulsification with IOLs implantation. The effective phaco time(EPT)and the mean intraoperative ultrasound energy(AVE)were recorded. The postoperative best corrected visual acuity, intraocular pressure(IOP), central anterior chamber depth, corneal endothelial cell density, surgically induced astigmatism and operation complications were observed. All cases were followed up at 1d, 1wk, 1 and 3mo.
RESULTS:The EPT of group A and group B were 6.88±3.05, 7.04±3.57s respectively, the AVE were(14.54±7.26)% and(15.08±3.67)%. The EPT and AVE had no statistically significant difference between the two groups. At postoperative 1d, 1wk, 1 and 3mo, surgically induced astigmatism of group A was lower than that of group B and there was a significant difference between the two groups(P<0.05). The best corrected visual acuity and corneal endothelial cell density had no significant difference between the two groups. Postoperative intraocular pressure was significantly decreased in two groups and postoperative anterior chamber depth was significant deepen. Anterior chamber kept stable in all patients, no complications and no incision thermal burn were found during the operation.
CONCLUSION:The 1.8mm coaxial micro-incision can effectively reduce the astigmatism,and significantly improve the early visual function for treatment of short eye axis cataract compared to traditional 3.0mm coaxial small incision phacoemulsification.
