AIM: To study and compare the outcomes of coaxial 2.2 mm phacoemulsiflcation with conventional coaxial 3 mm small-incision cataract surgery.

METHODS:A randomized prospective study was conducted on 100 patients with age-related cataract: coaxial 2.2 mm micro-incision cataract surgery was performed in 50 cases(50 eyes), and coaxial 3 mm small incision cataract surgery was performed in 50 cases(50 eyes). Statistical analysis was takenwith the data of the two groups. Visual acuity, VF and QOL were compared at intervals of 1wk and 3mo after surgery. In addition, surgically induced astigmatism(SIA)was analyzed. Statistic analysis was taken by Student's t-test and Chi-square test.

RESULTS: There was no significant difference on BCVA(t=-1.366, -1.688; P=0.148, 0.107)between these two groups. One week and 3mo after the surgery, SIA was(0.46±0.29)D,(0.43±0.26)D in the 2.2 group; and(1.55±0.59)D,(0.89±0.28)D, in 3.0 group. The differences between these two groups were statistically significant(t=-7.348, -3.788; P=0.000, 0.000)There were no statistically significant differences on VF scores between two group, while it's got a better score in 2.2 groups on vision adaptation.(t=-3.348, P<0.05).

CONCLUSION:Coaxial 2.2mm micro-incision cataract surgery could significantly reduce SIA and obtain morestable status of VF and QOL. This suggests that the coaxial 2.2 phacoemulsification surgery implanted AkreosMI60 intraocular lens could get earliervisual rehabilitation postoperation.