The Impact Of Two Different Surgical Incisions Of Phaco-cataract Exaction On The Corneal Astigmatism

Objective：To study the impact of two different phacoemulsification incisionson the surgically induced corneal astigmatism for the post operationage-related cataract patients.Methods：Randomly divided those who had undergone the phaco-surgeryfrom August2011to December2011into two groups. Those had incisions onthe edge of the upper sclera (11:00to12:00) are group A, in which includedthirty cases (32eyes). And group B are those on the3.2mm wide transparentcornea of the temporal side with thirty-two cases (35eyes). In order tocompare the impact of group A and B with two different phacoe-incisions onthe surgically induced corneal astigmatism, we observed and measuredcarefully the corneal astigmatism status in various stages of pre-operation andpost-operation (we sampling four stages: pre-surgery, one week, one monthand three months after surgery) under the help of the corneal curvatureinstrument. All experimental data are showed by the means of average value±standard D-value. We adopted T test to make statistical analysis, which meansonly when P<0.05could those differences get statistical significance.Results：By comparing the corneal curvature rate of those two groups in theirstage of pre-operation and one week after surgery respectively, there showsno significant difference and also no statistical meaning for their results P>0.05.However, the statistical comparison of the data got from the stage of onemonth and three months after surgery indicates that the surgically inducescorneal astigmatism of group A is more significant than group B. Conclusion：The phacoemulsification incisions on the transparent cornea ofthe temporal side owns the advantages of relatively short time, minor surgicalcomplications and less adverse effects on corneal astigmatism.