Abstract
Purpose: To compare the astigmatism induced by clear corneal incisions (CCls) and comeoscleral tunnel incisions (CSIs) for cataract surgery over 6 months.Setting: Rotterdam Eye Hospital, Rotterdam, The Netherlands.Methods: Thirty-five patients having phacoemulification were recruited prospectively; 15 had CCIs and 20, CSIs. Corneal topography was performed by computerized videokeratoscopy preoperatively and 6 months postoperatively. The change in keratometric astigmatism was calculated using the absolute magnitude and vector analysis methods.Results: There was no significant difference between the change in astigmatism produced by the two incisions (Student's t-test).Conclusion: The CCI for cataract surgery did not produce significantly greater astigmatism than the CSI. Concern over CCIs having a greater risk of increasing corneal astigmatism is unfounded and does not justify withholding the technique from patients it could benefit.
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