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International Journal of Recent Trends in Science and Technology, ISSN 2277-2812 E-ISSN: 2249-8109
Volume 12, Issue 3, September 2014 pp 517-521
Comparison of surgically induced astigmatism (SIA) and postoperative astigmatism with superior, superotemporal and temporal incisions in phacoemulsification surgery
Snehal P Gade1, Bhaskar S Khaire2
1Assistant Professor, 2Professor and HOD, Department of Ophthalmology, Government Medical College, Aurangabad, Maharashtra, INDIA.
Introduction: Cataract is defined as any opacity of lens or capsule which is either developmental or acquired. Cataract surgery is the commonest procedure performed in ophthalmology. Astigmatism prevention and control is one of the biggest challenges for a surgeon after cataract surgery. Since postoperative astigmatism is the major determinant of visual outcome, a comparative study is essential to ascertain the difference in induced astigmatism, if any between different sites of incision in Phacoemulsification keeping the size of incision same. Aims and Objectives: To compare postoperative astigmatism and surgically induced astigmatism (SIA) with superior, superotemporal and temporal incisions in phacoemulsification surgery. Materials and Method: This prospective study comprised of 150 patients of cataract operated by using phacoemulsification using superior, superotemporal and temporal incisions. All the patients were divided in three groups containing 50 patients each depending upon the type of incision used. The outcome measures were post operative and surgically induced astigmatism (SIA) post operatively. Results: The pre-operative astigmatism in all three groups was measured it was in the range of 0 to 1.5D with no statistical significant difference. Majority of the patients were having post operative astigmatism between 0.75 to 1.25D. i.e. 44% in group A, 60% in group B and 58% in group C. Surgically induced astigmatism less than 0.75D in group A was seen in 78% patients whereas in group B was 92% and in group C was 90%. According to the Tukey’s multiple comparison test, post operative and surgically induced astigmatism was statically significant in group A and C. Whereas the difference in group A and B and group B and C was not significant. Conclusion: temporal and superotemporal incision leads to significantly less amount of mean post-operative astigmatism as well as Surgically Induced Astigmatism (SIA) as compared to superior incision.