Outcome of Clear Corneal Incision on Steep Meridian in Eye with Pre Existing Corneal Astigmatism after Phacoemulsification
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2018, Vol 17, Issue 11
Abstract
Purpose: To study the outcome of clear corneal incision on steep meridian in eye with pre existing corneal astigmatism after phacoemulsification. Method: It was a rural hospital based, prospective, interventional study which included 84 eyes of 84 patients with immature cataract and pre existing corneal astigmatism of up to 1.5 D who underwent 3.2 mm clear corneal phacoemulsification procedure either superior incision in patients having WTR or temporal incision in patients having ATR by single surgeon. Thus patients were grouped in two categories depending upon type of pre operative corneal astigmatism. Superior incision and temporal incision, each had 42 patients. The data was analyzed by chi-square test and p value < 0.05 was considered significant.The preoperative & postoperative UCVA, preoperative and postoperative corneal astigmatism at 6 weeks were compared in the both the groups. The SIA at 6 weeks was compared between the two groups. SIA was calculated by SIA calculator version 2.1 free online software. Results: There was statistically significant difference (P value= 0.0001) between preoperative and postoperative UCVA in both superior and temoral incision, suggestive of better postoperative UCVA. Mean preoperative astigmatism in superior incision group was 0.79±0.26 and mean postoperative astigmatism was 0.47±0.32, (P value = 0.02) which was statistically significant. Mean preoperative astigmatism in temporal incision group was 0.76±0.28 and mean postoperative astigmatism was 0.45±0.28, (P value= 0.03) which was statistically significant. The mean SIA in superior incision group was 0.68±0.22 D and in temporal was 0.55±0.20 D. P value was 0.029. Thus SIA by temporal incision was less than superior incision. Conclusion: By placing incision on steep meridian there was significant reduction of corneal astigmatism postoperatively in majority of patients and hence better UCVA .The SIA by superior and temporal incision showed that temporal incision has less SIA than superior incision.
Authors and Affiliations
Dr. Archana Thool, Dr. Sachin Daigavane
Keywords
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- EP ID EP406768
- DOI 10.9790/0853-1711011118.
- Views 27
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