Surgically Induced Astigmatism after Superior versus Temporal scleral Incision in Manual Small Incision Cataract Surgery - A Hospital Based Randomised Controlled Trial

摘要

Background and objectives : Of the total estimated 38 million blind people in the world, nine to 12million are in India 50 to 80% of these people are blind because of cataract. Inaddition to the backlog, an additional 3.8 million become blind each year becauseof cataract. The objective of the present study was evaluate and compare theamount of induced astigmatism after superior and temporal incision in manualsmall incision cataract surgery (SICS). Methodology : The present one year randomized clinical trial study was conducted in theDepartment of Ophthalmology, KMCH, Katihar, Bihar on 100 patients undergoing manual SICS. The patients were assigned randomly into two groups by computer generatedtable namely Group 1 (SICS using superior scleral incision) and Group 2 (SICSusing temporal scleral incision). Results : In group A with superior incision the average SIA was 0.96 ± 0.68 and ingroup B with temporal incision the average SIA was 0.65 ± 0.59. The comparisonbetween mean of the two groups using unpaired 't' test was statisticallysignificant (p=0.020) indicating group B had less SIA. Superior incision inducedATR (58%) and temporal incision induced WTR (68%).