Correcting preoperative astigmatism using chosen incision in cataract surgery

Objective To evaluate the efficacy of the chosen incision on correcting preoperative corneal astigmatism in catarct surgery.Methods GroupA:40 eyes with astigmatism above 1.50 D received extracapsular catarct extraction with 10 mm scleral tunnel incision around negtive astigmatic axis.Group B:40 eyes with preoperative with the ruleastigmatism received extracapsular catarct extraction with 10 mm superior scleral tunnel incision.Corneal astigmatism and uncorrected vision acuty (UCVA)in all patients were measured preoperatively and potsperatively(3 day,1,3,6 month,1year).Results Preoperative corneal astigmatism was (+2.28±0.86)D in group A and (+2.24±0.91)D in group B.3 day postoperatively, postoperative astigmatism was (-1.16±0.95)D in group A and (+5.64±0.88)D in group B ,UCVA of 0.5 or better was 52% in group A and 12% in Group B .1 month postoperatively, postoperative astigmatism was (+0.77±0.91)D in group A and (+4.09±0.71)D in group B , UCVA of 0.5 or better was 68% in group A and 19% in group B.1 year postoperatively, postoperative astigmatism was (+1.39±0.78)D in group A and (+2.86±0.77)D in group B , UCVA of 0.5 or better was 55% in group A and 31% in group B. Conclusion This study showed that dhosed incision aroud negtive astigmatic axis chouid decrease potoperative astigmatism and produce good UCVA.