Angela Ofeibea Amedo, Kwadwo Amoah, Nana Yaa Koomson, David Ben Kumah, Eugene Appenteng Osae Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana Abstract: To investigate which of two tunnel incision forms (frown versus straight) in sutureless manual small incision cataract surgery creates more corneal astigmatism.Sixty eyes Shelf Support of 60 patients who had consented to undergo cataract surgery and to partake in this study were followed from baseline through >12-week postoperative period.Values of preoperative and postoperative corneal astigmatism for the 60 eyes, measured with a Bausch and Lomb keratometer, were extracted from the patients’ cataract surgery records.
Residual astigmatism was computed as the difference between preoperative and postoperative keratometry readings.Visual acuity was assessed during the preoperative period and at each postoperative visit with a Snellen chart at 6 m.Fifty eyes of 50 patients were successfully followed-up on.
Overall, the mean residual astigmatism was 0.75±0.12 diopters.
The differences in mean residual astigmatism between the two different incision groups Impact were statistically significant (t [48]=6.33, P<0.05); frown incision group recorded 1.
00±0.12 diopters, whereas the straight incision group recorded 0.50±0.
12 diopters.No significant difference was observed between male and female groups (t [48]=0.24, P>0.
05).Residual corneal astigmatism in the frown incision group was significantly higher than in the straight incision group.Fisher’s exact test did not reveal a significant association between incision forms and visual acuity during the entire postoperative period (P>0.
05).Keywords: cataract, residual corneal astigmatism, frown incision, straight incision.