OBJECTIVE: To compare the change in pre existing corneal astigmatism after closing superonasal
incisions by single 10/0 suture and by simple hydration at the time of cataract surgery
with phacoemulsification through clear corneal incision.
DESIGN: Prospective, comparative and interventional.
SETTING: Department of Ophthalmology, Liaquat University of Medical and Health Sciences
Jamshoro, during the period from Jan 2011 to Sept 2011.
METHODS: This prospective study included 244 left eyes. All eyes went phacoemulsification
through a clear corneal incision (3.0 mm) superonasally. First 122 eyes were closed with single
10/0 sutures and remaining 122 with simple hydration. Magnitude of astigmatism was measured
by keratometer at 1 week, 4 and 8 weeks postoperatively. Vector analysis method was used to
calculate the surgical induced astigmatism. SPSS version 11.0 was used to analyze the data. P
value 0.05 was considered significant.
RESULT: Out of 244 patients 59.42% were males and 40.57% were female. The mean pre operative
astigmatism was >1.0 D. In early days there no significant change in post operative astigmatism
(0.50 ± 0.45 D / 0.75 ± 0.50 D, p value < 0.001) was found, but statistically significant
change in magnitude of astigmatism (0.84 ± 0.69 D / 2.25 ± 0.70 D, p value 0.05) and Surgically
Induced Astigmatism (0.81 ± 0.62D / 1.12 ± 0.94D) was found in first and second group respectively
at the end of follow-up.
CONCLUSION: Closing of clear corneal incision superonasally with our technique in the left
eyes is easy during phacoemulsification for right-handed surgeon without fear of increase in
pre existing astigmatism.
cataract surgery, clear corneal incision, surgically induced astigmatism, Pre existing