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Original Article

J Liaquat Uni Med Health Sci. 2013; 12(3): 151-155

Change in Pre Existing Corneal Astigmatism after Phacoemulsification through Clear Corneal Incision

Mahtab Alam Khanzada, Arshad Ali Lodhi, Nisar Ahmad Siyal, Shahid Azeem Mirza.

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.

Key words: cataract surgery, clear corneal incision, surgically induced astigmatism, Pre existing astigmatism.

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American Journal of Physiology, Biochemistry and Pharmacology


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