Junaid Hanif, Naseer Ahmad, Syed Abdullah Mazhar, Rana Naveed Iqbal, Fatima Afzal.
Effect on postoperative astigmatism by changing the axis of clear corneal incision in Phacoemulsification.
Ophthalmol Update Jan ;14(4):145-8.

Objective: To compare the mean post-operative astigmatism after phacoemulsification with superior clear corneal incision and temporal clear corneal incision in patients with cataract. Materials and Methods: After approval from ethical review committee (letter attached) 80 patients with cataract, fulfilling the inclusion criteria were included from the outpatient department (OPD) of Layton Rahmatullah Benevolent Trust Eye Hospital, Lahore. Patients were divided into two groups A & B using random numbers (Table:1). Both the groups received retrobulbar local anesthesia. Group A were treated by Phacoemulsification through superior clear corneal incision and Group B underwent Phacoemulsification with temporal clear corneal incision approach. Wound size of 3.2mm was constructed with the help of keratome and foldable lens was implanted in both the groups. Informed written consent was taken and surgical procedure as well as the research details were communicated to the patient at the time of advice of surgery. To control bias, only one experienced surgeon carried out the procedures. These procedures are routinely done in this hospital and there is no ethical issue to carry out the study. All the information was noted. Post-op astigmatism was recorded at 4th week post-op as per operational definition. Results: In our study, mean age was calculated 51.2+6.36 and 50.55+6.77 years in Group-A and B, 52.5%(n=19) in Group-A and 42.5%(n=17) in Group-B were male while 47.5%(n=21) in Group-A and 57.5%(n=23) were females, comparison of pre-operative astigmatism was calculated as 1.43+0.20 in Group-A and 1.47+0.22 in Group-B, p value was 0.31 showing insignificant difference, comparison of post-operative astigmatism was calculated as 1.06+0.16 in Group-A and 0.76+0.18 in Group-B, p value was 0.001 showing significant difference. Conclusion: It is concluded from this study that the mean post-operative astigmatism after phacoemulsification with temporal clear corneal incision was significantly reduced when compared with superior clear corneal incision in patients with cataract.

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