Influence Of Surgical Factors On Postoperative Refractive Power And Astigmatism After Keratoplasty
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Influence of Surgical Factors on Postoperative Corneal Refractive Power and Astigmatism after Keratoplasty
Mohamed Bahgat Goweida, FRCS, MD, Hany Ahmed Helaly, MD.
Lecturer of Ophthalmology, Faculty of Medicine, Alexandria University
Settings: Faculty of Medicine, Alexandria University, Egypt.
Purpose: To analyze the influence of various surgical factors on the post-operative corneal refractive power and astigmatism after keratoplasty in eyes with corneal diseases.
Methods: Retrospective study of 100 eyes with clear grafts six months following keratoplasty, the influence of different surgical factors (technique of keratoplasty, type of suturing, size of trephination) on the post-operative corneal refractive power and astigmatism was analyzed. All included patients signed an informed consent.
Results: Around 70% of the cases of the four subgroups had keratoconus. The flattest 6 months postoperative keratometric readings was the penetrating keratoplasty (PK) with interrupted sutures subgroup with mean 43.90 + 3.09 D. The steepest was the deep anterior lamellar keratoplasty (DALK) with double running sutures subgroup with mean 45.30 + 1.70 D. The highest 6 months postoperative astigmatism was the PK with interrupted sutures subgroup with mean 7.15 + 1.95 D. The lowest was the PK with double running sutures subgroup with mean 2.36 + 1.15 D.
Conclusion: Interrupted sutures resulted in significantly higher postoperative astigmatism in both PK and DALK before suture removal.