Effect
of Suture Material Upon Postoperative Corneal Astigmatism Following Cataract
Extraction: A Comparison of NyLon and Prolene
Arporn
Prabriputaloong, M.D.
Department of Ophthalmology,
Srinagarind Hospital, Faculty of Medicine, Khon Kaen University, Khon Kaen,40002
ABSTRACT A comparative
study of postoperative changes in comeal astigmatism produced by nylon and
prolene sutures in 55 consecutive cases (61 eyes) that had extracapsular cataract
extrac tion with posterior chamber intraocular lens implantation was conducted.
All cases were performed by one surgeon between September 1989 and August
1990, using the same surgical technique.
Keratometric measurements
at the visual axis were performed preoperatively and two months postoperatively.
The mean values for preoperative astigmatism were +0.04 dioptres for nylon
and +0.05 dioptres for prolene and that for postoperative astigmatism were
+0.82 dioptres for nylon and +0.87 dioptres for prolene. There were significant
mean increase in with-the-rule astigmatism for both nylon and prolene sutures
postoperauvely (P=0.02 and 0.01). The surgically-induced comeal astigmatism
was +0.79 dioptres for nylon and +0.84 dioptres for prolene.
There was no statistical
significant difference in postoperative and surgically-induced corneal astigmatism
between the two groups (P=0.89 and 0.87).
Thai J Ophthalmol 1990; July - Dec 4 (2):
119-124
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