O'Driscoll A M, Goble R R, Hallack G N, Andrew N C
Department of Ophthalmology, Kent and Canterbury Hospital, UK.
Eye (Lond). 1994;8 ( Pt 5):538-42. doi: 10.1038/eye.1994.133.
A prospective, randomised study was performed on 52 patients undergoing routine limbal extracapsular cataract surgery to compare the effect of 10/0 nylon and 9/0 elastic polypropylene sutures on post-operative astigmatism. Both the magnitude and the axis of the astigmatism were measured by keratometry and refraction pre-operatively and at regular intervals for 3 months post-operatively. Both groups showed an increase in the magnitude of astigmatism immediately post-operatively. The polypropylene group showed a more rapid decrease in astigmatism over the first 7 days and subsequent stabilisation, although the only significant (p < 0.05) difference in astigmatism between the two groups was at 1 week post-operatively. Both groups showed 'with-the-rule' astigmatism immediately post-operatively, although more of the polypropylene group developed 'against-the-rule' astigmatism by the end of the study. Despite an early reduction in post-operative astigmatism in the polypropylene group, early spectacle prescribing would not be recommended because of the shift in the axis of astigmatism. In addition, the polypropylene group had a 4 times greater incidence of iris prolapse compared with the nylon group.
对52例行常规角膜缘外白内障手术的患者进行了一项前瞻性随机研究，以比较10/0尼龙缝线和9/0弹性聚丙烯缝线对术后散光的影响。术前及术后3个月定期通过角膜曲率计和验光测量散光的度数和轴向。两组术后散光度数均立即增加。聚丙烯组在术后第1周散光度数下降更快，随后趋于稳定，尽管两组之间仅在术后1周散光有显著差异（p<0.05）。两组术后立即均表现为顺规散光，尽管在研究结束时，聚丙烯组更多患者发展为逆规散光。尽管聚丙烯组术后散光早期有所降低，但由于散光轴向的改变，不建议早期配镜。此外，聚丙烯组虹膜脱垂的发生率是尼龙组的4倍。
