Churchill A J, Hillman J S
Department of Ophthalmology, St James's University Hospital, Leeds, UK.
Eye (Lond). 1996;10 ( Pt 1):103-6. doi: 10.1038/eye.1996.17.
Fifty eyes in 50 patients with > 2.5 dioptres (D) of with-the-rule astigmatism (refraction) following uncomplicated extracapsular cataract extraction were recruited for this prospective study. Selected single sutures were removed and both the amount of astigmatic loss and the change in axis were measured at intervals. After removal of the first suture the mean astigmatic loss at 1 week was 2.9 D by keratometry and the mean change in the axis was 23 degrees (74% occurred within the first hour). The astigmatic loss was greater with subsequent suture removal. Timing of suture removal (before or after 8 weeks) and the amount of initial post-operative astigmatism (more than or less than 5 D) had a minimal effect on the total astigmatic loss. We suggest selective single suture removal can be performed safely at 5-6 weeks post-operatively with removal of a second suture, if necessary, in the steepest axis after 1 hour. The prescription of spectacles should be delayed for 1 week after the final suture has been removed.
本前瞻性研究招募了50例患者的50只眼睛，这些患者在无并发症的囊外白内障摘除术后伴有2.5屈光度（D）以上的顺规散光（屈光）。拆除选定的单根缝线，并定期测量散光减少量和轴位变化。拆除第一根缝线后，角膜曲率计测量1周时平均散光减少量为2.9D，轴位平均变化为23度（74%发生在最初1小时内）。随后拆除缝线时散光减少量更大。缝线拆除时间（8周之前或之后）以及术后初始散光量（大于或小于5D）对总散光减少量影响极小。我们建议可在术后5 - 6周安全地进行选择性单根缝线拆除，如有必要，1小时后在最陡轴位拆除第二根缝线。最终缝线拆除后1周再开具眼镜处方。
