The effect of cataract surgery on postural control
The effect of cataract surgery on postural control
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DOI：
10.1167/iovs.04-0543
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发表时间：
2005-03-01
影响因子：
4.4
通讯作者：
Morad, Y
中科院分区：
文献类型：
--
作者：
Schwartz, S;Segal, O;Morad, Y
目的。跌倒是老年人发病的一个重要原因。由于视力下降是这个年龄段跌倒的一个重要危险因素，我们试图检查白内障摘除对姿势稳定性的影响。白内障是视力障碍的主要原因。方法：对23名接受白内障手术的患者在手术前和术后1至4个月进行姿势稳定性测量。稳定性指数包括稳定性效应、姿势摆动的傅立叶频谱和同步性，并在这些测量的基础上，下降指数，这已被证明在早期研究中预测跌倒的风险。结果：所有患者手术眼的视力在手术后显著提高(P<；0.01)，对侧眼没有变化。当用手术眼观察时，大多数患者(19/23)的稳定性有所改善，姿势摆动的傅立叶频谱在高频段(0.5赫兹以上)有所改善，但用非手术眼观察时没有改善(P<；0.05)。根据Flowing Index，在手术前，23名患者中有12名处于高危跌倒状态，只有6名处于低危状态。手术后，23例中有16例处于低风险状态，仅3例仍处于高风险状态(X(2)检验，P<；0.008)。结论：白内障手术显著改善了体位稳定性。考虑到老年人跌倒相关损伤的治疗成本很高，这一发现可能意味着白内障手术在这方面是具有成本效益的。
PURPOSE. Falls are a significant cause of morbidity in the elderly. Because decreased vision is known to be a significant risk factor for falling in this age group, we sought to examine the effect of the removal of cataract, a major cause of visual handicap, on postural stability.METHODS. Postural stability was measured in 23 patients who underwent cataract surgery, before and 1 to 4 months after surgery. Stability indices included Stability Effect, Fourier Spectrum of Postural Sway, and Synchronizations, and, based on these measurements, Falling Index, which had been shown in earlier studies to predict the risk of falling.RESULTS. Visual acuity in the surgical eye significantly improved in all patients after surgery (P < 0.01) and did not change in the fellow eye. Stability improved in most patients (19/23) and Fourier Spectrum of Postural Sway improved in the high-frequency bands (above 0.5 Hz), when viewing with the surgical eye, but not when viewing with the nonsurgical eye (P < 0.05). By Falling Index, before surgery, 12 of 23 patients were at high risk of falling, and only six were at low risk. After surgery, 16 of 23 were at low risk and only three remained at high risk (chi(2) test, P < 0.008).CONCLUSIONS. Cataract surgery significantly improves postural stability. Considering the high cost of treating fall-related injuries in the elderly, the findings may imply that cataract surgery is cost effective in this regard.