This meta-analysis studied toric intraocular lens (IOL) alignment accuracy using image-guided and manual marking methods by comparing the axis misalignment of toric IOLs, percentage of eyes with toric IOL axis misalignment within ±5 degrees, postoperative astigmatism, difference vector, and postoperative uncorrected distance visual acuity. The methodological quality was assessed using the modified Quality Assessment of Diagnostic Accuracy Studies-2 tool. Continuous variables were analyzed using weighted mean differences, and dichotomous variables were compared using the odds ratio. Five studies comprising a total of 257 eyes were analyzed. For heterogeneity, neither sensitivity analysis nor the Egger test detected statistical findings. The image-guided marking group had smaller toric IOL axis misalignment (P < .00001), less postoperative astigmatism (P = .003), and a smaller difference vector (P < .00001) than the manual marking group. The overall evidence from the studies indicates that image-guided marking is better than manual marking, resulting in less axis misalignment, a smaller difference vector, and less postoperative astigmatism.

中文翻译：

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白内障患者复曲面人工晶状体对准精度的比较荟萃分析：图像引导系统与手动标记。

这项荟萃分析使用图像引导和手动标记方法研究了复曲面人工晶状体（IOL）的对准精度，方法是比较复曲面IOL的轴未对准，±5度以内的复曲面IOL轴未对准的眼睛百分比，术后散光，差异向量和术后未矫正的远视力。使用改进的诊断准确性研究质量评估工具2评估方法学质量。使用加权均值差分析连续变量，并使用比值比比较二分变量。分析了五项研究，共257眼。对于异质性，灵敏度分析和Egger检验均未检测到统计结果。图像引导标记组的复曲面IOL轴未对准较小（P <.00001），与手动标记组相比，术后散光更少（P = .003），差异向量更小（P <.00001）。研究的总体证据表明，图像引导标记优于手动标记，从而减少了轴偏移，减小了差异向量并减少了术后散光。