Comparison of astigmatic correction with and without limbal marking during small-incision lenticule extraction

屈光度 散光 医学 小切口晶状体摘除术 眼科 折射误差 显著性差异 前瞻性队列研究 随机对照试验 外科 验光服务 眼病 视力 内科学 角膜磨镶术 光学 物理
作者
Boyuan Wang,Yan Wang,Jiamei Zhang
出处
期刊:Journal of Cataract and Refractive Surgery [Lippincott Williams & Wilkins]
卷期号:48 (8): 924-928 被引量:3
标识
DOI:10.1097/j.jcrs.0000000000000889
摘要

In Brief Purpose: To compare clinical outcomes after correction of moderate to high astigmatism through small-incision lenticule extraction (SMILE) with and without limbal marking. Setting: Tianjin Eye Hospital, Tianjin, China. Design: Prospective randomized comparative case series. Methods: This prospective randomized control study included 240 unilateral eyes of 240 patients who underwent SMILE with astigmatism of more than 0.75 diopters (D). The eyes were randomly assigned to a marked group (120 eyes) or an unmarked control group (120 eyes). Manifest refraction was observed at the 3-month follow-up timepoint and evaluated using a vector analysis. Results: Postoperative astigmatism differed statistically significantly in the marked group (−0.08 ± 0.15 D) and the control group (−0.16 ± 0.24 D) at 3 months (P = .001), and correction index, index of success, angle of error (absolute value), and magnitude of error were also significantly better in the marked group (P < .05). There was a significant positive correlation between index of success and angle of error (absolute value) (P < .001). Conclusions: Limbal marking–based manual compensation prior to SMILE was associated with a statistically significant reduction in undercorrection and error of axis in cases of moderate to high astigmatism, although the magnitude of the difference was small. Limbal marking-based manual compensation prior to SMILE can significantly reduce undercorrection and the error of axis in cases of moderate to high astigmatism.
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