Correcting astigmatism with toric intraocular lenses: Effect of posterior corneal astigmatism
Correcting astigmatism with toric intraocular lenses: Effect of posterior corneal astigmatism
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DOI：
10.1016/j.jcrs.2013.06.027
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发表时间：
2013-12-01
影响因子：
2.8
通讯作者：
Wang, Li
中科院分区：
文献类型：
--
作者：
Koch, Douglas D.;Jenkins, Richard B.;Wang, Li
目得：评价角膜后散光对散光矫正型人工晶状体（IOLs）结果的影响。单位：Cullen眼科研究所，Baylor医学院，休斯顿，德克萨斯州，美国。设计：病例系列。方法：在白内障手术前和术后3周使用5种装置测量角膜散光。在手术时和术后3周裂隙灯下记录散光矫正型IOL对线。根据术后3周的屈光性散光计算实际角膜散光，并使用Holladay 2公式计算有效复曲面屈光度。预测误差计算为每个设备测量的散光与实际角膜散光之间的差异。所有计算均采用矢量分析法。使用IOLMaster、Lenstar、Atlas、手动角膜曲率计和Galilei（Placido-dual Scheimpflug联合分析仪），平均预测误差（D）分别为0.59@89.7，0.48@91.2，0.51@78.7，0.62@97.2，在93.9时，规则散光为0.57（60至120度），以及0.17@86.2、0.23@77.7、0.23@91.4、0.41@58.4、而对于逆规则（ATR）散光（0至30度和150至180度）为0.12@7.3。在WTR眼中，所有器械的WTR预测误差均显著（0.5至0.6屈光度[D]）。在ATR眼中，除Placido-dual Scheimpflug分析仪外，所有设备的WTR预测误差均为0.2 - 0.3 D（均P
PURPOSE: To evaluate the impact of posterior corneal astigmatism on outcomes with toric intraocular lenses (IOLs).SETTING: Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, USA.DESIGN: Case series.METHODS: Corneal astigmatism was measured using 5 devices before and 3 weeks after cataract surgery. Toric IOL alignment was recorded at surgery and at the slitlamp 3 weeks postoperatively. The actual corneal astigmatism was calculated based on refractive astigmatism 3 weeks postoperatively and the effective toric power calculated with the Holladay 2 formula. The prediction error was calculated as the difference between the astigmatism measured by each device and the actual corneal astigmatism. Vector analysis was used in all calculations.RESULTS: With the IOLMaster, Lenstar, Atlas, manual keratometer, and Galilei (combined Placido-dual Scheimpflug analyzer), the mean prediction errors (D) were, respectively, 0.59 @ 89.7, 0.48 @ 91.2, 0.51 @ 78.7, 0.62 @ 97.2, and 0.57 @ 93.9 for with-the-rule (WTR) astigmatism (60 to 120 degrees), and 0.17 @ 86.2, 0.23 @ 77.7, 0.23 @ 91.4, 0.41 @ 58.4, and 0.12 @ 7.3 for against-the-rule (ATR) astigmatism (0 to 30 degrees and 150 to 180 degrees). In the WTR eyes, there were significant WTR prediction errors (0.5 to 0.6 diopters [D]) by all devices. In ATR eyes, WTR prediction errors were 0.2 to 0.3 D by all devices except the Placido-dual Scheimpflug analyzer (all P