Eom Youngsub, Song Jong Suk, Kim Yong Yeon, Kim Hyo Myung
From the Department of Ophthalmology, Korea University College of Medicine, Seoul, South Korea.
From the Department of Ophthalmology, Korea University College of Medicine, Seoul, South Korea.
J Cataract Refract Surg. 2015 Aug;41(8):1650-7. doi: 10.1016/j.jcrs.2014.12.053.
To compare the accuracy of the SRK/T and Haigis formulas for predicting corneal astigmatism correction with a toric intraocular lens (IOL).
Department of Ophthalmology, Korea University College of Medicine, Seoul, South Korea.
Retrospective cross-sectional study.
Eyes with an Acrysof toric IOL were enrolled in the study. The corneal plane effective cylinder power of toric IOLs (target induced astigmatism vector [TIA]) predicted by the SRK/T and Haigis formulas were compared with the cylindrical correction achieved postoperatively (surgically induced astigmatism vector [SIA]). The magnitude of error was defined as the difference between the magnitudes of the SIA and TIA. The median absolute magnitudes of error predicted by the SRK/T and Haigis formulas were compared. The median absolute errors predicted by the 2 formulas were also compared.
The mean postoperative SIA was 1.80 diopters (D) ± 0.55 (SD). The magnitude of error predicted by the SRK/T and Haigis formulas was 0.31 ± 0.40 D and 0.23 ± 0.40 D, respectively. The median absolute magnitude of error predicted by the Haigis formula was statistically significantly smaller than that predicted by the SRK/T formula (P < .001). The median absolute error predicted by the Haigis formula (0.35 D) was also statistically significantly smaller than that predicted by the SRK/T formula (0.43 D) (P = .003).
The Haigis formula was more accurate than the SRK/T formula not only in predicting the refractive outcome but also in predicting corneal astigmatism correction by toric IOLs.
No author has a financial or proprietary interest in any material or method mentioned.
比较SRK/T公式和海吉斯公式预测使用环曲面人工晶状体（IOL）矫正角膜散光的准确性。
韩国首尔高丽大学医学院眼科。
回顾性横断面研究。
纳入植入Acrysof环曲面IOL的眼睛。将SRK/T公式和海吉斯公式预测的环曲面IOL的角膜平面有效柱镜度数（目标诱导散光矢量[TIA]）与术后实现的柱镜矫正度数（手术诱导散光矢量[SIA]）进行比较。误差大小定义为SIA和TIA大小之间的差异。比较SRK/T公式和海吉斯公式预测的误差的中位绝对大小。还比较了这两个公式预测的中位绝对误差。
术后平均SIA为1.80屈光度（D）±0.55（标准差）。SRK/T公式和海吉斯公式预测的误差大小分别为0.31±0.40 D和0.23±0.40 D。海吉斯公式预测的误差的中位绝对大小在统计学上显著小于SRK/T公式预测的误差的中位绝对大小（P <.001）。海吉斯公式预测的中位绝对误差（0.35 D）在统计学上也显著小于SRK/T公式预测的中位绝对误差（0.43 D）（P =.003）。
海吉斯公式在预测屈光结果以及预测环曲面IOL矫正角膜散光方面比SRK/T公式更准确。
没有作者对文中提及的任何材料或方法有财务或专利权益。
