白内障手术患者的测量角膜散光与人工晶状体预测的屈光性散光比较。
Measured Corneal Astigmatism Versus Pseudophakic Predicted Refractive Astigmatism in Cataract Surgery Candidates.
机构信息
From the Department of Ophthalmology, Shaare Zedek Medical Center (A.A., A.P.-R., M.T., D.Z.), affiliated to the Hebrew University, Jerusalem, Israel.
Sir Charles Gairdner Hospital (G.D.B.), University of Western Australia, Perth, Western Australia, Australia; Lions Eye Institute (G.D.B.)(G.D.B.), affiliated to the University of Western Australia, Perth, Western Australia, Australia.
出版信息
Am J Ophthalmol. 2022 Aug;240:225-231. doi: 10.1016/j.ajo.2022.02.029. Epub 2022 Mar 12.
PURPOSE
To compare standard and total corneal astigmatism measurements to the predicted pseudophakic (nontoric) refractive astigmatism in candidates for cataract surgery.
DESIGN
A retrospective, cross-sectional study.
METHODS
A single-center analysis of consecutive eyes measured with a swept-source optical coherence tomography biometer at a large tertiary medical center between February 2018 and June 2020. Corneal astigmatism was calculated based on standard keratometry astigmatism (KA), total corneal astigmatism (TCA), and predicted refractive astigmatism (PRA) for a monofocal nontoric intraocular lens (IOL) implantation calculated by the Barrett toric calculator using the predicted posterior corneal astigmatism (PRA) and the measured posterior corneal astigmatism (PRA) options. Separate analyses were performed for each eye.
SETTING
Ophthalmology Department, Shaare Zedek Medical Center, Jerusalem, Israel.
RESULTS
In total, 8152 eyes of 5320 patients (4221 right eyes [OD] and 3931 left eyes [OS], mean age 70.6±12.2 years, 54.2% females) were included in the study. The mean vector values (centroid) for KA, TCA, PRA, and PRA were 0.07 diopters [D] at 19.5°, 0.27 D at 7.5°, 0.44 D at 2.9°, and 0.43 D at 179.3°, respectively (P < .01), for OD and 0.02 D at 150.3°, 0.23 D at 169.7°, 0.40 D at 179.4°, and 0.42 D at 169.5°, respectively (P < .01), for OS. More than 73% of eyes had a PRA >0.5 D.
CONCLUSIONS
Standard and total corneal astigmatism measurements differ significantly from the PRA by the Barrett toric calculator. The PRA, rather than the KA or TCA, should be used as the reference guide for astigmatism correction with toric IOL implantation.
目的
比较标准和总角膜散光测量值与白内障手术候选者的预测非散光（无散光）屈光性散光的差异。
设计
回顾性、横断面研究。
方法
在 2018 年 2 月至 2020 年 6 月期间，在一家大型三级医学中心，对使用扫频源光相干断层扫描仪进行测量的连续眼进行单中心分析。角膜散光基于标准角膜曲率计散光（KA）、总角膜散光（TCA）和单焦点非散光人工晶状体（IOL）植入物的预测屈光性散光（PRA）计算，该计算使用 Barrett 散光计算器通过预测后角膜散光（PRA）和测量后角膜散光（PRA）选项进行。对每只眼分别进行分析。
设置
以色列耶路撒冷 Shaare Zedek 医疗中心眼科。
结果
共纳入 5320 名患者的 8152 只眼（右眼 4221 只，左眼 3931 只，平均年龄 70.6±12.2 岁，女性占 54.2%）。KA、TCA、PRA 和 PRA 的平均向量值（质心）分别为 0.07 屈光度（D）在 19.5°、0.27 D 在 7.5°、0.44 D 在 2.9°和 0.43 D 在 179.3°（P<.01），右眼为 0.02 D 在 150.3°、0.23 D 在 169.7°、0.40 D 在 179.4°和 0.42 D 在 169.5°（P<.01），左眼。超过 73%的眼睛 PRA>0.5 D。
结论
标准和总角膜散光测量值与 Barrett 散光计算器的 PRA 有显著差异。在使用散光 IOL 植入物进行散光矫正时，应使用 PRA 而不是 KA 或 TCA 作为参考指南。
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