屈光手术后患者术前未知K读数的计算
Calculation of Unknown Preoperative K Readings in Postrefractive Surgery Patients.
作者信息
Rosa Nicola, De Bernardo Maddalena, Borrelli Maria
机构信息
Department of Medicine and Surgery, University of Salerno, Salerno, Italy.
Department of Ophthalmology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.
出版信息
J Ophthalmol. 2018 Feb 11;2018:3120941. doi: 10.1155/2018/3120941. eCollection 2018.
PURPOSE
To determine the unknown preoperative K readings (Kpre) to be used in history-based methods, for intraocular lens (IOL) power calculation in patients who have undergone myopic photorefractive keratectomy (PRK).
METHODS
A regression formula generated from the left eyes of 174 patients who had undergone PRK for myopia or for myopic astigmatism was compared with other methods in 168 right eyes. The Pearson index and paired -test were utilized for statistical analysis.
RESULTS
The differences between Kpre and those obtained with the other methods were as follows: 0.61 ± 0.94 D (range: -3.94 to 2.05 D, < 0.01) subtracting the effective treatment, 0.01 ± 0.86 D (range: -2.61 to 2.34 D, = 0.82) with Rosa's formula, -0.02 ± 1.31 D (range: -3.43 to 3.68 D, = 0.82) with the current study formula, and -0.43 ± 1.40 D (range: -3.98 to 3.12 D, < 0.01) utilizing a mean K (Km) of 43.5 D.
CONCLUSIONS
These formulas may permit the utilization of history-based methods, that is, the double-K method in calculating the IOL power following PRK when Kpre are unknown.
目的
确定在基于病史的方法中用于近视性准分子激光原位角膜磨镶术（PRK）患者人工晶状体（IOL）屈光度计算的术前未知角膜曲率读数（Kpre）。
方法
将从174例因近视或近视散光接受PRK手术的患者左眼得出的回归公式与168例右眼的其他方法进行比较。采用Pearson指数和配对t检验进行统计分析。
结果
Kpre与其他方法得出的值之间存在以下差异：减去有效治疗后为0.61±0.94D（范围：-3.94至2.05D，P<0.01）；采用罗莎公式时为0.01±0.86D（范围：-2.61至2.34D，P = 0.82）；采用本研究公式时为-0.02±1.31D（范围：-3.43至3.68D，P = 0.82）；采用平均角膜曲率（Km）为43.5D时为-0.43±1.40D（范围：-3.98至3.12D，P<0.01）。
结论
当Kpre未知时，这些公式可能允许采用基于病史的方法，即双K法来计算PRK术后的IOL屈光度。
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