Centro Oftalmológico Dr. Charles Sociedad Anónima, Buenos Aires, Argentina.
Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, United States of America.
PLoS One. 2019 Nov 7;14(11):e0224981. doi: 10.1371/journal.pone.0224981. eCollection 2019.
To compare the intraocular lens calculation formulas and evaluate postoperative refractive results of patients with previous hyperopic corneal refractive surgery.
Retrospective, comparative, observational study.
Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, USA.
Clinical charts and optical biometric data of 39 eyes from 24 consecutive patients diagnosed with previous hyperopic laser vision correction and cataract surgery were reviewed and analyzed. The Intraocular lens (IOL) power calculation using the Holladay 2 formula (Lenstar) and the American Society of Cataract and Refractive Surgery (ASCRS) Post-Refractive IOL Calculator (version 4.9, 2017) were compared to the actual manifest refractive spherical equivalent (MRSE) following cataract surgery. No pre-Lasik / PRK or post-Lasik / PRK information was used in any of the calculations. The IOL prediction error, the mean IOL prediction error, the median absolute refractive prediction error, and the percentages of eyes within ±0.50 diopter (D) and ±1.00 D of the predicted refraction were calculated.
The Holladay 2 formula produced a mean arithmetic IOL prediction error significantly different from zero (P = 0.003). Surprisingly, the mean arithmetic IOL prediction errors generated by Shammas, Haigis-L and Barret True K No History formulas were not significantly different from zero (P = 0.14, P = 0.49, P = 0.81, respectively).There were no significant differences in the median absolute refractive prediction error or percentage of eyes within ± 0.50 D or ± 1.00 D of the predicted refraction between formulas or methods.
In eyes with previous hyperopic LASIK/PRK and no prior data, there were no significant differences in the accuracy of IOL power calculation between the Holladay 2 formula and the ASCRS Post-refractive IOL calculator.
比较人工晶状体计算公式，并评估既往远视性角膜屈光手术后患者的术后屈光结果。
回顾性、对比性、观察性研究。
美国马萨诸塞州眼耳医院，哈佛医学院，波士顿，马萨诸塞州。
回顾和分析了 24 例连续患者的 39 只眼的临床图表和光学生物测量数据，这些患者被诊断为既往远视激光矫正和白内障手术后。使用 Holladay 2 公式（Lenstar）和美国白内障和屈光手术学会（ASCRS）后屈光性人工晶状体计算器（版本 4.9，2017 年）对白内障手术后的实际表现屈光等效球镜（MRSE）进行人工晶状体（IOL）功率计算。在任何计算中都没有使用术前 LASIK/PRK 或术后 LASIK/PRK 信息。计算了 IOL 预测误差、平均 IOL 预测误差、中位数绝对屈光预测误差以及预测折射度±0.50 屈光度（D）和±1.00 D 范围内的眼数百分比。
Holladay 2 公式产生的平均算术 IOL 预测误差与零显著不同（P = 0.003）。令人惊讶的是，Shammas、Haigis-L 和 Barret True K No History 公式产生的平均算术 IOL 预测误差与零没有显著差异（P = 0.14、P = 0.49、P = 0.81）。公式或方法之间在中位数绝对屈光预测误差或预测折射度±0.50 D 或±1.00 D 范围内的眼数百分比方面没有显著差异。
在既往远视性 LASIK/PRK 且无既往数据的眼中，Holladay 2 公式和 ASCRS 后屈光性人工晶状体计算器在 IOL 功率计算的准确性方面没有显著差异。
