Tabatabaei Seyed Ali, Samadi Melika, Soleimani Mohammad, Fonoodi Hosein, Ghods Sepideh, Inanloo Bahman
Department of Ocular Trauma and Emergency, Translational Ophthalmology Research Centre, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Taiwan J Ophthalmol. 2022 Apr 13;12(2):164-169. doi: 10.4103/tjo.tjo_1_22. eCollection 2022 Apr-Jun.
The purpose of the study was to determine the most accurate formula for intraocular lens (IOL) power calculation among five currently used formulas in eyes with phacomorphic glaucoma (PG) undergoing cataract extraction surgery.
In this prospective interventional case series Patients diagnosed with PG were undergone uneventful phacoemulsification and IOL implantation. After 3 months, the refractive outcome for each formula was evaluated with mean prediction error (PE), mean absolute error (MAE), and the percentages of eyes within 0.25 D and 0.5 D of predicted error.
Twenty-three patients completed the study. PEs were significantly different among the 5 formulas ( = 0.019), and Holladay I had the least error (-0.02 ± 1.11). Haigis formula had the highest hyperopic shift (0.37 ± 1.22), highest MAE (0.99 ± 0.78) and the lowest percentages of desired PEs, while the SRK II produced the greatest percentages. The overall differences in MAE between the 5 formulas were statistically insignificant ( = 0.547).
In some extreme situations like patients with PG, lower generation of IOL power calculation formulas may still produce more acceptable refractive outcomes.
本研究的目的是确定在接受白内障摘除手术的晶状体溶解性青光眼（PG）患者中，五种当前使用的公式中用于人工晶状体（IOL）屈光度计算的最准确公式。
在这个前瞻性干预性病例系列中，被诊断为PG的患者接受了顺利的超声乳化和IOL植入手术。3个月后，用平均预测误差（PE）、平均绝对误差（MAE）以及预测误差在0.25 D和0.5 D范围内的眼睛百分比来评估每个公式的屈光结果。
23名患者完成了研究。5种公式的PE有显著差异（P = 0.019），Holladay I的误差最小（-0.02±1.11）。Haigis公式的远视偏移最大（0.37±1.22），MAE最高（0.99±0.78），达到期望PE的百分比最低，而SRK II产生的百分比最高。5种公式之间MAE的总体差异无统计学意义（P = 0.547）。
在某些极端情况下，如PG患者，较低代的IOL屈光度计算公式可能仍会产生更可接受的屈光结果。
