Studying the added effect of sum-of-segments biometry to modern intraocular lens power calculation formulas for short eyes.

IF 1.7 4区医学 Q3 OPHTHALMOLOGY BMC Ophthalmology Pub Date : 2025-02-12 DOI:10.1186/s12886-025-03896-1

Hany Ahmed Helaly, Mohamed Hassan Elkhawaga, Mohamed Sobhy El-Mansy, Mohamed Sobhy Hassan

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Abstract

Purpose: To study the added effect of sum-of-segments (SOS) biometry to modern intraocular lens power calculation formulas for eyes with short axial length.

Methods: This was a retrospective case series that included 99 eyes from 99 patients. Preoperative AXL measurements were conducted utilizing the ARGOS biometer (Alcon, Inc., Fort Worth, TX). The following formulas were used: Barrett Universal II (BUII), Cooke K6, EVO 2.0, and PEARL-DGS formulas. Additionally, the Barrett formula has been updated and is now incorporated into the ARGOS biometer, introducing the Barrett true axial length (BTAL) formula.

Results: EVO 2.0_sos and PEARL-DGS_sos formulas had the highest cases within ± 0.25 D of the intended refraction (45.45% and 42.42%, respectively). The PEARL-DGS_sos was the only formula to show a myopic mean prediction error (-0.25 ± 0.36 D). The Cooke K6 formula showed the highest hyperopic mean prediction error (0.55 ± 0.35 D), followed by EVO 2.0, Cooke K6_sos, and BUII formulas. BTAL had mean prediction error of 0.15 ± 0.47 which is less hyperopic than BUII (0.43 ± 0.39 D). Subgroup analysis of eyes with AXL 21 mm or shorter (n = 57) was done. Again, the PEARL-DGS_sos formula showed the only myopic mean prediction error (-0.23 ± 0.37 D).

Conclusion: PEARL-DGS_sos was the only formula to show a myopic mean prediction error. Using BTAL and SOS option in Cooke K6, EVO 2.0, and PEARL-DGS formulas decreased the undesirable hyperopic shift in the mean prediction error. This effect was more evident in shorter eyes ≤ 21.0 mm.

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研究分段总和生物测量法对现代短眼眼内透镜功率计算公式的附加作用。

目的：研究短眼轴长人工晶状体度数计算公式中分段和（sum-of-segments， SOS）生物计量的补充作用。方法：这是一个回顾性病例系列，包括99例患者的99只眼睛。术前AXL测量采用ARGOS生物计（Alcon, Inc., Fort Worth， TX）。使用以下配方：Barrett Universal II （BUII）、Cooke K6、EVO 2.0、PEARL-DGS配方。此外，巴雷特公式已经更新，现在纳入ARGOS生物计，引入巴雷特真轴长（BTAL）公式。结果：EVO 2.0sos和PEARL-DGSsos配方在预期屈光度±0.25 D范围内的发生率最高，分别为45.45%和42.42%。PEARL-DGSsos是唯一的近视平均预测误差（-0.25±0.36 D）的公式，Cooke K6公式的远视平均预测误差最大（0.55±0.35 D），其次是EVO 2.0、Cooke K6sos和BUII公式。BTAL的平均预测误差为0.15±0.47，低于BUII的平均预测误差（0.43±0.39 D）。对AXL≤21 mm的眼（n = 57）进行亚组分析。结论：PEARL-DGSsos公式是唯一出现近视平均预测误差的公式（-0.23±0.37 D）。在Cooke K6、EVO 2.0和PEARL-DGS公式中使用BTAL和SOS选项减少了平均预测误差的不良远视偏移。这种效果在≤21.0 mm的短眼中更为明显。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

BMC Ophthalmology OPHTHALMOLOGY-

CiteScore

3.40

自引率

5.00%

发文量

441

审稿时长

6-12 weeks

期刊介绍： BMC Ophthalmology is an open access, peer-reviewed journal that considers articles on all aspects of the prevention, diagnosis and management of eye disorders, as well as related molecular genetics, pathophysiology, and epidemiology.