眼科 ›› 2023, Vol. 32 ›› Issue (6): 483-487.doi: 10.13281/j.cnki.issn.1004-4469.2023.06.006

• 论著 • 上一篇    下一篇

浅前房对人工晶状体计算公式预测屈光误差的影响

线金锥  郭娟  邹燕红   

  1. 清华大学第一附属医院(北京华信医院)眼科,北京100016
  • 收稿日期:2023-03-13 出版日期:2023-11-25 发布日期:2023-11-25
  • 通讯作者: 邹燕红,Email:zouyh@mail.tsinghua.edu.cn

The effect of shallow chamber depth on the prediction error of different intraocular lens calculation formulas 

Xian Jinzhui, Guo Juan, Zou Yanhong   

  1. The First Hospital of Tsinghua University, Beijing, 100016, China
  • Received:2023-03-13 Online:2023-11-25 Published:2023-11-25
  • Contact: Zou Yanhong, Email: zouyh@mail.tsinghua.edu.cn

摘要: 目的 分析浅前房对不同人工晶状体(intraocular lens,IOL)计算公式预测屈光误差的影响。设计 回顾性观察性研究。研究对象 2019年1月1日至2021年12月31日在清华大学第一附属医院接受白内障手术,并囊袋内植入单焦非球面一片式IOL的连续病例176例(176眼)。方法 所有患者术前测量术眼眼轴长度(axial length,AL)、角膜曲率及前房深度(aqueous depth,AD)。根据前房深度,将患者分为浅前房组(AD<2.5 mm)及非浅前房组(AD≥2.5 mm);再将浅前房的患者进一步分为短眼轴组(AL<22.0 mm)及非短眼轴组(AL≥22.0 mm)。术后1~3个月进行验光,验光结果与术前使用SRK/T、Hoffer Q、Haigis、Barrett 4种公式计算的预测屈光值进行比较。主要指标 术后IOL度数的预测屈光误差(prediction error,PE)和绝对预测屈光误差(absolute prediction error,AE)。结果 四个公式的PE值在浅前房组中有统计学差异(P<0.001),而在非浅前房组中无统计学差异(P=0.438)。浅前房组中不同公式的PE比较,Haigis公式(0.00±0.41)D与Barrett公式(0.04±0.41)D较SRK/T公式(-0.18±0.45)D和Hoffer Q公式(-0.21±0.41)D小(P<0.05),Haigis与Barrett公式之间无明显差异(P=0.614)。在浅前房短眼轴组内,PE在SRK/T公式(-0.41±0.56)D和Hoffer Q公式(-0.45±0.44)D公式中呈明显的近视漂移,与Haigis公式(0.05±0.42)D相差可以达到0.50 D(P<0.05)。同一公式自身组间对比:浅前房的情况下,PE在SRK/T与Hoffer Q公式出现近视漂移[P(SRK/T)=0.031,P(Hoffer Q)<0.001]。不同公式的AE值在浅前房组(P=0.393)及非浅前房组(P=0.369)均无统计学差异,组间对比也无统计学差异(P>0.05)。浅前房组内,SRK/T公式(P=0.044)和Hoffer Q公式(P=0.02)短眼轴组较非短眼轴组的AE更大。AE在0.50D范围内的比例,浅前房短眼轴组各公式间差异较大(Haigis公式90%,Hoffer Q公式仅50%),但无统计学意义(P=0.098)。Logistic回归分析显示,术前角膜越陡峭(OR=1.71)、眼轴越长(OR=2.03),前房越浅(OR=0.327),SRK/T公式的AE>0.50 D的概率越大;而Barrett、Haigis、Hoffer Q公式与这3个因素的相关性不显著。结论 在浅前房患者中,Haigis和Barrett公式预测的准确性较SRK/T和Hoffer Q公式高,推荐临床使用。(眼科,2023,32: 483-487)

关键词: 白内障, 浅前房, 屈光误差, 人工晶状体

Abstract: Objective To investigate the effect of shallow aqueous depth (AD) on the prediction error of four different intraocular lens (IOL) calculation formulas. Design Retrospective observational study. Participants A total of 176 cataract patients (176 eyes) who had cataract surgery with single focus IOL in-the-bag implantation from the First Hospital of Tsinghua University from Jan 1st, 2019 to Dec. 31th, 2021. Methods Axial length (AL), corneal curvature and AD were measured before operation. Patients were divided into shallow AD group (AD<2.5 mm) and non-shallow AD group (AD≥2.5 mm) according to AD. And the shallow AD group was further divided into short AL (AL<22.0 mm) and normal AL (AL≥22.0 mm) subgroups. Manifest refraction results were collected 1 to 3 months after operation to calculate the postoperative prediction errors of SRK/T, Hoffer Q, Haigis and Barrett formulas. Main Outcome Measures The prediction error (PE) and absolute prediction error (AE) of IOL values after operation. Results The difference of PE of 4 formulas was statistically significant (P<0.001) in the shallow AD group, while not in the non-shallow AD group (P=0.438). In the shallow AD group,the PE of Haigis (0.00±0.41) D and Barrett (0.04±0.41) D were smaller than that of SRK/T (-0.18±0.45) D and Hoffer Q (-0.21±0.41) D (P<0.05), there were no significant difference in the PE between Haigis and Barrett (P=0.614). In the shallow AD short AL group, the PE of SRK/T (-0.41±0.56) D and Hoffer Q (-0.45±0.44) D tended towards nearly a 0.50 D myopic shift which was statistically different from Haigis [(0.05±0.42) D, P<0.05]. Compared with itself, the PE of SRK/T and Hoffer Q tended towards a myopic shift under the influence of shallow AD [P(SRK/T) =0.031, P(Hoffer Q) <0.001]. There was no significant difference in the AE of different formulas within the group (the shallow AD group, P=0.393, and non-shallow AD group, P=0.369) nor between (P>0.05). In the shallow AD group, AE of SRK/T (P=0.044) and Hoffer Q (P=0.02) was statistically bigger in the short AL group. In the shallow AD short AL group, the percentage of AE within 0.50 D was 90% of Haigis, and only 50% of Hoffer Q without statistically difference (P=0.098). Through Logistic regression analysis, only SRK/T was found a greater possibility to get a >0.50 D AE with a steeper cornea (OR 1.71), a longer AL (OR 2.03) and a shallower AD (OR 0.327). Conclusions In patients with shallow AD, Haigis and Barrett formulas had more accurate predictions than SRK/T and Hoffer Q formulas. These two formulas were recommended in clinical practice. (Ophthalmol CHN, 2023, 32: 483-487)

Key words: cataract, shallow anterior chamber, refractive error, intraocular lens