Predictability of 6 Intraocular Lens Power Calculation Formulas in People With Very High Myopia

Frontiers in Medicine

article

Yi-Ching Chu¹  Tzu-Lun Huang¹  Pei-Yao Chang¹  Wei-Ting Ho¹  Yung-Ray Hsu¹  Shu-Wen Chang¹  Jia-Kang Wang¹ 

[1] Department of Ophthalmology, Far Eastern Memorial Hospital;Department of Electrical Engineering, Yuan Ze University;Department of Medicine, National Taiwan University;School of Medicine, National Yang Ming Chiao Tung University, Hsinchu;Department of Healthcare Administration and Department of Nursing, Oriental Institute of Technology

关键词: optical biometry;    intraocular lens;    power calculation formulas;    extremely high myopia;    long axial length;   

DOI  :  10.3389/fmed.2022.762761

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

Purpose To investigate the accuracy of 6 intraocular lens (IOL) power calculation formulas in predicting refractive outcomes in extremely long eyes. Setting Department of Ophthalmology, Far Eastern Memorial Hospital, Taiwan. Design Retrospective comparative study. Methods In this retrospective single-center study, we reviewed 70 eyes of 70 patients with axial length (AL) ≥ 28 mm who had received an uneventful 2.2 mm corneal wound phacoemulsification and in-the-bag IOL placement. The actual postoperative refractive results were compared to the predicted refraction calculated with 6 formulas (Haigis, Hoffer Q, Holladay 1, SRK/T, T2, Barrett Universal II formulas) using IOLMaster 500 as optical biometry in the User Group for Laser Interference Biometry (ULIB) constants. Results Overall, the Haigis and Barrett formulas achieved the lowest level of mean prediction error (PE) and median absolute error (MedAE). Hoffer Q, Holladay 1, SRK/T, and T2 had hyperopic prediction errors ( p < 0.05). The Hoffer Q and Holladay 1 had significantly more MedAE between the 6 formulas. After the mean PE was zeroed out, the MedAE had no significant difference between each group. The absolute error tends to be larger in patients with longer AL. The absolute errors were 30.0–37.1% and 60.0–64.3% within 1.0 D of all patients compared to predicted refraction calculated using various formulas. Conclusion The Haigis and Barrett Universal II formulas had a better success rate in predicting IOL power in high myopic eyes with AL longer than 28 mm using the ULIB constant in this study. The postoperative refractive results were inferior to the benchmark standards, which indicated that the precision of IOL power calculation in patients with high myopia still required improvement.

【 授权许可】

CC BY