Accuracy of Intraocular Lens Calculation Formulas in Patients Undergoing Combined Phakic Intraocular Lens Removal and Cataract Surgery
| Autor: | Xiaozhang Qiu, Guangming Jin, Lixia Luo, Miao Zhang, Xiaotong Han, Yizhi Liu, Xiaoyun Chen, Xiaoxun Gu, Zhaoxia Xia, Zhenzhen Liu, Jiaqing Zhang, Xiaoting Ruan, Xuhua Tan, Haowen Lin |
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| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Optics and Photonics Phakic Intraocular Lenses Biometry genetic structures medicine.medical_treatment Mean squared prediction error Emmetropia Intraocular lens Phakic intraocular lens Refraction Ocular Cataract Lens thickness Lens Implantation Intraocular Ophthalmology medicine Humans In patient Retrospective Studies Lenses Intraocular Phacoemulsification business.industry Axial length Cataract surgery eye diseases Axial Length Eye sense organs business |
| Zdroj: | American journal of ophthalmology. 234 |
| ISSN: | 1879-1891 |
| Popis: | To investigate the prediction accuracy of intraocular lens (IOL) calculation formulas, and the impact of anterior chamber depth (ACD) and lens thickness (LT) measurement errors on IOL power calculation in patients undergoing combined phakic IOL (PIOL) removal and cataract surgery.Retrospective, consecutive case series study.Thirty-six PIOL implanted eyes (12 anterior chamber PIOLs and 24 posterior chamber PIOLs [PC-PIOL]) undergoing cataract surgery were included. The prediction accuracy of new formulas (Barrett universal II, Emmetropia verifying optical, Kane, and Ladas super formula) and traditional formulas (Haigis, Hoffer Q, Holladay 1 and SRK/T) with or without Wang-Koch (WK) axial length (AL) adjustment was evaluated. The influence of ACD and LT measurement errors of IOLMaster 700 on refractive outcomes was also investigated.The Kane and traditional formulas with WK AL adjustment had no significant systematic prediction error and displayed a smaller median absolute error, whereas the other formulas showed significant hyperopia shift (P.05) and relatively lower prediction accuracy. The accuracy rate of IOLMaster 700 in measuring the ACD and LT was 100% in eyes with anterior chamber PIOL implantation, and 37.50% in the PC-PIOL subgroup. No significant difference was observed in refractive outcomes of formulas using correct and wrong parameters in the PC-PIOL subgroup (P.05).The Kane and traditional formulas with WK AL adjustment exhibited relatively higher prediction accuracy in patients who underwent combined PIOL removal and cataract surgery. The IOLMaster 700 displayed low accuracy in ACD and LT measurements for PC-PIOL implanted eyes, but showed negligible impact on IOL prediction accuracy. |
| Databáze: | OpenAIRE |
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