Biometric Factors in the VRF-G Formula for IOL Power Calculation
Oleksiy V Voytsekhivskyy,1 Amit Biran,2 Eliya Levinger,2 Tal Yahalomi,3 Yakov Vega,4 Uri Elbaz,5 Asaf Achiron2 1Department of Corneal Pathology, Ophthalmic Oncology and Oculoplasty, Kyiv Clinical Ophthalmology Hospital Eye Microsurgery Center, Kyiv, Ukraine; 2Department of Ophthalmology, Tel Aviv So...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Dove Medical Press
2025-07-01
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| Series: | Clinical Ophthalmology |
| Subjects: | |
| Online Access: | https://www.dovepress.com/biometric-factors-in-the-vrf-g-formula-for-iol-power-calculation-peer-reviewed-fulltext-article-OPTH |
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| Summary: | Oleksiy V Voytsekhivskyy,1 Amit Biran,2 Eliya Levinger,2 Tal Yahalomi,3 Yakov Vega,4 Uri Elbaz,5 Asaf Achiron2 1Department of Corneal Pathology, Ophthalmic Oncology and Oculoplasty, Kyiv Clinical Ophthalmology Hospital Eye Microsurgery Center, Kyiv, Ukraine; 2Department of Ophthalmology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel; 3Department of Ophthalmology, Samson Assuta Ashdod Hospital and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Be’er Sheva, Israel; 4Department of Ophthalmology, Sheba Medical Center, Ramat-Gan and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel; 5Department of Ophthalmology, Rabin Medical Center, Petach-Tikva and Sackler School of Medicine, Tel Aviv University, Tel Aviv, IsraelCorrespondence: Oleksiy V Voytsekhivskyy, Department of Corneal Pathology, Ophthalmic Oncology and Oculoplasty, Kyiv Clinical Ophthalmology Hospital Eye Microsurgery Center, Komarov Ave. 3, Medical City, Kyiv, 03680, Ukraine, Tel +38067-584-28-11, Email iolpower@ukr.netPurpose: To assess the contribution of each optional parameter to the IOL power calculation and evaluate the effect of omitting biometric variables (ACD, LT, WTW) using the VRF-G formula.Methods: A total of 501 eyes from 501 consecutive patients included in the study underwent cataract surgery with in-the-bag implantation of one-piece soft hydrophobic acrylic posterior chamber IOLs, AcrySof IQ SN60WF (Alcon Labs, Fort Worth, TX, USA). The primary calculation comprised five measured variables, and IOL power was recalculated for different combinations of omitting ACD, LT, and WTW. Outcome measurements included the difference in IOL power calculations between different omission combinations.Results: Omitting any of the biometric variables resulted in a significant difference in the mean difference in IOL power calculation (ranging from 0.029 to 0.108 diopters), except for WTW omission alone (0.002 diopters). ACD proved to have the most impact, with its omission resulting in larger differences in power calculations (range: 0.177– 0.248 diopters) compared to combinations where ACD was not omitted (range: 0.057– 0.141 diopters). The shortest eyes were most affected by ACD omission.Conclusion: The study highlights the importance of ACD in IOL power calculations, particularly for shorter eyes. WTW and LT were found to be less important when using the VRF-G formula for IOL power calculations.Keywords: IOL power, formulas, VRF-formula, calculation, axial length |
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| ISSN: | 1177-5483 |