Comparison of Hill Radial Basis Activation Function-2, Barrett Universal II, and Ladas Super Formula Intraocular Lens Power Calculation Formulas
Journal of Ophthalmic and Optometric Sciences,
Vol. 7 No. 4 (2023),
23 September 2023
,
Page 12-18
https://doi.org/10.22037/joos.v7i4.47445
Abstract
Purpose: This study aimed to compare the predictability and accuracy of different formulas for calculating the power of Tecnis ZCB00 intraocular lenses (IOLs) in patients undergoing cataract surgery.
Patients and Methods: A retrospective comparative analysis was conducted at Basir Eye Clinic, Tehran, Iran, involving 491 eyes of 491 patients who underwent cataract surgery with Tecnis ZCB00 IOL insertion. Biometry data were entered into calculators for SRK/T, Hill Radial Basis Activation Function-2 (Hill RBF- 2), Barrett Universal II, and Ladas Super Formula. Tecnis ZCB00 IOL was implanted for all patients with the power calculated by SRK/T formula. The mean refractive prediction error was compared between Hill RBF- 2, Barrett Universal II, and Ladas Super Formula.
Results: The mean refractive prediction error when considering the IOL power calculations using the Ladas Super Formula, Hill RBF-2, and Barrett Universal II were 1.07 ± 1.11, 0.97 ± 0.82, 1.21 ± 1.04, respectively (P < 0.01). Also, there was a significant difference between the formulas when accessing patients with short axial length (worst results with Barrett Universal II, P < 0.01), medium axial length (best results with Hill RBF-2, P < 0.01) and long axial length (worst results with Barrett Universal II, P < 0.01).
Conclusion: For TECNIS® ZCB00 IOLs, the calculation of IOL power yielded the highest mean refractive prediction error with the Barrett Universal II formula.
- Intra Ocular Lens
- Power Calculation
- TECNIS® ZCB00
- Cataract Surgery
- Predictability
- Accuracy
How to Cite
References
Congdon N, O'Colmain B, Klaver CC, Klein R, Muñoz B, Friedman DS, et al. Causes and prevalence of visual impairment among adults in the United States. Arch Ophthalmol. 2004;122(4):477-85.
Javitt JC, Steinert RF. Cataract extraction with multifocal intraocular lens implantation: a multinational clinical trial evaluating clinical, functional, and quality-of-life outcomes. Ophthalmology. 2000;107(11):2040-8.
Grzybowski A. Recent developments in cataract surgery. Ann Transl Med. 2020;8(22):1540.
Langenbucher A, Szentmáry N, Leydolt C, Cayless A, Schwarzenbacher L, Zsolt Nagy Z, et al. Calculation of ocular magnification in phakic and pseudophakic eyes based on anterior segment OCT data. Ophthalmic Physiol Opt. 2021;41(4):831-41.
Khoramnia R, Auffarth G, Łabuz G, Pettit G, Suryakumar R. Refractive Outcomes after Cataract Surgery. Diagnostics (Basel). 2022;12(2):243.
Xia T, Martinez CE, Tsai LM. Update on Intraocular Lens Formulas and Calculations. Asia Pac J Ophthalmol (Phila). 2020;9(3):186-93.
Karkhur S, Soni D, Sharma B. Commentary: Newer insights into methods of intraocular lens power calculation. Indian J Ophthalmol. 2020;68(6):1079-80.
Retzlaff JA, Sanders DR, Kraff MC. Development of the SRK/T intraocular lens implant power calculation formula. J Cataract Refract Surg. 1990;16(3):333-40.
Sheard RM, Smith GT, Cooke DL. Improving the prediction accuracy of the SRK/T formula: the T2 formula. J Cataract Refract Surg. 2010;36(11):1829-34.
Gökce SE, Zeiter JH, Weikert MP, Koch DD, Hill W, Wang L. Intraocular lens power calculations in short eyes using 7 formulas. J Cataract Refract Surg. 2017;43(7):892-7.
Vega Y, Gershoni A, Achiron A, Tuuminen R, Weinberger Y, Livny E, et al. High Agreement between Barrett Universal II Calculations with and without Utilization of Optional Biometry Parameters. J Clin Med. 2021;10(3):542.
Fedorov SN, Kolinko AI, Kolinko AI. A method of calculating the optical power of the intraocular lens. Vestn Oftalmol. 1967;80(4):27-31. (Article in Russian)
El-Nafees R, Moawad A, Kishk H, Gaafar W. Intra-ocular lens power calculation in patients with high axial myopia before cataract surgery. Saudi J Ophthalmol. 2010;24(3):77-80.
Carmona González D, Palomino Bautista C. Accuracy of a new intraocular lens power calculation method based on artificial intelligence. Eye (Lond). 2021;35(2):517-22.
Faramarzi A, Aghajani A, Ghiasian L. Accuracy of Various Intraocular Lens Power Calculation Formulas in Steep Corneas. J Ophthalmic Vis Res. 2017;12(4):385-9.
Jeong J, Song H, Lee JK, Chuck RS, Kwon JW. The effect of ocular biometric factors on the accuracy of various IOL power calculation formulas. BMC Ophthalmol. 2017 2;17(1):62.
Mori Y, Minami K, Tokuda S, Lee J, Miyata K. Effect of the ratio of axial length to keratometry on SRK/T intraocular lens power calculations for eyes with long axial lengths. Sci Rep. 2019;9(1):19515.
Kaur S, Sukhija J, Ram J. Intraocular lens power calculation formula in congenital cataracts: Are we using the correct formula for pediatric eyes? Indian J Ophthalmol. 2021;69(12):3442-5.
Ladas JG, Siddiqui AA, Devgan U, Jun AS. A 3-D "Super Surface" Combining Modern Intraocular Lens Formulas to Generate a "Super Formula" and Maximize Accuracy. JAMA Ophthalmol. 2015;133(12):1431-6.
Roberts TV, Hodge C, Sutton G, Lawless M, contributors to the Vision Eye Institute IOL outcomes registry. Comparison of Hill-radial basis function, Barrett Universal and current third generation formulas for the calculation of intraocular lens power during cataract surgery. Clin Exp Ophthalmol. 2018;46(3):240-6.
Kane JX, Van Heerden A, Atik A, Petsoglou C. Accuracy of 3 new methods for intraocular lens power selection. J Cataract Refract Surg. 2017;43(3):333-9.
Aristodemou P, Knox Cartwright NE, Sparrow JM, Johnston RL. Intraocular lens formula constant optimization and partial coherence interferometry biometry: Refractive outcomes in 8108 eyes after cataract surgery. J Cataract Refract Surg. 2011;37(1):50-62.
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