Accuracy of the FY-L formula in calculating intraocular lens power after small-incision lenticule extraction
PurposeThe study aimed to assess the accuracy of the FY-L formula in calculating intraocular lens (IOL) power after small-incision lenticule extraction (SMILE).MethodsFor the post-SMILE IOL calculation of the same eye, the IOL power targeting the pre-SMILE eyes' lowest myopic refractive error w...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-08-01
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| Series: | Frontiers in Medicine |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmed.2023.1241824/full |
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| author | Yingfeng Hu Liqun Lin Danqi Zeng Yan Wang Rong Zhang Zhe Zhang Zhe Zhang Zheng Wang Guangbin Zhang Xiangyu Ye Xiangyu Ye |
| author_facet | Yingfeng Hu Liqun Lin Danqi Zeng Yan Wang Rong Zhang Zhe Zhang Zhe Zhang Zheng Wang Guangbin Zhang Xiangyu Ye Xiangyu Ye |
| author_sort | Yingfeng Hu |
| collection | DOAJ |
| description | PurposeThe study aimed to assess the accuracy of the FY-L formula in calculating intraocular lens (IOL) power after small-incision lenticule extraction (SMILE).MethodsFor the post-SMILE IOL calculation of the same eye, the IOL power targeting the pre-SMILE eyes' lowest myopic refractive error was used. The FY-L formula, the Emmetropia Verifying Optical Formula (EVO-L), the Barrett True-K no history, and the Shammas-L, respectively, were used to calculate the predicted refractive error of target IOL power. A comparison was made between the change in spherical equivalent induced by SMILE (SMILE-Dif) and the variance between IOL-Dif (IOL-Induced Refractive Error) before and after SMILE. The prediction error (PE) was defined as SMILE-Dif minus IOL-Dif. The proportion of eyes with PEs within ±0.25 D, ±0.50 D, ±0.75 D, and ±1.00 D, the numerical and absolute prediction errors (PEs and AEs), and the median absolute error (MedAE) were compared.ResultsIn total, 80 eyes from 42 patients who underwent SMILE were included in the study. The FY-L formula generated the sample's lowest mean PE (0.06 ± 0.76 D), MAE (0.58 ± 0.50 D), and MedAE (0.47 D), respectively. The PEs in ±0.25 D, ±0.50 D, ±0.75 D, and ±1.00 D comprised 28.8%, 46.3%, 70.0%, and 87.5%, respectively, for the FY-L formula. Compared to other formulas, the FY-L formula produced the highest value with PEs for the percentage of eyes in ±0.50 D, ±0.75 D, and ±1.00 D.ConclusionThis study demonstrates that the FY-L formula provides satisfactory outcomes in estimating the IOL power in the eyes after SMILE. |
| first_indexed | 2024-03-12T13:30:44Z |
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| id | doaj.art-aed19c7a0c674443b46d70ee14cd10ad |
| institution | Directory Open Access Journal |
| issn | 2296-858X |
| language | English |
| last_indexed | 2024-03-12T13:30:44Z |
| publishDate | 2023-08-01 |
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| series | Frontiers in Medicine |
| spelling | doaj.art-aed19c7a0c674443b46d70ee14cd10ad2023-08-24T14:17:39ZengFrontiers Media S.A.Frontiers in Medicine2296-858X2023-08-011010.3389/fmed.2023.12418241241824Accuracy of the FY-L formula in calculating intraocular lens power after small-incision lenticule extractionYingfeng Hu0Liqun Lin1Danqi Zeng2Yan Wang3Rong Zhang4Zhe Zhang5Zhe Zhang6Zheng Wang7Guangbin Zhang8Xiangyu Ye9Xiangyu Ye10Fuzhou Eye Hospital, Fuzhou, Fujian, ChinaXianyou County General Hospital, Putian, Fujian, ChinaXiamen Eye Center, Xiamen University, Xiamen, Fujian, ChinaFuzhou Eye Hospital, Fuzhou, Fujian, ChinaFuzhou Eye Hospital, Fuzhou, Fujian, ChinaShenzhen Eye Hospital, Jinan University, Shenzhen, Guangdong, ChinaShenzhen Eye Institute, Shenzhen, Guangdong, ChinaFuzhou Eye Hospital, Fuzhou, Fujian, ChinaXiamen Eye Center, Xiamen University, Xiamen, Fujian, ChinaFuzhou Eye Hospital, Fuzhou, Fujian, ChinaXiamen Eye Center, Xiamen University, Xiamen, Fujian, ChinaPurposeThe study aimed to assess the accuracy of the FY-L formula in calculating intraocular lens (IOL) power after small-incision lenticule extraction (SMILE).MethodsFor the post-SMILE IOL calculation of the same eye, the IOL power targeting the pre-SMILE eyes' lowest myopic refractive error was used. The FY-L formula, the Emmetropia Verifying Optical Formula (EVO-L), the Barrett True-K no history, and the Shammas-L, respectively, were used to calculate the predicted refractive error of target IOL power. A comparison was made between the change in spherical equivalent induced by SMILE (SMILE-Dif) and the variance between IOL-Dif (IOL-Induced Refractive Error) before and after SMILE. The prediction error (PE) was defined as SMILE-Dif minus IOL-Dif. The proportion of eyes with PEs within ±0.25 D, ±0.50 D, ±0.75 D, and ±1.00 D, the numerical and absolute prediction errors (PEs and AEs), and the median absolute error (MedAE) were compared.ResultsIn total, 80 eyes from 42 patients who underwent SMILE were included in the study. The FY-L formula generated the sample's lowest mean PE (0.06 ± 0.76 D), MAE (0.58 ± 0.50 D), and MedAE (0.47 D), respectively. The PEs in ±0.25 D, ±0.50 D, ±0.75 D, and ±1.00 D comprised 28.8%, 46.3%, 70.0%, and 87.5%, respectively, for the FY-L formula. Compared to other formulas, the FY-L formula produced the highest value with PEs for the percentage of eyes in ±0.50 D, ±0.75 D, and ±1.00 D.ConclusionThis study demonstrates that the FY-L formula provides satisfactory outcomes in estimating the IOL power in the eyes after SMILE.https://www.frontiersin.org/articles/10.3389/fmed.2023.1241824/fullintraocular lens power calculationFY-L formulaaccuracytheoretical modelsmall-incision lenticule extraction |
| spellingShingle | Yingfeng Hu Liqun Lin Danqi Zeng Yan Wang Rong Zhang Zhe Zhang Zhe Zhang Zheng Wang Guangbin Zhang Xiangyu Ye Xiangyu Ye Accuracy of the FY-L formula in calculating intraocular lens power after small-incision lenticule extraction Frontiers in Medicine intraocular lens power calculation FY-L formula accuracy theoretical model small-incision lenticule extraction |
| title | Accuracy of the FY-L formula in calculating intraocular lens power after small-incision lenticule extraction |
| title_full | Accuracy of the FY-L formula in calculating intraocular lens power after small-incision lenticule extraction |
| title_fullStr | Accuracy of the FY-L formula in calculating intraocular lens power after small-incision lenticule extraction |
| title_full_unstemmed | Accuracy of the FY-L formula in calculating intraocular lens power after small-incision lenticule extraction |
| title_short | Accuracy of the FY-L formula in calculating intraocular lens power after small-incision lenticule extraction |
| title_sort | accuracy of the fy l formula in calculating intraocular lens power after small incision lenticule extraction |
| topic | intraocular lens power calculation FY-L formula accuracy theoretical model small-incision lenticule extraction |
| url | https://www.frontiersin.org/articles/10.3389/fmed.2023.1241824/full |
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