Comparison of Refractive Prediction Error by Axial Length in Flanged Intrascleral Intraocular Lens Fixation
Yoshiaki Kabata,1 Tetsutaro Oki,1 Tadashi Nakano2 1Department of Ophthalmology, Jikei University School of Medicine, Daisan Hospital, Tokyo, Japan; 2Department of Ophthalmology, The Jikei University School of Medicine, Tokyo, JapanCorrespondence: Yoshiaki Kabata, Department of Ophthalmology, Jikei U...
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| Format: | Article |
| Language: | English |
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Dove Medical Press
2024-03-01
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| Series: | Clinical Ophthalmology |
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| Online Access: | https://www.dovepress.com/comparison-of-refractive-prediction-error-by-axial-length-in-flanged-i-peer-reviewed-fulltext-article-OPTH |
| _version_ | 1797253661661855744 |
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| author | Kabata Y Oki T Nakano T |
| author_facet | Kabata Y Oki T Nakano T |
| author_sort | Kabata Y |
| collection | DOAJ |
| description | Yoshiaki Kabata,1 Tetsutaro Oki,1 Tadashi Nakano2 1Department of Ophthalmology, Jikei University School of Medicine, Daisan Hospital, Tokyo, Japan; 2Department of Ophthalmology, The Jikei University School of Medicine, Tokyo, JapanCorrespondence: Yoshiaki Kabata, Department of Ophthalmology, Jikei University School of Medicine, Daisan Hospital, 4-11-1 Izumihontyou, Komae-si, Tokyo, 125-8506, Japan, Tel +81334801151, Fax +81334805700, Email kabata22122@gmail.comPurpose: To evaluate the refractive prediction error in flanged intrascleral intraocular lens (IOL) fixation using the SRK/T formula and compare the axial length using a single IOL.Methods: Seventy-six eyes from 70 patients (45 males and 25 females) were included in this study. The mean age at the time of surgery was 73.4 ± 12.3 years. The patients underwent flanged IOL fixation using a PN6A (Kowa). All surgeries were performed by two surgeons (Y. K. and T. O.) between Jan 2020 and Dec 2022 at Jikei University Daisan Hospital. IOL power was calculated using the SRK/T formula with IOL Master 700 (Carl Zeiss) as the bag power. The recommended value of 119.0 was used for the A-constant. The actual refractive spherical equivalent was calculated and compared with preoperative predictions. Refractive prediction errors were defined as the deviation of the actual postoperative spherical equivalent refraction in diopters from the predicted preoperative spherical equivalent refraction. The patients were divided into three groups according to axial length: < 22.0 mm (short eyes), 22.0– 24.5 mm (medium eyes), and > 24.5 mm (long eyes), and the refractive prediction errors and mean absolute errors were compared.Results: The mean refractive prediction error was − 0.20 ± 0.52D. The mean absolute error was 0.44 ± 0.33D. The mean refractive prediction errors were not significantly different between the 22.0– 24.5 mm (medium eyes) and > 24.5 mm (long eyes) groups. (P=0.06) The mean absolute errors were not significantly different between the two groups (P=0.10).Conclusion: The SRK/T formula worked well regardless of whether the eyes were medium or long according to the axial length in the flanged intrascleral IOL fixation.Keywords: flanged intrascleral IOL fixation, refractive prediction error, SRK/T formula, axial length |
| first_indexed | 2024-04-24T21:37:37Z |
| format | Article |
| id | doaj.art-af33cf672db843589fc5693e5419a352 |
| institution | Directory Open Access Journal |
| issn | 1177-5483 |
| language | English |
| last_indexed | 2024-04-24T21:37:37Z |
| publishDate | 2024-03-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | Clinical Ophthalmology |
| spelling | doaj.art-af33cf672db843589fc5693e5419a3522024-03-21T17:06:44ZengDove Medical PressClinical Ophthalmology1177-54832024-03-01Volume 1889590091447Comparison of Refractive Prediction Error by Axial Length in Flanged Intrascleral Intraocular Lens FixationKabata YOki TNakano TYoshiaki Kabata,1 Tetsutaro Oki,1 Tadashi Nakano2 1Department of Ophthalmology, Jikei University School of Medicine, Daisan Hospital, Tokyo, Japan; 2Department of Ophthalmology, The Jikei University School of Medicine, Tokyo, JapanCorrespondence: Yoshiaki Kabata, Department of Ophthalmology, Jikei University School of Medicine, Daisan Hospital, 4-11-1 Izumihontyou, Komae-si, Tokyo, 125-8506, Japan, Tel +81334801151, Fax +81334805700, Email kabata22122@gmail.comPurpose: To evaluate the refractive prediction error in flanged intrascleral intraocular lens (IOL) fixation using the SRK/T formula and compare the axial length using a single IOL.Methods: Seventy-six eyes from 70 patients (45 males and 25 females) were included in this study. The mean age at the time of surgery was 73.4 ± 12.3 years. The patients underwent flanged IOL fixation using a PN6A (Kowa). All surgeries were performed by two surgeons (Y. K. and T. O.) between Jan 2020 and Dec 2022 at Jikei University Daisan Hospital. IOL power was calculated using the SRK/T formula with IOL Master 700 (Carl Zeiss) as the bag power. The recommended value of 119.0 was used for the A-constant. The actual refractive spherical equivalent was calculated and compared with preoperative predictions. Refractive prediction errors were defined as the deviation of the actual postoperative spherical equivalent refraction in diopters from the predicted preoperative spherical equivalent refraction. The patients were divided into three groups according to axial length: < 22.0 mm (short eyes), 22.0– 24.5 mm (medium eyes), and > 24.5 mm (long eyes), and the refractive prediction errors and mean absolute errors were compared.Results: The mean refractive prediction error was − 0.20 ± 0.52D. The mean absolute error was 0.44 ± 0.33D. The mean refractive prediction errors were not significantly different between the 22.0– 24.5 mm (medium eyes) and > 24.5 mm (long eyes) groups. (P=0.06) The mean absolute errors were not significantly different between the two groups (P=0.10).Conclusion: The SRK/T formula worked well regardless of whether the eyes were medium or long according to the axial length in the flanged intrascleral IOL fixation.Keywords: flanged intrascleral IOL fixation, refractive prediction error, SRK/T formula, axial lengthhttps://www.dovepress.com/comparison-of-refractive-prediction-error-by-axial-length-in-flanged-i-peer-reviewed-fulltext-article-OPTHflanged intrascleral iol fixationrefractive prediction errorsrk/t formulaaxial length |
| spellingShingle | Kabata Y Oki T Nakano T Comparison of Refractive Prediction Error by Axial Length in Flanged Intrascleral Intraocular Lens Fixation Clinical Ophthalmology flanged intrascleral iol fixation refractive prediction error srk/t formula axial length |
| title | Comparison of Refractive Prediction Error by Axial Length in Flanged Intrascleral Intraocular Lens Fixation |
| title_full | Comparison of Refractive Prediction Error by Axial Length in Flanged Intrascleral Intraocular Lens Fixation |
| title_fullStr | Comparison of Refractive Prediction Error by Axial Length in Flanged Intrascleral Intraocular Lens Fixation |
| title_full_unstemmed | Comparison of Refractive Prediction Error by Axial Length in Flanged Intrascleral Intraocular Lens Fixation |
| title_short | Comparison of Refractive Prediction Error by Axial Length in Flanged Intrascleral Intraocular Lens Fixation |
| title_sort | comparison of refractive prediction error by axial length in flanged intrascleral intraocular lens fixation |
| topic | flanged intrascleral iol fixation refractive prediction error srk/t formula axial length |
| url | https://www.dovepress.com/comparison-of-refractive-prediction-error-by-axial-length-in-flanged-i-peer-reviewed-fulltext-article-OPTH |
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