Journal of cataract and refractive surgery · 2026
Refractive prediction error after intrascleral intraocular lens fixation in eyes with long axial length.
СтатьяНаблюдательное исследованиеНазвание и аннотация: Перевод пока не подготовлен
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Suzue Masaki, Goto So, Sakimoto Susumu, Nakao Gen, Shiraki Akihiko, Nishida Kentaro, Maruyama Kazuichi, Sato Shigeru, Maeno Takatoshi, Nishida Kohji
Аннотация
PURPOSE: To evaluate the refractive prediction accuracy of intraocular lens (IOL) power calculation formulas after flanged intrascleral IOL fixation (SF-IOL; Yamane technique) in long axial length (AL) eyes.
SETTING: University of Osaka Hospital, Osaka, Japan.
DESIGN: Retrospective observational cohort study.
METHODS: Eyes undergoing SF-IOL between January 2023 and April 2024 were classified into normal (N, <26.0 mm) and long (L, ≥26.0 mm) AL groups. Barrett Universal II, Hoffer Q, Holladay 1, and SRK/T were evaluated. Prediction error (PE) was defined as 3-month postoperative spherical equivalent minus predicted value. Prediction accuracy was assessed using root mean square absolute error (RMSAE) and the Formula Performance Index (FPI).
RESULTS: 53 eyes from 50 patients were analyzed (N = 35; L = 18). Mean AL was 24.6 ± 0.8 mm (N) and 27.1 ± 1.0 mm (L). Mean PE (N and L) was -0.55 ± 0.72 diopters (D) and -0.64 ± 0.62 D with Barrett Universal II ( P = .52), -0.68 ± 0.77 D and -0.45 ± 0.62 D with Hoffer Q ( P = .32), -0.78 ± 0.74 D and -0.31 ± 0.72 D with Holladay 1 ( P = .043), and -0.74 ± 0.72 D and -0.62 ± 0.72 D with SRK/T ( P = .60). In the L group, Holladay 1 showed PE nearest zero; however, demonstrated steep AL-PE regression slope and low FPI. Barrett Universal II yielded the lowest RMSAE and the highest FPI.
CONCLUSIONS: Barrett Universal II demonstrated the highest overall predictive accuracy in long AL eyes undergoing SF-IOL. Although Holladay 1 produced a smaller PE in long AL, this reflected systematic offset rather than superior accuracy, as indicated by its lower FPI.
SETTING: University of Osaka Hospital, Osaka, Japan.
DESIGN: Retrospective observational cohort study.
METHODS: Eyes undergoing SF-IOL between January 2023 and April 2024 were classified into normal (N, <26.0 mm) and long (L, ≥26.0 mm) AL groups. Barrett Universal II, Hoffer Q, Holladay 1, and SRK/T were evaluated. Prediction error (PE) was defined as 3-month postoperative spherical equivalent minus predicted value. Prediction accuracy was assessed using root mean square absolute error (RMSAE) and the Formula Performance Index (FPI).
RESULTS: 53 eyes from 50 patients were analyzed (N = 35; L = 18). Mean AL was 24.6 ± 0.8 mm (N) and 27.1 ± 1.0 mm (L). Mean PE (N and L) was -0.55 ± 0.72 diopters (D) and -0.64 ± 0.62 D with Barrett Universal II ( P = .52), -0.68 ± 0.77 D and -0.45 ± 0.62 D with Hoffer Q ( P = .32), -0.78 ± 0.74 D and -0.31 ± 0.72 D with Holladay 1 ( P = .043), and -0.74 ± 0.72 D and -0.62 ± 0.72 D with SRK/T ( P = .60). In the L group, Holladay 1 showed PE nearest zero; however, demonstrated steep AL-PE regression slope and low FPI. Barrett Universal II yielded the lowest RMSAE and the highest FPI.
CONCLUSIONS: Barrett Universal II demonstrated the highest overall predictive accuracy in long AL eyes undergoing SF-IOL. Although Holladay 1 produced a smaller PE in long AL, this reflected systematic offset rather than superior accuracy, as indicated by its lower FPI.