Accuracy of newer intraocular lens power formulas in short and long eyes using sum-of-segments biometry. Issue 10 (27th October 2022)

• Record Type: Journal Article
• Authors: Shammas, H. John; Taroni, Leonardo; Pellegrini, Marco; Shammas, Maya C.; Jivrajka, Renu V.
• Is Part Of: Journal of cataract and refractive surgery. Volume 48:Issue 10(2022)
• Page Start: 1113
• Page End: 1120
• Publication Date: 2022-10-27
• Subjects: 617.7
• DOI: 10.1097/j.jcrs.0000000000000958
• Languages: English
• ISSNs: 0886-3350

Abstract

Abstract : The best overall results with the sum-of-segments biometry were noted with the B II, BTAL, EVO, Hoffer QST, K6, Kane, Olsen, and PEARL-DGS formulas. Abstract : Purpose: To analyze the accuracy of newer intraocular lens power formulas in long and short eyes measured using the sum-of-segments biometry. Setting: Private practice, Lynwood, California. Design: Retrospective observational study. Methods: 595 patients scheduled for cataract surgery had their eyes measured using the sum-of-segments biometry. The expected residual refractions were calculated using Barrett Universal II (B II), Barrett True Axial Length (BTAL), Emmetropia Verifying Optical (EVO), Hill-RBF, Hoffer QST, Holladay 2, Holladay 2-NLR, K6, Kane, Olsen, PEARL-DGS, T2, and VRF formulas and compared with the traditional Haigis, Hoffer Q, Holladay 1, and SRK/T formulas. Results: In the 102 long eyes, all new formulas had a mean absolute error (MAE) equal or lower than the traditional formulas, ranging from 0.29 to 0.32 diopter (D). In the 78 short eyes, BTAL, EVO, Hoffer QST, K6, Olsen, and PEARL-DGS formulas had the lowest MAE (0.33 D, 0.33 D, 0.31 D, 0.36 D, 0.32 D, and 0.32 D, respectively), whereas all traditional formulas exceeded 0.36 D. Conclusions: All new formulas performed equal or better than the traditional formulas with the sum-of-segments biometry. The best overall results in the short and long eyes as well as in the very short and very long eyes were noted with the BTAL, EVO, Hoffer QST, K6, Olsen, and PEARL-DGS formulas, closely followed by the B II and Kane formulas.