2026-05-05T11:18:59Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/751742025-02-27T20:00:46Zcom_10324_1138com_10324_931com_10324_894col_10324_1226

Reliability and agreement of apparent chord mu measurements between static and dynamic evaluations Martínez Plaza, Elena Marcos, Mario López De La Rosa, Alberto López Miguel, Alberto Maldonado López, Miguel José Chord mu Scheimpflug and Placido-disk technology repeatability agreement Purpose: To assess the repeatability and agreement of Cartesian coordinates and the length of apparent chord mu and pupil diameter measurements during static (Galilei G4) and dynamic (Topolyzer Vario) evaluations. Setting: IOBA-Eye Institute, Valladolid, Spain. Design: Case series. Methods: 3 consecutive measurements per scenario (Galilei G4 and Topolyzer Vario under low mesopic and photopic conditions) were performed by the same clinician. The intrasession repeatability was assessed using the within-subject SD (Sw), the precision, the coefficient of variation, and the intraclass correlation coefficient (ICC). The agreement was analyzed using repeated-measures analysis of variance and the Bland-Altman method. Results: Thirty-seven healthy participants were recruited. The Sw values for chord mu parameters and pupil diameter ranged from 0.01 to 0.03 and 0.08 to 0.21, respectively. The ICC was ≥0.89 for all parameters. Galilei G4 and Topolyzer Vario under low mesopic and photopic conditions provided significantly different measures of apparent chord mu length (0.23 ± 0.11 mm, 0.30 ± 0.10 mm, and 0.25 ± 0.11 mm, respectively, P ≤ .02), X-coordinate (-0.18 ± 0.12 mm, -0.27 ± 0.11 mm, and -0.21 ± 0.12 mm, respectively, P < .001), and pupil diameter (3.38 ± 0.50 mm, 6.29 ± 0.60 mm, and 3.04 ± 0.41 mm, respectively, P < .001). Y-coordinate values obtained by Galilei G4 and Topolyzer Vario under low mesopic conditions were significantly different (0.06 ± 0.13 mm vs 0.03 ± 0.11 mm, respectively, P = .02), in contrast to Galilei G4 and Topolyzer Vario under photopic conditions (0.05 ± 0.13 mm, P = .82) and both illumination conditions of Topolyzer Vario (P ≥ .23). Conclusions: Galilei G4 and Topolyzer Vario provide consistent measurements of apparent chord mu Cartesian coordinates and length, as well as pupil diameter; however, the measurements are not interchangeable. Ophthalmic surgeons should consider these findings when planning customized intraocular lens implantation and refractive surgery procedures. 2025-02-27T12:20:19Z 2025-02-27T12:20:19Z 2023 info:eu-repo/semantics/article info:eu-repo/semantics/draft Journal of Cataract & Refractive Surgery, 2023, vol. 49, n. 1, p. 21-28. 0886-3350 https://uvadoc.uva.es/handle/10324/75174 10.1097/j.jcrs.0000000000001036 21 1 28 Journal of Cataract and Refractive Surgery 49 1873-4502 eng https://journals.lww.com/jcrs/abstract/2023/01000/reliability_and_agreement_of_apparent_chord_mu.6.aspx Atribución-NoComercial-SinDerivados 4.0 Internacional info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf https://uvadoc.uva.es/bitstream/10324/75174/3/Reliability%20and%20agreement%20of%20apparent%20Chord%20mu%20measurements%20with%20Galilei%20G4.pdf.jpg Hispana TEXT https://creativecommons.org/licenses/by-nc-nd/4.0/ UVaDOC. Repositorio Documental de la Universidad de Valladolid https://uvadoc.uva.es/handle/10324/75174