144733 20260217205531.0 doi 10.1080/02713683.2024.2378009 sideral 139495 ART-2024-139495 eng Mechó-García, María The influence of accommodative demand on ocular aberrations: a study of Zernike coefficients repeatability and variability 2024 Access copy available to the general public Unrestricted Purpose To evaluate the repeatability of the Zernike coefficients in healthy eyes when monocular accommodation was stimulated at different vergences demands. Methods A total of 36 right eyes from healthy volunteers were prospectively and consecutively recruited for this study. Wavefront aberrometry was conducted to objectively characterize the ocular optical quality during accommodation, from the individual’s far point to a 5 D accommodation demand in steps of 0.5 D. The repeatability of Zernike coefficients up to the fourth order was assessed by calculating the within-eye repeatability (Sw), the coefficient of repeatability (CR), the coefficient of variation (CV), and the intraclass correlation coefficient (ICC) as an indicator of measurement reliability. Results Correlation among repeated measurements showed high reliability (ICC > 0.513) for all parameters measured except some fourth-order Zernike coefficients, C(4, −4) (ICC < 0.766), C(4, −2) (ICC < 0.875), C(4, 2) (ICC < 0.778) and C(4, 4) (ICC < 0.811). Greater repeatability and less variability were obtained for high-order Zernike coefficients (CR < 0.154), although an increase in CR in the coefficients analyzed was observed with increasing accommodative demand. No clear trend was evident in CV; however, it was observed that the low-order Zernike coefficients exhibit lower CV (CV < 1.93) compared to the high-order Zernike coefficients (CV > 0). Conclusions The reliability of Zernike coefficients up to the fourth order in healthy young individuals demonstrated a strong consistency in measuring terms up to the fourth order, with more variability observed for high-order terms. The Zernike coefficients up to the third order exhibited the highest level of repeatability. info:eu-repo/grantAgreement/EC/H2020/956720/EU/Opto-Biomechanical Eye Research Network/OBERON This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 956720-OBERON info:eu-repo/semantics/openAccess by-nc https://creativecommons.org/licenses/by-nc/4.0/deed.es 2.0 2024 OPHTHALMOLOGY 44 / 99 = 0.444 2024 Q2 T2 0.693 2024 Ophthalmology 2024 Q2 Sensory Systems 2024 Q3 Cellular and Molecular Neuroscience 2024 Q3 4.2 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Arcas-Carbonell, María (orcid)0009-0006-7694-8086 Orduna-Hospital, Elvira Universidad de Zaragoza (orcid)0000-0003-2710-1875 Sánchez-Cano, Ana Universidad de Zaragoza (orcid)0000-0002-5621-1937 González-Méijome, José Manuel 2002 647 Universidad de Zaragoza Dpto. Física Aplicada Área Óptica 49, 12 (2024), 1237-1246 Curr. eye res. CURRENT EYE RESEARCH 0271-3683 1682137 http://zaguan.unizar.es/record/144733/files/texto_completo.pdf Versión publicada 1130316 http://zaguan.unizar.es/record/144733/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:144733 articulos driver 2026-02-17-20:32:37 ARTICLE