000162139 001__ 162139 000162139 005__ 20251017144644.0 000162139 0247_ $$2doi$$a10.1016/j.optom.2025.100568 000162139 0248_ $$2sideral$$a144727 000162139 037__ $$aART-2025-144727 000162139 041__ $$aeng 000162139 100__ $$aLockett-Ruiz, Veronica 000162139 245__ $$aEffect of gradient-index lenses on the optical performance of SyntEyes 000162139 260__ $$c2025 000162139 5060_ $$aAccess copy available to the general public$$fUnrestricted 000162139 5203_ $$ahis study analyzes the effect of two different gradient index (GRIN) crystalline lens models on ocular optical performance compared to that of a homogeneous lens. Using the biometric data of 200 SyntEyes (synthetically generated eyes), we implemented three lens models: homogeneous, GRIN, and GRINCU (gradient index and gradient curvature of the isoindicial surfaces). Using the three lens models, we conducted finite ray tracing on the SyntEyes samples, incorporating five different curvature gradients into the GRINCU setup. We calculated the average cardinal points and Zernike aberration coefficients for each SyntEyes sample, along with the cardinal points for each lens model. GRINCU lens configurations with increased IIS curvature toward the center result in an average forward shift of the lens principal planes, leading to increased ocular power relative to the homogeneous lens model. Steeper curvature gradients of the IIS towards the lens center result in reduced astigmatism, defocus, lateral coma, and primary spherical aberration. The interplay between the lens’s gradient index and IIS curvature gradient alters the optical properties of the eye as a whole, highlighting the crucial role of the lens’s internal properties in optical performance. 000162139 536__ $$9info:eu-repo/grantAgreement/EC/H2020/956720/EU/Opto-Biomechanical Eye Research Network/OBERON$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 956720-OBERON 000162139 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 000162139 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000162139 700__ $$aNavarro, Rafael 000162139 700__ $$aRozema, Jos 000162139 773__ $$g18, 3 (2025), 100568 [10 pp.]$$pJ. optom.$$tJournal of Optometry$$x1888-4296 000162139 8564_ $$s2286889$$uhttps://zaguan.unizar.es/record/162139/files/texto_completo.pdf$$yVersión publicada 000162139 8564_ $$s2226882$$uhttps://zaguan.unizar.es/record/162139/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000162139 909CO $$ooai:zaguan.unizar.es:162139$$particulos$$pdriver 000162139 951__ $$a2025-10-17-14:33:22 000162139 980__ $$aARTICLE