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Express"],"published-print":{"date-parts":[[2026,6,15]]},"abstract":"<jats:p>We propose a wide-field biconcave implantable contact lens (ICL) design framework that combines third-order Seidel aberration theory with a field-dependent double Zernike (DZ) freeform surface model to address off-axis aberration growth and peripheral image-quality degradation under wide-field conditions. A wavefront model for the biconcave structure is established, and a full-field weighted RMS metric is introduced to evaluate global optical performance over the 0\u00b0\u201320\u00b0 half-field range. Simulations based on the Liou\u2013Brennan eye model show that the proposed biconcave ICL maintains superior off-axis MTF at large field angles compared with plano-concave and meniscus baselines under both \u22122.00 D and \u22125.00 D correction conditions. In terms of the full-field RMS metric, the biconcave design performs best in the \u22122.00 D case, while the meniscus design yields the lowest integrated RMS in the \u22125.00 D case. These results indicate that the proposed biconcave freeform design is particularly advantageous for peripheral wide-field image-quality preservation, while its global wavefront advantage depends on the correction level.<\/jats:p>","DOI":"10.1364\/oe.603216","type":"journal-article","created":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T03:00:13Z","timestamp":1779418813000},"page":"23027","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Biconcave freeform implantable contact lenses: wide-field design and peripheral aberration optimization"],"prefix":"10.1364","volume":"34","author":[{"given":"Chongxing","family":"Liu","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/007mntk44","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying","family":"Yang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/007mntk44","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wanting","family":"Yang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/007mntk44","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shihao","family":"Sun","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/007mntk44","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Changxi","family":"Xue","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/007mntk44","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-4859-8485","authenticated-orcid":true,"given":"Bo","family":"Dong","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/007mntk44","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,6,12]]},"reference":[{"key":"oe-34-12-23027-R1","doi-asserted-by":"publisher","first-page":"1033","DOI":"10.2147\/OPTH.S456397","type":"journal-article","volume":"18","author":"Thompson","year":"2024","journal-title":"Clin. 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