A personalized finite-element biomechanical model of the keratoconic cornea has been developed for digital simulation of intrastromal segment implantation surgery. The model incorporates patient-specific geometric parameters and mechanical properties of the corneal tissue, including zones of pathological changes with reduced stiffness. A comprehensive approach to surgical simulation has been established, encompassing the stages of corneal applanation, formation of the intrastromal channel, implant–tissue contact interactions, and decohesion processes. Numerical predictions of the influence of various segment parameters (thickness, arc length, position) on corneal biomechanical behavior and keratotopographic correction are presented. Model validation on a clinical case of stage III keratoconus demonstrated high predictive accuracy, with deviations within 15–20%.

Igor N. Zakharov, Doctor of Technical Sciences, Head of the Department of Strength of Materials; e-mail: zaxap@mail.ru; https://orcid.org/0000-0001-7177-7245; AuthorID: 142419

Elena G. Solodkova, Candidate of Medical Sciences, Deputy Director for Research; e-mail: solo23el@mail.ru; https://orcid.org/0000-0002-7786-5665; AuthorID: 652843

Sergey V. Balalin, Doctor of Medical Sciences, Head of the Research Department; e-mail: s.v.balalin@gmail.com; https://orcid.org/0000-0002-5250-3692; AuthorID: 267867

Van Hoang Le, Postgraduate Student; e-mail: hoangle.vol@gmail.com; https://orcid. org/0000-0002-1536-3061; AuthorID: 1194083

Evgeny V. Lobanov, Engineer; e-mail: omt@isee.ru; https://orcid.org/0000-0001-9112-3230; AuthorID: 1163700