Preoperative Tomographic and Biomechanical Corneal Assessment for Refractive Surgery

胡鴻琳 Hung-Ling HuTaiwan Speaker Preoperative Tomographic and Biomechanical Corneal Assessment for Refractive SurgerySummary Appropriate patient selection remains fundamental to safe refractive laser surgery. Corneal tomography and corneal biomechanics are central to identifying early ectatic changes and biomechanical vulnerability. Tomography offers a 3-dimensional assessment of anterior and posterior corneal surfaces, enabling detection of subtle keratoconus and other contraindications. Key parameters such as posterior elevation patterns and pachymetric distribution help quantify ectasia risk. Corneal biomechanics, assessed with technologies like the Corvis ST or ORA, provide direct measurements of tissue stability. Metrics including deformation amplitude and corneal stiffness can uncover susceptibility to postoperative ectasia, even when tomography findings are within normal limits. Integrating both modalities improves preoperative risk stratification, enhances surgical safety, and supports more individualized refractive planning.