Estimating Implantable Collamer Lens Vault From Scheimpflug-Derived Postoperative Anterior Chamber Volume Change in Chinese Eyes
Year: 2026
Type: article
Study design: Observational Study
Abstract: PURPOSE: To compensate for Pentacam's (Oculus Optikgeräte GmbH) flaw in Implantable Collamer Lens (ICL; STAAR Surgical) vault assessment, which is the difficulty to clearly detect the ICL itself, for the improvement of Pentacam's performance in the follow-up after ICL implantation. METHODS: One hundred fourteen eyes that had ICL implantation at Beijing Fenglian Eyecare Beau Care Clinic were pre-screened from January to December 2024 and were randomly divided into the formula establishment group (76 eyes) and the formula validation group (38 eyes). A regression formula was worked out with the perioperative variables measured by Pentacam to best correlate with postoperative ICL vault measured by anterior segment optical coherence tomography (AS-OCT) using Pearson correlations and multiple linear regressions in the formula establishment group, and it was then tested in the validation group. RESULTS: > .05). The estimation formula was: ICL vault (μm) = 1,710.94 - 157.81 × ICL size (mm) +13.20 × ΔACV (μL). The validation results showed that the mean absolute error, median absolute error, and root mean square error were 82.27, 77.54, and 99.31 μm, respectively. CONCLUSIONS: This study established the ICL vault estimation formula based on ΔACV measured by Pentacam to best correlate with vault measured by AS-OCT. It compensates for Pentacam's flaw in ICL vault assessment, which is the difficulty to clearly detect the ICL itself, and is especially valuable when AS-OCT is unavailable.
Source: Journal of Refractive Surgery
Authors: Yinan Liu, Meng Yang, Junquan Zan, Xiaoyong Chen
Institution: Peking University Third Hospital
Language: English
Subfield: Ophthalmology
Field: Medicine
Domain: Health Sciences
Open Access status: hybrid
OpenAlex ID: W7160876846