Abstract

Purpose: Study ICL sizing difference between measured minus predicted postoperative vault (prediction error)using an AI model on 3D corneal diameter(CD) profiles.
Methods: We analyzed 350 eyes of patients who had ICL surgery. Using 25-meridian Scheimpflug corneal tomography scans(Pentacam HR),we derived the corneal diameter profile and fitted a skewed Gaussian curve to the delta CD values. We divided the eyes into two groups based on the postoperative vault and performed a descriptive and predictive AI analysis.
Results: The groups showed differences in Delta CD value(p=0.001),amplitude,min CD,and max CD(p<0.05). Regression analysis between prediction error and delta CD had an r of 0.9 and was significant(p=0.03).Beyond 1.2mm of delta CD, the prediction error increased by 127µm for every 0.1m increase in delta CD. Decision tree AI model had an area under the curve of 0.9.
Conclusion:3-D corneal diameter may improve ICL sizing through the calculator reduce postoperative vault surprise.

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