Abstract: Vault is an important index to evaluate the safety of implantable collamer lens(ICL) implantation, and is also the focus of this surgical research. The choice of ICL size is the most important controllable factor for postoperativevault. The most traditional ICL size selection method is selected by white-to-white diameterand anterior chamber depth, but the accuracy of this method is not satisfactory. Therefore, researchers have tried to predict the postoperative arch height and ICL size through ultrasound biomicroscopy（UBM）, anterior segment OCT and even artificial intelligence, and achieved certain results. This article attempts to compare and analyze various vaulting prediction and ICL size selection methods, and expounds the characteristics, effects and evolution history of various methods.

Key words: vault, prediction, anterior segment OCT, ICL implantation