| INTRODUCTION: To investigate the changes in vault and the effect on visual outcomes one year after Implantable Collamer Lens (ICL) implantation.
METHODS: In this retrospective study, 127 eyes of 66 patients undergoing ICL implantation were examined both before and up to 1 year after the surgery. The examination contents included white-to-white (WTW) diameter, central vault of the ICL (distance between posterior surface of ICL and anterior surface of crystalline lens), refractive error and wavefront high order aberration (HOA). All statistical analyses were performed using SPSS 13.0 software.
RESULTS: A significant decrease in vault was noted up to 1 month, after which the value stabilized (p<.0001). The moderate vault decreased statistically significant after the first 3 months post-surgery (Paired Samples T Test, P < 0.05). But the low vault showed a tendency to increase and the high vault showed a tendency to decrease, being both not statistically significant over time. There was no statistically significant correlation between the amount of vault and the refractive error (Pearson correlation coefficient R=0.111, P =0.473) and statistically significant correlation between the vault and HOAs (R = 0.304, P = 0.024).
CONCLUSIONS: ICL vault over the crystalline lens had the tendency toward a slight decrease with time and did not significantly affect the vision outcome 1 year after surgery. | 
