AIM: To analyze the changes in the central vault after implantable contact lens(ICL)implantation and its impact in patients with high myopia.

METHODS: The clinical data of 27 patients(54 eyes)with high myopia were recievd ICL implantation in our hospital from January 2016 to July 2017 were retrospectively analyzed, the vault was examined by Pentacam scheimpflug system at 1mo and 12mo after operation. The effects of white to white distance, ICL length, ICL degree, equivalent spherical mirror degree(spherical equivalent, SE)and pupil diameter on the change of arch height were analyzed by multiple linear regression analysis.

RESULTS: One month after ICL implantation, the vault was 582.45±173.18μm, 12mo after the operation, the vault was 509.47±163.82μm, 12mo after operation was significantly lower than that of 1mo after the operation, the difference was statistically significant(t=2.099, P<0.05); The results of multivariate linear regression analysis showed that the length of ICL, the degree of ICL and the equivalent spherical lenses were independent factors affecting the arch height at 1mo and 12mo after ICU implantation in high myopia patients(P<0.05); The length of ICL and the white to white distance of cornea(WTW)were factors that were significantly associated with a decrease in the vault(P<0.05).

CONCLUSION: The vault was reduced in 12mo after ICL implantation, and the length of ICL and WTW had a significant influence decrease in the vault. The length of ICL, the degree of ICL and the degree of the equivalent sphere had a significant influence on the vault.