The Analysis Of Inter-Eye Vault Differences After Implantable Collamer Lens Implantation

Objective:Safety and stability of implantable collamer lens implantation are closely related to the vault.We aimed to determine the clinical data of patients with similar anterior segment anatomy who were implanted with implantable collamer lenses of the same model placed in the same position and analyze the common range and factors affecting the intereye vault difference.Methods:We analyzed 81 patients who received bilateral implantable collamer lenses.We then analyzed intereye vault differences and horizontal sulcus-to-sulcus diameter,anterior chamber depth,lens thickness,implantable collamer lens size,spherical equivalent,and vault.Results:At one month after surgery,mean vault intereye differences were 74.59 ± 55.59 μm.Nearly 70% of the patients presented with vault intereye differences lower than 100 μm.The second eye vault variance of 69% was attributed to the first eye vault.Differences in vault intereye differences were positively correlated with implantable collamer lens spherical equivalent.Conclusion:In eyes with similar anterior segment anatomy,there is a 95% probability that the vault will vary from-34.4 μm to-183.6 μm when a similar implantable collamer lens is implanted.These results can help surgeons select an appropriate implantable collamer lens size to achieve an ideal vault.The smaller the spherical equivalent,the larger the difference between the two vaults,which provides a reference for the selection of the implantable collamer lens size in moderate myopia.