Abstract: Implantable collamer lens（ICL) implantation is a common refractive surgery. The amount of ICL implantation is increasing year by year, especially the new type of V4c ICL. The efficacy and safety of the operation have been recognized by doctors and patients with the application of the new type ICL (V4c). It is necessary to summarize the complications in the use of V4c ICL in order to make better clinical application. This review summarizes the common and rare postoperative complications of ICL in the refractive surgery, such as the analysis of corneal endothelial cell density, intraocular pressure, vault ect. Compared with V4 ICL, the incidence of complications such as corneal endothelial cell loss, anterior subcapsular cataract and pupil block after V4c ICL is lower, but the postoperative optical related complications and abnormal vault still exist.(Int Rev Ophthalmol, 2022, 46:  97-103)

Key words: implantable collamer lens, complication