The posterior chamber phakic intraocular lens, also called as implantable contact lens (ICL), provides another option besides corneal surgery to correct ametropia. ICL implantation is widely used in patients with high myopia, anisometropia and keratoconus. Recently, the most commonly used ICL is the V4c model, characterized by a central hole, which facilitates aqueous humor flow and improves fluid circulation in front of the lens. Iridectomy is no longer necessary because of the central hole. ICL implantation is effective in improving both uncorrected and corrected visual acuity, with stable intraocular pressure in the long term. Compared with the conventional V4 ICL, the incidence of cataract formation is lower after V4c ICL implantation, with enhanced long-term safety and effectiveness. Prominent results have been achieved in the clinical application of the ICL, and ICL implantation can be the main choice for a metropia correction. Along with the application and research of the ICL, more and more debates on the clinical efficacy and complications of ICL implantation have occurred. Clear standards for the safety and effectiveness of the surgery and the assessment and treatment of postoperative complications are essential issues for clinicians. This article reviews the advances in clinical research on ICL implantation.
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