Six-Year Outcomes Of Visian Implantable Collamer Lens With A Central Hole In Patients With Low- And Normal-Vault

To investigate the long-term visual outcomes and safety of the V4c Implantable Collamer Lens (ICL) throughout 6 years of follow-up in patients with low-, normal-vault.

Eye and ENT Hospital of Fudan University, Shanghai, China.

This study included eyes that underwent a V4c ICL implantation with six years of follow-up. The eyes were divided into two groups according to the vault: Vault < 250 μm and between 250 and 750 µm. They were followed up for 6 years of the uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), intraocular pressure (IOP), spherical equivalent (SE), axial length (AL), endothelial cell density (ECD), vault and ultrasound biomicroscopy (UBM) and swept-source OCT (Casia-2).

No differences in UDVA, CDVA, IOP and refraction were found between groups at six years of follow-up. The IOP remained stable throughout the follow-up. No significant difference in ECD from the preoperative at the 6-year postoperatively was observed in the low- and normal-vault groups. No ICL-induced anterior subcapsular opacity, pigment dispersion glaucoma, capsular block syndrome or other vision-threatening complications were reported over the follow-up.

Long-term visual outcomes of V4C ICL implantation were satisfactory in stability, efficacy and safety, supporting that the central hole can potentially reduce the risk of lens opacification.